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Background noise is often discussed in terms of mental costs. In this study the effect of background noise on brain activity as reflected by the direct coupled (DC) potential was investigated by a within design in ten participants. During two successive blocks of 7 min each, participants performed 156 trials of a visual display terminal (VDT)-based visual-spatial attention task without noise and two blocks with a mixture of the environmental noises of barking dogs, traffic noise and irrelevant speech of 60 dBA. Brain DC potentials were recorded along the midline and analysed for change by time on task. For noise conditions, reaction time was prolonged and the DC-potential shifted towards positivity, contrary to control condition, independent of block and location. Results suggest reduced cortical resources by widespread inhibitory activation through background noise. It can be concluded that even low intensity background noise is associated with energy consumption and with impaired performance in spatial attention. [ABSTRACT FROM AUTHOR]

Effects on cognitive performance, social atmosphere, communication, motivation and aspects of strain were investigated when laptops were integrated in classrooms. According to a quasi-experimental design 27 laptop students were compared with 22 non-laptop students from the same high school, aged 17-18 years. Results of tests and questionnaires showed that laptop students had better spatial abilities and computer skills, furthermore higher participation, learning interest, motivation and pressure to perform were found in laptop classrooms. However, laptop students experienced greater physical discomfort, particularly in their arms, but concerning creativity, social intelligence and mental stress no group differences occurred. Results indicate that laptops integrated in teaching can enhance learning and motivation in schools, at least after 1.7 years of introduction, but health risks must be considered. [ABSTRACT FROM AUTHOR]

Ketamine treatment has shown promising effects for different mental disorders. Yet, little is known on how people who receive ketamine for a psychiatric problem subjectively experience undergoing this intervention. We conducted a systematic literature search to identify relevant qualitative research on the first-person experience of undergoing ketamine treatment in a psychiatric context. 24 eligible studies were identified and analysed using a thematic meta-synthesis approach. Three main themes were identified. First, 'The Ketamine treatment experience can be understood as a three-stage journey with unique clinical features at each stage'. Second, 'The subjective experience of acute ketamine treatment is multifaceted and complex'. Third, 'Ketamine treatment can have different positive effects-but what happens if it does not work?'. In summary, the subjective experience of receiving ketamine treatment for a psychiatric problem can be understood as a journey whereby patients move towards, then undergo, and eventually depart from ketamine. Before treatment, the experiential focus lies on expectations, hopes, and feelings towards the drug. During treatment, the drug's multifaceted psychotropic effects and how they are emotionally appraised become central to experience. Once treatment is finished, the focus is on the presence or absence of clinically relevant effects. The conceptual framework we propose can guide further qualitative research on this topic and aid mental health professionals to better understand the experience of patients who undergo ketamine treatment for a psychiatric problem., (© 2024 The Author(s). International Journal of Mental Health Nursing published by John Wiley & Sons Australia, Ltd.)

Purpose: Noise exposure in preschools is cited as one of the main stresses by preschool teachers in surveys worldwide. Hearing-related symptoms as well as physiological stress reactions are often mentioned in this context. Therefore, the aim of the study was to investigate whether the noise has an impact on the cardiovascular activity of the preschool teachers., Methods: The study took place in nine private preschools in Vienna. In the classrooms of 23 preschool teachers stationary noise recordings were conducted and the participants were equipped with 24-hour electrocardiograms (ECGs). Questionnaires on noise-related stress, well-being, stress perception, burnout risk, noise annoyance, and noise sensitivity were provided. Data were described descriptively and correlations and one-way analyses of variance (ANOVAs) with repeated measures were performed., Results: The average sound pressure level in the classrooms during the first four hours was L Aeq 74.7 dB(A) (standard deviation [SD] = 1.74). A significant correlation between heart rate and sound pressure level (L Aeq,4 h ) was found, r = 0.40, P = 0.04 (one-tailed). Noise sensitivity and noise annoyance showed no effect. With increasing sound level classes [≤65 dB(A), 66-75 dB(A), 76-85 dB(A)], the heart rate increased significantly, and the heart rate variability decreased significantly. It was also found that tolerating noise becomes more difficult with increasing length of employment and increasing age., Conclusion: The noise level in classrooms showed an impact on the cardiovascular activity of preschool teachers, which can be considered as an indicator of stress. Measures to reduce noise in preschools are recommended., Competing Interests: None

The regular analysis of publication trends, including gender aspects, is an important contribution to the identification of gender-specific differences in academic psychiatry. The present study aimed to characterise publication topics in three high-impact psychiatric journals across three time points within 15 years (2004, 2014 and 2019). Publication patterns of female authors compared to their male colleagues were examined. All articles published in 2019 in the three high-impact psychiatry journals JAMA Psychiatry, British Journal of Psychiatry and American Journal of Psychiatry were included and compared with data from the 2004 and 2014 assessments. Descriptive statistics were calculated and Chi-square tests were performed. In 2019, a total of 473 articles were published, 49.5% were original research articles, of which 50.4% were published by female first authors. The results of this study showed a stable trend in the publication of research on mood disorders as well as schizophrenia and psychotic disorders in high-ranking psychiatric journals. Although the percentage of female first authors in the three most common target populations under study (mood disorders, schizophrenia and general mental health) increased from 2004 to 2019, gender equality has not yet been achieved in these fields. However, in the two most frequent subject matters, basic biological research and psychosocial epidemiology, the percentage of female first authors was more than 50%. Consistent monitoring of publication trends and gender distribution by researchers and journals in psychiatric research should be continued to identify and counteract the possibility of the underrepresentation of women in certain fields., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Trimmel, Amering, Suessenbacher-Kessler, Schrank and Gmeiner.)

Gender parity and authorship diversity are declared goals in the publishing world. This study assessed the progress of authorship gender distribution over a quarter of a century and geographic diversity over the last 15 years in high-impact psychiatric journals. All articles published in 2019 in the American Journal of Psychiatry, the British Journal of Psychiatry, and JAMA Psychiatry were included and compared with data from three points in time starting in 1994. Descriptive statistics were gathered, and chi-square tests were performed. All tests were conducted as two-tailed, and p-values < 0.05 were considered to be statistically significant. Inter-rater reliability was calculated via Cohen's kappa. In 2019 a total of 473 articles were published. Forty percent of all authors, 42.3% of first authors, and 29.4% of senior authors were female. Counting original research articles only, female first authorship reached 50.4%. In the 25-year period between 1994 and 2019, female first (p < .001), female senior (p < .001), and female overall (p < .001) authorship has increased. In the specific period between 2014 and 2019, overall female senior authorship in all articles (p = .940) as well as first (p = .101) and senior (p = .157) in original research plateaued. In non-original research articles, female first authorship was higher in 2019 compared to 2014 (p = .014), whilst female senior authorship plateaued (p = .154). Geographic diversity was low and did not change over time. Gender parity in the subcategory original research articles was reached for the first time in 2019. Senior female authorship and geographic diversity remain areas of concern that need further investigation and specific interventions., (© 2022. The Author(s).)

This paper describes a silicon/glass sensing structure for axial angle measurements. The presented optical angular sensor can statically measure the angle φ of any apparatus depending on the torsion of the optical component against the sensor housing. Core element of the sensor is an optical medium with an etched structure, which diffracts light from an LED according to the Fresnel equation. Two photodiodes, one for angle determination and one as reference, conduct the measurement. Hence, the signal splits up into two parts: one part transmits trough the optical system and the second part (the reflected wave) is used as reference signal. For self-referencing purposes, the wavelength spectrum of the LED has its maximum in the infrared regime near to the wavelength where silicon gets transparent (l~1000 nm). More precisely, torsion angle and light intensity show a dependency given by Tstot if a straight etching structure (refraction profile) is used. To avoid multiple reflections of light, a coating layer restricts the illuminated area in the optical medium. With this setting a resolution of 0.05-degree rotation angle has been achieved and by stacking the construction, the sensor can measure an angular range from 30° up to 270°.

Acoustic environmental noise, even of low to moderate intensity, is known to adversely affect information processing in animals and humans via attention mechanisms. In particular, facilitation and inhibition of information processing are basic functions of selective attention. Such mechanisms can be investigated by analyzing brain potentials under conditions of externally directed attention (intake of environmental information) versus internally directed attention (rejection of environmental stimuli and focusing on memory/planning processes). This study investigated brain direct current (DC) potential shifts-which are discussed to represent different states of cortical activation-of tasks that require intake and rejection of environmental information under noise. It was hypothesized that without background noise rejection tasks would show more positive DC potential changes compared to intake tasks and that under noise both kinds of tasks would show positive DC shifts as an expression of cortical inhibition caused by noise. DC potential shifts during intake and rejection tasks were analyzed at 16 standard locations in 45 persons during irrelevant speech or white noise vs. control condition. Without noise, rejection tasks were associated with more positive DC potential changes compared to intake tasks. During background noise, however, this difference disappeared and both kinds of tasks led to positive DC shifts. Results suggest-besides some limitations-that noise modulates selective attention mechanisms by switching to an environmental information processing and noise rejection mode, which could represent a suggested "attention shift". Implications for fMRI studies as well as for public health in learning and performance environments including susceptible persons are discussed.

Background: Nonaviator fear of flying is a common problem usually managed with behaviorally oriented treatment. The unknown time courses of aspects of anxiety and of physiological response were investigated during a 3-d treatment including flights., Methods: Ratings, heart rate (HR), and heart rate variability (HRV; pNN10, pNN50) of 15 Moderate-Anxious and 9 High-Anxious subjects at critical epochs of treatment and on 2 actual flights, on which 9 Controls participated, were compared., Results: All subjects took the flights and displayed a remarkably reduced fear when comparing pre- vs. post-treatment ratings. Repeated ratings showed an increase in relaxation and drops in general somatic and cognitive aspects of anxiety during flights. However, cognitive aspects in High-Anxious did not drop to the level of Controls. Level of anxiety was related to cardiovascular activity almost always during treatment and flights, in particular during takeoffs (average maximum HR of 137 bpm in High-Anxious compared to 118 bpm in Moderate-Anxious and 98 bpm in Controls in the first flight). Moderate-Anxious showed no obvious relationship of cardiovascular response to critical flight epochs, but had the lowest HRV on flights., Discussion: Results indicate that anxiety in Moderate-Anxious is related to flight, but not to single critical epochs of flying, contrary to High-Anxious, for which higher ratings on cognitive aspects of anxiety associated with more physiological load at critical epochs were observed. However, HR and ratings showed a remarkable drop in both treatment groups, in particular in perceived physiological symptoms, indicating that the treatment facilitates coping of fear of flying.

The effects of low intensity noise on cognitive learning and autonomous physiological processes are of high practical relevance but are rarely addressed in empirical investigations. This study investigated the impact of neighbourhood noise (of 45 dB[A], n=20) and of noise coming from passing aircraft (of 48 dB[A] peak amplitude presented once per minute; n=19) during computer based learning of different texts (with three types of text structure, i.e. linear text, hierarchic hypertext, and network hypertext) in relation to a control group (35 dB[A], n=20). Using a between subjects design, reproduction scores, heart rate, and spontaneous skin conductance fluctuations were compared. Results showed impairments of reproduction in both noise conditions. Additionally, whereas in the control group and the neighbourhood noise group scores were better for network hypertext structure than for hierarchic hypertext, no effect of text structure on reproduction appeared in the aircraft noise group. Compared to the control group, for most of the learning period the number of spontaneous skin conductance fluctuations was higher for the aircraft noise group. For the neighbourhood noise group, fluctuations were higher during pre- and post task periods when noise stimulation was still present. Additionally, during the last 5 min of the 15 min learning period, an increased heart rate was found in the aircraft noise group. Data indicate remarkable cognitive and physiological effects of low intensity background noise. Some aspects of reproduction were impaired in the two noise groups. Cognitive learning, as indicated by reproduction scores, was changed structurally in the aircraft noise group and was accompanied by higher sympathetic activity. An additional cardiovascular load appeared for aircraft noise when combined with time pressure as indicated by heart rate for the announced last 5 min of the learning period during aircraft noise with a peak SPL of even 48 dB(A). Attentional mechanisms (attentional control) like being threatened by passing aircraft approaching the airport, higher demands of selective filtering, and difficulties in changing cognitive strategies during noise are discussed as underlying mechanisms., (Copyright © 2011 Elsevier GmbH. All rights reserved.)

Peer review is a widely accepted instrument for raising the quality of science. Peer review limits the enormous unstructured influx of information and the sheer amount of dubious data, which in its absence would plunge science into chaos. In particular, peer review offers the benefit of eliminating papers that suffer from poor craftsmanship or methodological shortcomings, especially in the experimental sciences. However, we believe that peer review is not always appropriate for the evaluation of controversial hypothetical science. We argue that the process of peer review can be prone to bias towards ideas that affirm the prior convictions of reviewers and against innovation and radical new ideas. Innovative hypotheses are thus highly vulnerable to being "filtered out" or made to accord with conventional wisdom by the peer review process. Consequently, having introduced peer review, the Elsevier journal Medical Hypotheses may be unable to continue its tradition as a radical journal allowing discussion of improbable or unconventional ideas. Hence we conclude by asking the publisher to consider re-introducing the system of editorial review to Medical Hypotheses.

A new head exposure system for double blinded human provocation studies, which requires EEG recording during exposure with GSM900- and UMTS-like signals has been developed and dosimetrically evaluated. The system uses planar patch antennas fixed at 65 mm distance from the subject's head by a special headset, which provides minimum impairment of the test subjects and ensures an almost constant position of the antennas with respect to the head, even in case of head movements. Compared to exposure concepts operating small antennas in close proximity to the head, the concept of planar antennas at a certain distance from the head produces a much more homogeneous SAR distribution in the temporal and parietal lobe of the brain. At the same time the resulting uncertainty of exposure due to variations in head size, variations of the dielectric properties of tissues and unavoidable small changes of the antenna's position with respect to the head, is reduced to the order of approximately 3 dB, which is a significant improvement to comparable head exposure systems reported in literature in the past. To avoid electromagnetic interference on the EEG recording caused by the incident RF-field an appropriate double-shielded filter circuit has been developed. Furthermore, the effect of the presence of the sintered Ag/AgCl EEG electrodes and electrode wires on the SAR distribution inside the head has been investigated and was found to be minimal if the electrode wires are arranged orthogonal to the incident electric field vector. EEG electrode arrangement parallel to the incident field vector, however, might cause drastic changes in the SAR distribution inside the head., ((c) 2007 Wiley-Liss, Inc.)

Background and Objectives: To establish if voluntary whole-blood donors and compensated platelet donors and plasma donors may differ in their motivation to donate, altruism, aggression and autoaggression., Material and Methods: Whole-blood (n=51), platelet (n=52) and plasma donors (n=48) completed a battery of validated questionnaires while waiting to donate. Bivariate and multivariate analyses of variance and t-tests were performed to detect differences between groups as noted., Results: Altruism (mean=40.2) was slightly higher in whole-blood donors than in platelet (mean=38.3) and plasma donors (mean=39.1) (p=0.07). Blood donors (mean=2.8) scored lower in the spontaneous aggression measure than platelet (mean=4.1) and plasma donors (mean=4.4) (p=0.01). Plasma donors (mean=4.9) had higher auto-aggression than whole-blood donors and platelet donors (mean for both groups=3.4) (p=0.01). Differences between the three groups were mediated by sociodemographic variables (MANCOVA). Whole-blood donors donated to help others, platelet and plasma donors mostly to receive the compensation. However, those platelet and plasma donors, who would continue to donate without compensation were similar in altruism and aggression to whole-blood donors., Conclusion: While most platelet donors and plasma donors were motivated by the compensation, those who stated that they would continue to donate without compensation had altruism and aggression scores similar to voluntary whole-blood donors.

Objectives: To assess the reliability and validity of the Functional Assessment of Cancer Therapy-Vulvar (FACT-V)., Methods: Seventy-seven patients treated between January 1996 and January 2001 for cancer of the vulva completed the FACT-V, the Eastern Cooperative Oncology Group Performance Status Rating (ECOG-PSR) and the Hospital Anxiety and Depression Scale (HADS) once, 20 consecutive patients treated between February 2001 and October 2001 completed the questionnaires twice, once before surgery and at 2 months follow-up. The FACT-V scores were compared by patients' performance status, FIGO stage, recurrence, and age, and correlated to the HADS scores. Changes in the FACT-V from baseline to 2 months follow-up were evaluated to establish FACT-V's responsiveness to change., Results: The FACT-V's internal consistency was adequate (Chronbach's alpha range, 0.75 to 0.92). Patients with lower performance status, higher FIGO-stage or recurrent disease received lower FACT-V scores, indicating discriminant validity. The correlation between the FACT-V and the HADS were in the expected direction, indicating convergent and divergent validity. From pre- to post-surgery, scores in nine out of fifteen items of the vulvar cancer-specific subscale improved, while those of five items declined, indicating sensitivity of the vulvar cancer specific items to changes in patients' well-being., Conclusions: The newly developed FACT-V provides a reliable and valid assessment of the quality of life of women with vulvar cancer. It can be used as a short measure of quality of life within research studies, and to facilitate communication about quality of life issues in clinical practice.

This double-blind placebo-controlled study was conducted to determine nicotine effects on diverse types of attentional performance, task load, and mood considering sex effects as suggested by animal studies. Twelve smokers, 12 deprived smokers and 12 nonsmokers (6 females, 6 males in each group) were investigated. Participants were treated either by 5 mg/16 h nicotine patches (Nicorette) or placebo. Effects of treatment were examined by a computerized attention-test battery; mood was assessed by the Berliner-Alltagssprachliches-Stimmungs-Inventar and task load by the NASA Task Load Index (NASA-TLX). Results showed that nicotine significantly increased the number of hits and decreased reaction time (RT) in the vigilance task. In the selective attention task combined with irrelevant speech as background noise, nicotine enhanced rate of hits. Although it was indicated that nicotine leads to a generally higher accuracy in attention tasks, response time of visual search was prolonged, contradicting a universal facilitation by nicotine. Participants experienced mental demand and temporal demand lower and rated alertness higher when in the nicotine condition. These effects were independent of smoking status, indicating "true" nicotine effects. Females took significant advantage of nicotine in the vigilance task, reaching the performance level of males, accompanied by a higher rated alertness. Results indicate task- and sex-dependent nicotine effects.

Background: This study tested a three-item questionnaire to measure global quality of life (QOL) and pain in patients commencing radiotherapy, based on items from the European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 instrument., Patients and Methods: In a pretest, the EORTC QLQ-C30 and the three-item short questionnaire were administered to 100 patients, yielding similar global QOL and pain scores. After the pretest, the three-item questionnaire was administered to 1,837 patients prior to first radiotherapy treatment., Results: 254 (13.8%) patients with impaired QOL were identified. These patients had a mean global QOL score of 32.6 compared to 72.4 (p < 0.001) found in patients with satisfactory QOL. Patients with impaired QOL were also more likely < 60 years and treated for lung, gastrointestinal or head and neck cancer or advanced, metastatic cancer., Conclusion: This brief questionnaire addresses important aspects of QOL, is feasible to use in a clinical setting and therefore represents a potentially useful tool for detecting those patients who may benefit from further evaluation and/or psychosocial support.

System response time (SRT) is suspected to be a stress-inducing factor when searching for information during human-computer interactions. In this study 26 volunteers, grouped into skilled and unskilled Internet users, completed three tasks of searching for information on the Internet, whereupon they rated their strain. Heart rate, nonspecific skin conductance responses, and skin conductance level after SRTs lasting 2, 10, and 22 s were analyzed. Results showed physiological stress responses of higher heart rates and enhanced electrodermal activity related to SRT duration, independent of expertise. For persons experiencing high strain, a higher overall heart rate and a heart rate of 114 beats per minute were observed for the 22-s condition. As no significant effect of expertise on stress response was found, this indicates that no long-term habituation took place. To avoid stress, short SRTs and/or effective coping mechanisms are recommended. The potential application of this research is the suggestion of using a fast Internet connection to reduce the stress response.

Background: Videotaped education materials to teach breast self-examination (BSE) are used worldwide. However, evaluation of videotaped BSE instructions is lacking., Methods: Premenopausal women (mean age 33.4+/-11.2 years) without history of breast cancer were approached to participate in this experimental study and randomly assigned to a video intervention group (VG; n = 130: length of the video = 15 min) or non-video comparison group (NVG; n = 121). All participants answered a questionnaire on BSE behavior and health beliefs. No additional training was given. The total duration of the session including completion of the questionnaire was 15 min for the NVG and 30 min for the VG. Three months later, changes in BSE behavior were compared in the two groups. The influence of health beliefs on actual BSE behavior was investigated as well., Results: Women of both the VG and NVG performed BSE significantly more frequently at follow-up than at baseline. Analysis of covariance, using the baseline BSE-frequency as co-variate and the follow-up BSE frequency as the dependent variable, revealed that women in the VG (adjusted mean = 7.9 times per year, 95%CI = 6.5-9.4) performed BSE more frequently than women of the NVG (adjusted mean = 6.1 times per year, 95%CI = 4.6-7.5) (F = 4.2, df= 2, p = 0.02). Among motivational predictors, having an example of a role model (modeling) was shown by regression analysis to explain the greatest amount of variance (13%) in BSE frequency., Conclusion: Use of an educational videotape increased the frequency of BSE among premenopausal women.

Background: Quality of life (QOL) measures give patients the possibility to express subjective changes in wellbeing. We aimed to translate the radiation specific quality of life questionnaire (QOL-RTI) and the companion head and neck module (H&N) questionnaire into German and to test its reliability, validity and sensitivity., Patients and Methods: After translation and final revisions based on qualitative interviews with ten patients, 97 head and neck cancer patients were screened for eligibility. Patients answered the 38 items questionnaire at baseline and twice in week 4 of radiotherapy for test-retest reliability. Internal consistency was calculated using Chronbach's alpha. Patients also completed the functional assessment of cancer tool plus head and neck (FACT-G plus H&N) for concurrent validity. Item analyses were performed to test the sensitivity., Results: Chronbach's alpha yielded alpha = 0.85 for the QOL-RTI and alpha = 0.80 for the H&N module, test-retest reliability scores were r = 0.87 and r = 0.83, respectively. The correlation of the QOL-RTI plus H&N and the FACT plus H&N was r = 0.79. Questionnaire sensitivity was supported by significant changes in the mean score of 45.8% of the QOL-RTI items and 78.6% of the H&N items between baseline and week 4 of radiotherapy., Conclusions: The German version of the QOL-RTI was shown to be a reliable, valid and sensitive tool to assess the quality of life of patients undergoing radiotherapy. The H&N module is useful for patients undergoing treatment for head and neck cancer.

Empirical studies suggest that an inefficient, negative communication could represent a source of stress in the patient's everyday life and that this kind of communication would also imply chronic migraine. The present study used the "Kategoriensystem für partnerschaftliche Interaktion (KPI)" to determine whether the communication patterns of 12 women with migraine and their partners differed from 12 women with chronic headache and their partners and 12 healthy couples. The communication was video-filmed during the about 10 min lasting interaction in a personally relevant conflict situation. As predicted, women with migraine and their partners made more negative and fewer positive statements than the couples with tension headache and the control dyads. Furthermore, a higher load in female migraine sufferers compared to normal controls was indicated by coping activity.

After-effects of human-computer interaction (HCI) were investigated by using the P300 component of the event-related brain potential (ERP). Forty-nine subjects (naive non-users, beginners, experienced users, programmers) completed three paper/pencil tasks (text editing, solving intelligence test items, filling out a questionnaire on sensation seeking) and three HCI tasks (text editing, executing a tutor program or programming, playing Tetris). The sequence of 7-min tasks was randomized between subjects and balanced between groups. After each experimental condition ERPs were recorded during an acoustic discrimination task at F3, F4, Cz, P3 and P4. Data indicate that: (1) mental after-effects of HCI can be detected by P300 of the ERP; (2) HCI showed in general a reduced amplitude; (3) P300 amplitude varied also with type of task, mainly at F4 where it was smaller after cognitive tasks (intelligence test/programming) and larger after emotion-based tasks (sensation seeking/Tetris); (4) cognitive tasks showed shorter latencies; (5) latencies were widely location-independent (within the range of 356-358 ms at F3, F4, P3 and P4) after executing the tutor program or programming; and (6) all observed after-effects were independent of the user's experience in operating computers and may therefore reflect short-term after-effects only and no structural changes of information processing caused by HCI.

The occurrence of infraslow potential oscillations (ISPOs) of the brain was investigated during a listening and a resting condition in 44 subjects (Ss) with high (HAC) and low ability to concentrate (LAC). The occurrence of ISPOs was found in 36% of the Ss. While in the HAC group the occurrence of ISPOs did not change from listening to resting, in the LAC group Ss with ISPOs were affected by experimental conditions, showing ISPOs during the listening condition. For Ss with ISPOs only during listening a lower score was found for ability to concentrate, suggesting ISPOs as a possible underlying mechanism. For Ss with stable ISPOs a higher I.Q. was found compared to Ss without ISPOs.