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Objectives: This study explored the relationships between marijuana knowledge, confidence in knowledge, and information efficacy and marijuana use. Furthermore, the effects of the knowledge-related variables were examined on intention to use, resistance efficacy, and intention to vote for legalization. Participants: Undergraduate students (N = 215) were surveyed in Fall 2018. Methods: Data were collected online and analyzed through a series of regression analyses. Results: Higher knowledge was related to less use via higher perceived risk whereas higher confidence in knowledge was related to more use. Marijuana use was related to higher future intention to use, lower resistance self-efficacy, and intention to vote for legalization. Information efficacy was related to intention to vote for legalization only. Conclusions: Students with more knowledge were less likely to use marijuana, whereas students who considered themselves well-informed were more likely to use it. Future intervention efforts will benefit from counteracting students' misplaced confidence in their knowledge.

Patient-centered care and healthcare consumerism are dominant models of the patient-provider relationship. Positioning theory was applied to examine consumers’ and physicians’ positions on patient-centered care and healthcare consumerism, along with their attitudes toward direct-to-consumer healthcare service advertising and trust in the medical profession. Surveys were conducted with a convenience sample of consumers and physicians respectively. Patient-centered care was the only theoretical construct that both consumers and physicians unequivocally embraced. Both groups were either ambivalent or skeptical of the other three concepts. Between the two groups, physicians exhibited a stronger endorsement of patient-centered care and more negative attitudes toward advertising than consumers. When the relationships among the theoretical constructs were examined, a negative correlation between patient-centered care and consumerism was found among consumers. Also, patient-centered care and trust were negatively correlated in both groups. Implications of these findings are discussed for strategic communication, consumer and physician education, and future research. [ABSTRACT FROM AUTHOR]

A pilot study was conducted to develop a marijuana knowledge scale and test feasibility of an information literacy-focused intervention targeting college students. First, students recruited from four classes completed an online survey measuring knowledge, attitudes, and intention to use marijuana and the responses (n = 117) were used to create a 19-item knowledge scale. Subsequently, one-hour group intervention was delivered in two of the four classes and volunteers among them completed a post-test (n = 34). The results showed that the intervention increased knowledge and decreased peer approval. Knowledge gain was higher among those with lower initial confidence in their knowledge. No direct effects were found on risk or intention to use.

The high anatomical contrast achieved with the newly emerging MRI tractographic technique of super-resolution track density imaging (TDI) encouraged us to search for a new fiber tract in the septum pellucidum. Although this septum pellucidum tract (SPT) has been observed previously, its connections were unclear due to ambiguity and limited resolution of conventional MRI images. It is now possible to identify detailed parts of SPT with the increased resolution of TDI, which involves diffusion MRI imaging, whole-brain tractography, and voxel subdivision using the track-count information. Four healthy male subjects were included in the study. The experiment was performed with 7.0T MRI, following the guidelines of the institute's institutional review board. Data were processed with the super-resolution TDI technique to generate a tractographic map with 0.18 mm isotropic resolution. The SPT was identified in all subjects. Based on additional seed tracking method with inter-axis correlation search, we have succeeded in identifying a new frontal lobe pathway in the SPT. We hypothesize that the tract is connected as a superior dorsal branch of the fornix that leads to the prefrontal cortex.

Marijuana use among U.S. college students is the highest since the mid-1980s. Because knowledge about marijuana and confidence in the knowledge are related to changing marijuana laws and marijuana-related messages ubiquitous in college students' information environment, we examined their relationships with use. The Structural Equation Modeling method was used to analyze the relationships using survey responses from 249 college students in an adult-use marijuana legal state. Marijuana health knowledge was related to less use, and law knowledge was related to more use. Both relationships were mediated by perceived risk. Confidence in knowledge was related to more use directly as well as indirectly via lower peer disapproval and lower perceived risk. Among various marijuana message channels, peers were the most influential, contributing to lower health knowledge and higher confidence in knowledge. [ABSTRACT FROM AUTHOR]

Direct-to-consumer advertisements for healthcare services constitute a rare channel of public communication where consumers see and hear directly from their local providers and healthcare organizations. Although spending on these advertisements has increased drastically during the past decades, research on their content and effects remains rare. To fill this gap, we analyzed primetime television advertisements for healthcare services directly targeting consumers. The advertisements were collected from the two largest media markets in Nevada for one month. In total, 795 advertisements were identified, and 106 of them were non-duplicates. Analysis revealed that the advertisements focused on patients' good health outcomes by showing them smiling, going out and about, having fun with others, and enjoying rigorous physical activities. On the other hand, the advertisements focused less on the providers. Although the advertisements often showed providers in clinical settings, basic information about their professional degrees was often missing. Mentions of providers' other qualifications and professional experiences were even scarcer. Also, a substantial number of advertisements failed to show providers interacting with patients. Additional analysis of patient and provider characteristics revealed under-representation of racial or ethnic minority and older adult patients. Representation of women and minorities as providers was even more uncommon. We discussed the implications of these findings from the perspective of patient expectation and made suggestions to help providers improve their direct-to-consumer advertisements. [ABSTRACT FROM AUTHOR]

This study explored an intervention of body image disturbance by employing short educational messages. A public service announcement (PSA) comprised of a realistic body image photo and a text emphasizing genetic diversity of body types improved young women's body satisfaction, although it did not affect the size of ideal female-body norm. A variation of the PSA, an alignment ad, generated a similarly positive effect on body satisfaction. The alignment ad, in comparison to a control, also increased the size of ideal female-body norm. At the same time, these positive main effects were mostly due to the gains in body satisfaction and the size of ideal female-body norm by women whose body satisfaction was relatively undamaged to begin with. For women who were already suffering from low body satisfaction, the educational messages interacted with the predisposition to further deteriorate body satisfaction and the norm of ideal female body. Theoretical implications of these effects were discussed and practical suggestions were made for healthy body image advocates. Keywords: body image; eating disorders; intervention, educational campaign

Gender differences in the risk and protective factors of marijuana use among college students were explored by analyzing online survey responses from 464 undergraduates. Women perceived higher risk and used marijuana less than men, with no gender difference in peer disapproval. In addition, women had higher objective knowledge regarding the health effects of marijuana, although they exhibited lower confidence in their knowledge. In subsequent regression analyses, health knowledge, confidence in knowledge, perceived risk, and peer disapproval predicted women's marijuana use, whereas only confidence in knowledge and perceived risk predicted men's use. These findings can help devise effective intervention strategies. [ABSTRACT FROM AUTHOR]

This study investigated the effect of magazine use on the desire to be thin within the theoretical framework of presumed influence. Structural equation modeling supported the hypothesis that reading beauty and fashion magazines increased the drive for thinness both directly and indirectly. The indirect pathway included the perceived prevalence of the thin ideal in mass media, the presumed influence of the thin ideal on others, and the perceived influence of the thin ideal on self Social pressure to be thin may be based both on reality and the presumption of influence on others. Results suggest potential strategies for intervention. Keywords: body image; eating disorders; presumed media influence