26 results on '"Barber LK"'
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2. Is Electronic Multitasking Always Viewed as a Counterproductive Meeting Behavior? Understanding the Nature of the Secondary Task.
- Author
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De Bruin R and Barber LK
- Subjects
- Electronics, Humans, Multitasking Behavior
- Abstract
This project explored social evaluations of electronic multitasking during work meetings, including factors that may affect whether it is seen as a counterproductive meeting behavior. We used an experimental vignette design to test whether social evaluations (norm violating, agency, and communalism) of a hypothetical coworker's electronic multitasking differed by whether the secondary task was relevant to the meeting (Study 1; N = 274) or ambiguous (Study 2; N = 188). Observers evaluated task-irrelevant multitasking as more of a norm violation and less communal compared to task-relevant multitasking, and work-related tasks were evaluated as more agentic than nonwork-related tasks. Ambiguous tasks were also rated as more agentic than task-irrelevant multitasking. Taken together, our results show that the nature of the secondary task reduces negative perceptions of coworkers' electronic multitasking behavior during meetings. However, electronic multitasking for any purpose, even if relevant, was generally judged negatively consistent with expectations for a counterproductive meeting behavior.
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- 2022
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3. Comparing Relaxation Versus Mastery Microbreak Activity: A Within-Task Recovery Perspective.
- Author
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Conlin A, Hu XJ, and Barber LK
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- Female, Humans, Male, Mental Fatigue psychology, Young Adult, Mental Fatigue prevention & control, Mental Fatigue therapy, Relaxation physiology, Relaxation psychology, Task Performance and Analysis, Work Performance, Workplace
- Abstract
Recovery from work is generally thought to occur outside of the workplace. However, employees may also have the opportunity to recover within the work day via microbreaks during demanding work tasks. Two major strategies for mitigating fatigue include psychological detachment (i.e., mentally disengaging) and replenishing motivational incentives via positive affect. This study examined whether 40-s "microbreaks" improve work recovery and to what extent different microbreak content (mastery vs. relaxation activities) boost performance. Using an experimental study, we randomly assigned individuals to receive a relaxation microbreak ( n = 59), a mastery microbreak ( n = 68), or no break ( n = 72) in the middle of a monotonous work task and assessed work performance. Microbreaks improved task performance and within-task recovery, but only for psychological detachment (not positive affect). Mastery breaks also resulted in more psychological detachment than relaxation breaks, but this increased detachment did not explain performance differences between break types. These results build on existing recovery theories by further demonstrating within-task recovery and provide practical implications for organizations to consider the importance of microbreaks.
- Published
- 2021
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4. Time to Disentangle the Information and Communication Technology (ICT) Constructs: Developing a Taxonomy around ICT Use for Occupational Health Research.
- Author
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Hu X, Park Y, Day A, and Barber LK
- Abstract
The use of information and communication technology (ICT) in the workplace has gained considerable research attention in the occupational health field due to its effects on employee stress and well-being. Consequently, new ICT-related constructs have proliferated in occupational health research, resulting in a need to take stock of both potential redundancies and deficiencies in the current measures. This paper disentangles ICT-related constructs, developing a taxonomy of ICT-related constructs in terms of ICT demands, resources, motivation, use, and strains. We then integrate this taxonomy with stress and motivation theories to identify three key implications for ICT and workplace health research and practices in terms of providing suggestions on understudied areas for building better theories, highlighting important psychometric issues for building better constructs and measures, and offering recommendations for building better interventions. This review aims to serve as a guide for researchers to move forward with the current state of research and provide recommendations for organizations in terms of both potential repercussions and best practices for ICT use in the workplace., Competing Interests: Conflict of InterestOn behalf of all authors, the corresponding author states that there is no conflict of interest., (© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021.)
- Published
- 2021
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5. Workplace telepressure and work-life balance outcomes: The role of work recovery experiences.
- Author
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Barber LK, Conlin AL, and Santuzzi AM
- Subjects
- Adult, Burnout, Professional etiology, Employment psychology, Female, Humans, Male, Middle Aged, Surveys and Questionnaires, Telecommunications, Electronic Mail, Work-Life Balance, Workplace psychology
- Abstract
Workplace technology has posed some challenges to worker well-being. This research examined how workplace telepressure-a preoccupation and urge to respond quickly to message-based communications-is related to work life balance evaluations, as well as how work recovery experiences might explain this relationship. Using an online survey design, Study 1 (N = 254) and Study 2 (N = 409) demonstrated that employees' workplace telepressure negatively related to satisfaction with work-life balance. Study 1 showed that psychological detachment may explain the relationship between workplace telepressure and satisfaction with work-life balance. In Study 2, psychological detachment and control over leisure time explained the relationship between workplace telepressure and global evaluations of work-life balance (satisfaction and effectiveness). Mastery and control experiences explained the relationship between workplace telepressure and work-family enrichment. Lastly, three recovery mechanisms (detachment, relaxation, and control) explained the link between workplace telepressure and work-family conflict. The evidence suggests that workplace telepressure is negatively associated with various employee evaluations of work-life balance, but the role of recovery experiences may depend on how work-life balance is measured., (© 2019 John Wiley & Sons, Ltd.)
- Published
- 2019
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6. Workplace intrusions and employee strain: the interactive effects of extraversion and emotional stability.
- Author
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Rogers AP and Barber LK
- Subjects
- Adult, Female, Humans, Male, Occupational Stress epidemiology, Personality Inventory, Surveys and Questionnaires, Emotional Intelligence, Extraversion, Psychological, Occupational Stress etiology, Workplace psychology
- Abstract
Background/objectives: Intrusions are a type of workplace interruption defined as unexpected interpersonal contact that disrupts workflow. Drawing from the Job Demands-Resources model of work stress, we examined how two personal resources - extraversion and emotional stability - influence relations among intrusions and strain outcomes., Design/methodology: Self-reported, online questionnaire data were collected from two samples; 323 faculty and staff from a university (sample 1) and 574 full-time employees recruited from an online crowdsourcing forum (sample 2)., Results: In sample 1 extraversion was positively related to intrusions, whereas in sample 2, extraversion and emotional stability were negatively related to intrusions. There were no interactive effects of personality on relations among intrusions and strain outcomes in sample 1. In sample 2, low emotional stability strengthened relations among intrusions and work tension. Additionally, intrusions were negatively associated with stress for individuals high on emotional stability. Finally, introverts experienced less stress in response to intrusions., Conclusion: Taking a person-situation interactionist approach, we examined personal resources that may mitigate interruption-related strain. Our findings suggest that for employees high in emotional stability, interruptions may be both less detrimental and, in some cases, beneficial. This study has practical implications for the structuring of work environments to mitigate strain and maximize person-environment fit.
- Published
- 2019
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7. Development and validation of the Workplace Interruptions Measure.
- Author
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Wilkes SM, Barber LK, and Rogers AP
- Subjects
- Adult, Female, Humans, Male, Middle Aged, Psychometrics, Self Report, Attention physiology, Stress, Psychological psychology, Workload psychology, Workplace psychology
- Abstract
In 3 studies, we developed and tested the first comprehensive, self-report measure of workplace interruptions. The Workplace Interruptions Measure (WIM) is based on a typology of interruptions that included intrusions, distractions, discrepancy detections, and breaks. The four-factor structure was reduced to a 12-item measure in Study 1 (N = 317) and confirmed in a diverse sample of employees in Study 2 (N = 160). Study 3 (N = 323) further examined the psychometric properties of the WIM in a sample of university faculty and staff. Studies 2 and 3 demonstrated that both effort-enhancing interruptions (intrusions, distractions, and discrepancy detections) and recovery-enhancing interruptions (breaks) were associated with stressors and strains. Distractions, discrepancy detections, and breaks uniquely predicted strain outcomes beyond other workplace stressors (i.e., quantitative workload, interpersonal conflict, and role conflict). We discuss implications of the WIM for the theory and practice of interruptions research., (Copyright © 2017 John Wiley & Sons, Ltd.)
- Published
- 2018
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8. Modifying the Sleep Treatment Education Program for Students to include technology use (STEPS-TECH): Intervention effects on objective and subjective sleep outcomes.
- Author
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Barber LK and Cucalon MS
- Subjects
- Actigraphy, Adult, Female, Humans, Male, Universities, Young Adult, Health Behavior, Health Education methods, Outcome Assessment, Health Care, Sleep, Students
- Abstract
University students often have sleep issues that arise from poor sleep hygiene practices and technology use patterns. Yet, technology-related behaviors are often neglected in sleep hygiene education. This study examined whether the Sleep Treatment Education Program for Students-modified to include information regarding managing technology use (STEPS-TECH)-helps improve both subjective and objective sleep outcomes among university students. Results of an experimental study among 78 university students showed improvements in objective indicators of sleep quantity (total sleep time) and sleep quality (less awakenings) during the subsequent week for students in the STEPS-TECH intervention group compared to a control group. Exploratory analyses indicated that effects were driven by improvements in weekend days immediately following the intervention. There were also no intervention effects on subjective sleep quality or quantity outcomes. In terms of self-reported behavioral responses to educational content in the intervention, there were no group differences in sleep hygiene practices or technology use before bedtime. However, the intervention group reported less technology use during sleep periods than the control group. These preliminary findings suggest that STEPS-TECH may be a useful educational tool to help improve objective sleep and reduce technology use during sleep periods among university students., (Copyright © 2017 John Wiley & Sons, Ltd.)
- Published
- 2017
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9. Ethical considerations for sleep intervention in organizational psychology research.
- Author
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Barber LK
- Subjects
- Humans, Behavior Therapy ethics, Behavioral Research ethics, Health Education ethics, Occupational Health ethics, Psychology, Industrial ethics, Sleep
- Abstract
Over the past several years, interest into the role of sleep in the workplace has grown. The theoretical shift from research questions examining sleep as an outcome to placing sleep as the independent variable has increased experimental approaches to manipulating sleep in organizational studies. This is an exciting trend that is likely to continue in the organizational sciences. However, sleep experimentation can also pose special challenges for organizational researchers unaccustomed to sleep science. In this commentary, I discuss five ethical considerations of conducting negative sleep interventions in organizational psychology research. I also provide recommendations for organizational researchers-or even other researchers in disciplines outside of sleep science-who wish to implement sleep interventions in their studies., (Copyright © 2017 John Wiley & Sons, Ltd.)
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- 2017
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10. PhD students: living wage key to diversity.
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Barber LK, Barber NA, and Jones HP
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- Child Care economics, Child, Preschool, Humans, Minority Groups education, Education, Graduate economics, Research Personnel economics, Research Personnel education, Salaries and Fringe Benefits economics, Students
- Published
- 2017
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11. A self-regulatory perspective of work-to-home undermining spillover/crossover: Examining the roles of sleep and exercise.
- Author
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Barber LK, Taylor SG, Burton JP, and Bailey SF
- Subjects
- Adult, Female, Humans, Male, Employment psychology, Exercise physiology, Family Relations psychology, Self-Control psychology, Sleep physiology
- Abstract
Research demonstrating that employees who are undermined at work engage in similar behavior at home suggests this connection reflects displaced aggression. In contrast, the present study draws on self-regulation theory to examine the work-home undermining spillover/crossover process. We propose that poor sleep quality transmits the influence of workplace undermining to home undermining per self-regulatory impairment, and exercise moderates this indirect effect per self-regulatory improvement. Using matched data from 118 employees and a member of their household to test our model, results demonstrated that undermining experienced from supervisors increased subjective (i.e., self-reported) but not objective (i.e., actigraph-recorded) sleep difficulties, which, in turn, increased the frequency with which individuals engaged in undermining at home (as reported by cohabitants). Additionally, indirect effects occurred for employees with low but not high levels of physical exercise (as measured by self-reports, step counts, and energy expenditure). Our findings suggest sleep and exercise may serve as valuable intervention points to prevent the spread of harmful behavior across contexts. Implications for theory and practice are discussed. (PsycINFO Database Record, ((c) 2017 APA, all rights reserved).)
- Published
- 2017
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12. Meticulous manuscripts, messy results: Working together for robust science reporting.
- Author
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Barber LK
- Subjects
- Humans, Biomedical Research standards, Data Interpretation, Statistical, Periodicals as Topic standards
- Published
- 2017
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13. Telepressure and College Student Employment: The Costs of Staying Connected Across Social Contexts.
- Author
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Barber LK and Santuzzi AM
- Subjects
- Adolescent, Adult, Female, Humans, Male, Psychometrics instrumentation, Reproducibility of Results, Surveys and Questionnaires standards, Universities, Young Adult, Employment psychology, Social Media, Social Networking, Stress, Psychological psychology, Students psychology
- Abstract
Telepressure is a psychological state consisting of the preoccupation and urge to respond quickly to message-based communications from others. Telepressure has been linked with negative stress and health outcomes, but the existing measure focuses on experiences specific to the workplace. The current study explores whether an adapted version of the workplace telepressure measure is relevant to general social interactions that rely on information and communication technologies. We validated a general telepressure measure in a sample of college students and found psychometric properties similar to the original workplace measure. Also, general telepressure was related to, but distinct from, the fear of missing out, self-control and technology use. Using a predictive validity design, we also found that telepressure at the beginning of the semester was related to student reports of burnout, perceived stress and poor sleep hygiene 1 month later (but not work-life balance or general life satisfaction). Moreover, telepressure was more strongly related to more negative outcomes (burnout, stress and poor sleep hygiene) and less positive outcomes (work-life balance and life satisfaction) among employed compared with non-employed students. Thus, the costs of staying connected to one's social network may be more detrimental to college students with additional employment obligations. Copyright © 2016 John Wiley & Sons, Ltd., (Copyright © 2016 John Wiley & Sons, Ltd.)
- Published
- 2017
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14. Home is Private…Do Not Enter! Introversion and Sensitivity to Work-Home Conflict.
- Author
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Baer SM, Jenkins JS, and Barber LK
- Subjects
- Adult, Female, Humans, Male, Burnout, Professional psychology, Conflict, Psychological, Employment psychology, Family psychology, Introversion, Psychological, Stress, Psychological psychology
- Abstract
This study examined extraversion as a moderator of the relationship between negative work-home conflict and stress-related outcomes among US employees using conservation of resources theory and privacy regulation theory. Introverts only experienced stronger negative effects of negative work-home conflict on work-related resource depletion (job burnout, low engagement, low satisfaction with balance) rather than general resource depletion (personal burnout) and strain (physical and psychological). This finding suggests that introverts selectively withdraw from the work domain to conserve resources when privacy at home is threatened. Employers may want to consider ways to help introverts increase work-home segmentation, such as reducing workplace norms that encourage employees to be continuously accessible. Copyright © 2014 John Wiley & Sons, Ltd., (Copyright © 2014 John Wiley & Sons, Ltd.)
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- 2016
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15. Psychologically detaching despite high workloads: The role of attentional processes.
- Author
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Smit BW and Barber LK
- Subjects
- Adult, Female, Goals, Humans, Leisure Activities psychology, Male, Middle Aged, Random Allocation, Regression Analysis, Stress, Psychological psychology, Surveys and Questionnaires, United States, Workplace psychology, Young Adult, Self-Control, Work psychology, Workload psychology
- Abstract
Although psychologically detaching from work is beneficial for employee well-being and productivity, heavy workloads can interfere with detachment. Drawing from the self-regulation literature, we expand the stressor-detachment model to explore 2 attentional factors that shape the workload-detachment relationship: dispositional self-control-defined as a trait ability to regulate thoughts and behavior-and a daily planning intervention designed to direct attention away from incomplete work goals. Overall, we hypothesized that the ability to control and redirect attention is crucial for detaching from high workloads. Using an experimental daily diary design with 103 employees, we replicated previous results that daily workload is negatively associated with daily psychological detachment. However, this relationship was nonsignificant for individuals high on dispositional self-control and those that completed the planning intervention. We also observed a 3-way interaction, where the planning intervention was only effective for individuals low on dispositional self-control because employees high on self-control were naturally better at detaching from high workloads. Overall, these results illustrate the theoretical and practical utility of an attention-based perspective on detachment processes, including a simple intervention for helping individuals detach at home despite high workloads. (PsycINFO Database Record, ((c) 2016 APA, all rights reserved).)
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- 2016
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16. The Work-Family Interface as a Mediator between Job Demands and Employee Behaviour.
- Author
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Jenkins JS, Heneghan CJ, Bailey SF, and Barber LK
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- Adult, Female, Humans, Male, Middle Aged, Employment psychology, Family psychology, Interpersonal Relations, Personnel Loyalty
- Abstract
In this investigation, we draw from the job demands-resource model and conservation of resources theory to examine the relationship between job demands, the work-family interface and worker behaviours. Data collected from an online survey of workers revealed that hindrance demands indirectly increase interpersonal and organizational deviance through work interference with family and family interference with work. Challenge demands indirectly predict interpersonal and organizational deviance through work interference with family. Finally, hindrance demands indirectly decreased individual-directed organizational citizenship behaviours through work-to-family enrichment. Taken together, these results stress the relevance of job demand management and resource drain/acquisition to counterproductive and extra-role behaviours., (Copyright © 2014 John Wiley & Sons, Ltd.)
- Published
- 2016
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17. Please respond ASAP: workplace telepressure and employee recovery.
- Author
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Barber LK and Santuzzi AM
- Subjects
- Absenteeism, Burnout, Professional etiology, Burnout, Professional psychology, Humans, Stress, Psychological etiology, Surveys and Questionnaires, Telecommunications, Workplace psychology, Electronic Mail, Employment psychology
- Abstract
Organizations rely heavily on asynchronous message-based technologies (e.g., e-mail) for the purposes of work-related communications. These technologies are primary means of knowledge transfer and building social networks. As a by-product, workers might feel varying levels of preoccupations with and urges for responding quickly to messages from clients, coworkers, or supervisors--an experience we label as workplace telepressure. This experience can lead to fast response times and thus faster decisions and other outcomes initially. However, research from the stress and recovery literature suggests that the defining features of workplace telepressure interfere with needed work recovery time and stress-related outcomes. The present set of studies defined and validated a new scale to measure telepressure. Study 1 tested an initial pool of items and found some support for a single-factor structure after problematic items were removed. As expected, public self-consciousness, techno-overload, and response expectations were moderately associated with telepressure in Study 1. Study 2 demonstrated that workplace telepressure was distinct from other personal (job involvement, affective commitment) and work environment (general and ICT work demands) factors and also predicted burnout (physical and cognitive), absenteeism, sleep quality, and e-mail responding beyond those factors. Implications for future research and workplace practices are discussed., ((c) 2015 APA, all rights reserved).)
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- 2015
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18. Conceptualizations of sleep in stress theory: exciting new directions.
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Barber LK
- Subjects
- Humans, Internal-External Control, Sleep, Stress, Psychological psychology
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- 2014
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19. Using the Networked Fire Chief for ego-depletion research: measuring dynamic decision-making effort and performance.
- Author
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Barber LK and Smit BW
- Subjects
- Adult, Female, Humans, Male, Stroop Test, Young Adult, Decision Making physiology, Ego, Executive Function physiology
- Abstract
This study replicated ego-depletion predictions from the self-control literature in a computer simulation task that requires ongoing decision-making in relation to constantly changing environmental information: the Network Fire Chief (NFC). Ego-depletion led to decreased self-regulatory effort, but not performance, on the NFC task. These effects were also buffered by task enjoyment so that individuals who enjoyed the dynamic decision-making task did not experience ego-depletion effects. These findings confirm that past ego-depletion effects on decision-making are not limited to static or isolated decision-making tasks and can be extended to dynamic, naturalistic decision-making processes more common to naturalistic settings. Furthermore, the NFC simulation provides a methodological mechanism for independently measuring effort and performance when studying ego-depletion.
- Published
- 2014
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20. Creating technological boundaries to protect bedtime: examining work-home boundary management, psychological detachment and sleep.
- Author
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Barber LK and Jenkins JS
- Subjects
- Adult, Female, Humans, Male, Occupational Diseases psychology, Stress, Psychological psychology, Adaptation, Psychological physiology, Information Science, Sleep physiology, Telecommunications, Workplace psychology
- Abstract
This study examined the mechanism by which information and communication technology (ICT) use at home for work purposes may affect sleep. In this investigation, data from 315 employees were used to examine the indirect effect of ICT use at home on sleep outcomes through psychological detachment, and how boundary creation may moderate this effect. Results revealed the indirect effect of increased work-home boundary crossing on sleep (quantity, quality and consistency) through psychological detachment occurred only among individuals with low boundaries around ICT use and not among those with high boundaries. These results suggest that creating boundaries around work-relevant ICT use while at home is beneficial to sleep as a recovery process through being able to psychologically disengage from work., (Copyright © 2013 John Wiley & Sons, Ltd.)
- Published
- 2014
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21. Examining the nomological network of satisfaction with work-life balance.
- Author
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Grawitch MJ, Maloney PW, Barber LK, and Mooshegian SE
- Subjects
- Adult, Data Collection, Female, Humans, Male, Psychological Tests, Surveys and Questionnaires, Adaptation, Psychological, Employment psychology, Job Satisfaction, Personal Satisfaction
- Abstract
This study expands on past work-life research by examining the nomological network of satisfaction with work-life balance-the overall appraisal or global assessment of how one manages time and energy across work and nonwork domains. Analyses using 456 employees at a midsized organization indicated expected relationships with bidirectional conflict, bidirectional facilitation, and satisfaction with work and nonwork life. Structural equation modeling supported the utility of satisfaction with balance as a unique component of work-life interface perceptions. Results also indicated that satisfaction with balance mediated the relationship between some conflict/facilitation and life satisfaction outcomes, though conflict and facilitation maintained unique predictive validity on domain specific outcomes (i.e., work-to-life conflict and facilitation with work life satisfaction; life-to-work conflict and facilitation with nonwork life satisfaction)., (PsycINFO Database Record (c) 2013 APA, all rights reserved.)
- Published
- 2013
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22. Counterproductive work behaviours in response to emotional exhaustion: a moderated mediational approach.
- Author
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Bolton LR, Harvey RD, Grawitch MJ, and Barber LK
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- Adult, Efficiency, Emotions, Employment organization & administration, Fatigue, Female, Humans, Male, Organizational Culture, Regression Analysis, Social Control, Informal, Adaptation, Psychological, Burnout, Professional psychology, Depersonalization, Employment psychology, Models, Psychological
- Abstract
Drawing from the conservation of resources framework and self-control principles, we proposed a moderated mediational model through which emotional exhaustion may be linked to counterproductive work behaviours (CWBs). Analyses conducted with 175 Midwestern government workers revealed that both depersonalization (i.e. detachment from one's work, customers or co-workers) and organizational disidentification (i.e. cognitive opposition to an organization) were viable predictors of deviancy. Further, depersonalization and disidentification mediated the relationship between emotional exhaustion and CWBs, although disidentification drove these findings. Lastly, trait self-control moderated most variations of this relationship, in that this mediational model only applied to individuals with low and moderate self-control but not high self-control. Consistent with the conservation of resources framework, this study suggests that in a state of depleted emotional resources, heightened depersonalization and disidentification together provide the necessary levels of psychological/emotional withdrawal and justification for CWBs to emerge., (Copyright © 2011 John Wiley & Sons, Ltd.)
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- 2012
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23. Role identification, community socio-economic status demands, and stress outcomes in police officers.
- Author
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Grawitch MJ, Barber LK, and Kruger MH
- Subjects
- Adult, Data Collection, Female, Humans, Male, Midwestern United States, Personnel Turnover, Residence Characteristics, Social Identification, Socioeconomic Factors, Police, Professional Role psychology, Stress, Psychological etiology
- Abstract
This study applied the 'job demands-resources' and 'conservation of resources' models to police work, with the specific aim to examine the possible interaction between objectively measured work demands (community socio-economic status (SES)) and personal resources (role identification) on stress-related outcomes. A total of 89 officers from 10 small, suburban police departments (five from high SES areas and five from low SES areas) completed surveys that focused on community SES demands and role identification as factors that potentially influence positive and negative psychological outcomes. Results indicated that community (SES) demands and role identification interacted to predict a variety of the outcomes. Role identification as a psychological resource served to reduce the effects of high community SES demands on emotional exhaustion. Implications of these results for future police research are discussed.
- Published
- 2010
- Full Text
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24. Do prospective workday appraisals influence end-of-workday affect and self-monitored performance?
- Author
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Grawitch MJ, Granda SE, and Barber LK
- Subjects
- Adult, Employee Performance Appraisal, Female, Humans, Internal-External Control, Job Description, Male, Middle Aged, Missouri, Motivation, Personal Satisfaction, Self Concept, Universities, Young Adult, Affect, Faculty, Job Satisfaction, Students psychology, Workload psychology
- Abstract
The current study uses self-regulation as the basis for a model that examines the influence of three types of workday appraisals (resource, task, and response). At the beginning of their workday, a total of 170 faculty, graduate students, and staff of a university completed appraisal ratings of their anticipated workday tasks, resources, and responses. At the end of the workday, they completed assessments of positive and negative affect and self-monitored performance. Results suggested that resource appraisals of control and skills were predictive of task appraisals of difficulty, threat, and ambiguity. Task appraisals were then predictive of both response appraisals, in terms of anticipated support and effort, and self-monitored performance at the end of the day. Anticipated effort and self-monitored performance were both positively related to positive affect at the end of the day. Anticipated support and self-monitored performance were both negatively related to negative affect at the end of the day, while threat task appraisals were positively related to negative affect. Implications of the results for workplace interventions are discussed.
- Published
- 2008
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25. Prevalence of antibodies against Mycobacterium avium subsp paratuberculosis among beef cow-calf herds.
- Author
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Dargatz DA, Byrum BA, Hennager SG, Barber LK, Kopral CA, Wagner BA, and Wells SJ
- Subjects
- Animals, Cattle, Cattle Diseases immunology, Cattle Diseases microbiology, Cross-Sectional Studies, Enzyme-Linked Immunosorbent Assay veterinary, Paratuberculosis immunology, Paratuberculosis microbiology, Seroepidemiologic Studies, United States epidemiology, Antibodies, Bacterial blood, Cattle Diseases epidemiology, Mycobacterium avium subsp. paratuberculosis immunology, Paratuberculosis epidemiology
- Abstract
Objective: To estimate the prevalence of Mycobacterium avium subsp paratuberculosis infection among cows on beef operations in the United States., Design: Cross-sectional seroprevalence study. Sample Population-A convenience sample of 380 herds in 21 states., Procedures: Serum samples were obtained from 10,371 cows and tested for antibodies to M avium subsp paratuberculosis with a commercial ELISA. Producers were interviewed to collect data on herd management practices., Results: 30 (7.9%) herds had 1 or more animals for which results of the ELISA were positive; 40 (0.4%) of the individual cow samples yielded positive results. None of the herd management practices studied were found to be associated with whether any animals in the herd would be positive for antibodies to M avium subsp paratuberculosis., Conclusions and Clinical Relevance: Results suggest that the prevalence of antibodies to M avium subsp paratuberculosis among beef cows in the United States is low. Herds with seropositive animals were widely distributed geographically.
- Published
- 2001
- Full Text
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26. Evaluation of a commercial ELISA for diagnosis of paratuberculosis in cattle.
- Author
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Dargatz DA, Byrum BA, Barber LK, Sweeney RW, Whitlock RH, Shulaw WP, Jacobson RH, and Stabel JR
- Subjects
- Animals, Cattle, Cattle Diseases immunology, Cattle Diseases microbiology, Cross-Sectional Studies, Enzyme-Linked Immunosorbent Assay methods, Paratuberculosis immunology, Sensitivity and Specificity, Antibodies, Bacterial analysis, Cattle Diseases diagnosis, Enzyme-Linked Immunosorbent Assay veterinary, Mycobacterium avium subsp. paratuberculosis immunology, Paratuberculosis diagnosis
- Abstract
Objective: To evaluate sensitivity and specificity of a new ELISA for antibodies against Mycobacterium avium subsp paratuberculosis., Design: Cross-sectional observational survey., Sample Population: Serum samples from 590 cattle that were infected with M avium subsp paratuberculosis and 723 cattle that were not infected., Procedure: Serum samples were tested by use of an ELISA for antibodies against M avium subsp paratuberculosis., Results: Sensitivity of the test varied from 15.4 to 88.1%, depending on the clinical stage and bacterial shedding status of the cattle., Conclusions and Clinical Relevance: Results obtained with use of the new ELISA agreed favorably with those of a previous ELISA. Practitioners must be aware of variability in the sensitivity of the test, which depends on the clinical and shedding status of the cattle, because this may affect interpretation of test results.
- Published
- 2001
- Full Text
- View/download PDF
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