Moderators of the relationship between exercise and mood changes: gender,exertion level,and workout duration

Although the role of exercise in improving mood is well established, less is known about moderators of this effect, particularly outside of the laboratory. The current study examined the effect of gender, type of exercise, level of exertion, and duration of workout on the exercise–mood relationship in a naturalistic setting. One hundred and thirty five participants (64 females) either engaged in weight training (n = 52) or cardiovascular (n = 83) exercise. Pre- and post-exercise assessments of mood were collected and changes in two types of mood, negative mood and exhaustion, were examined. Overall, participants reported improved mood after exercise in both domains. Workout duration and level of exertion significantly moderated the relationship of exercise to mood improvement (i.e., an increase in either corresponded to greater improved mood, ps<0.05). Overall, women showed more improved mood than men in the domain of exhaustion (p = 0.001).     

Religion and the body in medical research

Religious discussion of human organs and tissues has concentrated largely on donation for therapeutic purposes. The retrieval and use of human tissue samples in diagnostic, research, and education contexts have, by contrast, received very little direct theological attention. Initially undertaken at the behest of the National Bioethics Advisory Commission, this essay seeks to explore the theological and religious questions embedded in nontherapeutic use of human tissue. It finds that the "donation paradigm" typically invoked in religious discourse to justify uses of the body for therapeutic reasons is inadequate in the context of nontherapeutic research, while the "resource paradigm" implicit in scientific discourse presumes a reductionist account of the body that runs contrary to important religious values about embodiment. The essay proposes a "contribution paradigm" that provides a religious perspective within which research on human tissue can be both justified and limited.     

Entering Prostitution in Adolescence: History of Youth Homelessness Predicts Earlier Entry

The effect of youth homelessness on age of entry into prostitution was tested, controlling for other known covariates using a multivariate model. Women (N = 96) who self-identified as having engaged in prostitution completed cross-sectional standardized questionnaires (M_age = 42.6, SD = 9.18; 62% African American). Women with a history of youth homelessness entered prostitution nearly 8 years earlier than their peers without this history (at 18 vs. 25 years old). Lack of a high school degree or equivalent also predicted an earlier age of entry (at 20 vs. 28 years old). Findings highlight the poverty dynamics that underlie the relationship between early entry into prostitution and homelessness. Young women, living on the street or in shelters, with limited education and employment opportunities, are at high risk of entering prostitution when they are barely out of adolescence. Future research will be better able to design age-specific prevention strategies.     

A pilot study of women’s affective responses to common and uncommon forms of aerobic exercise

Objective: To test the extent to which participants exposed to an uncommon versus common exercise stimulus would result in more favourable affect at post-task.

Design: Experimental design. Participants (N = 120), American women aged 18–45 years, were randomly assigned to complete 30-min of either the uncommon (HOOP; n = 58) or common (WALK; n = 62) exercise stimulus.

Main outcome measures: Self-reported affect and intentions for future exercise were measured before and after the 30-min exercise bout.

Results: Analyses of covariance were run to compare post-task affect across the HOOP and WALK conditions. At post-task, participants assigned to HOOP reported more positively valenced affect, higher ratings of positive activated affect, lower ratings of negative deactivated affect, and stronger intentions for future aerobic exercise compared to participants assigned to WALK.

Conclusions: Participants who completed an uncommon bout of aerobic exercise (HOOP) reported more favourable affect post-exercise, as well as stronger intentions for future exercise, compared to participants who completed a common bout of aerobic exercise (WALK). Future work using a longitudinal design is needed to understand the relationships between familiarity with an exercise stimulus, affective responses to exercise, motivation for future exercise behaviour and exercise maintenance over time.     

A comparison of functional analysis methods of inappropriate mealtime behavior

Investigators have evaluated two procedural variations for conducting a functional analysis of inappropriate mealtime behavior exhibited by children with feeding problems. One method involves prompting bites only in the escape condition (e.g., Najdowski et al., 2008). Another method involves prompting bites across all conditions (e.g., Piazza et al., 2003). We assessed the food refusal of 3 children diagnosed with a feeding disorder by comparing the two variations. The two methods resulted in different outcomes for 2 of 3 children. Prompting bites only in the escape condition identified a single function (i.e., escape). Prompting bites across all conditions identified multiple functions (i.e., escape and attention). We then examined the relative effects of extinction procedures (individually and in combination) to determine the validity of each method. Results of the treatment evaluation suggested that the procedural variation that failed to identify an attention function for 2 of 3 children produced false negative findings.     

Noncontingent and differential reinforcement in the treatment of pediatric feeding problems

We conducted functional analyses of the inappropriate mealtime behavior of 5 children diagnosed with feeding problems. Then, we compared the effects of differential and noncontingent reinforcement, and the relative effects of escape extinction with and without differential or noncontingent reinforcement, when escape extinction appeared necessary. Both reinforcement procedures were effective without escape extinction to treat food refusal for 1 child, but only differential reinforcement was effective without escape extinction to treat the child's liquid refusal. Escape extinction was necessary for 4 of 5 children. The addition of positive reinforcement resulted in beneficial effects (i.e., more stable acceptance, decreased inappropriate mealtime behavior or negative vocalizations) with 3 of 4 children. With escape extinction, differential reinforcement was more effective to treat food refusal for 2 children and noncontingent reinforcement was more effective for 1 child.     

The Influence of Existential Threat and Tolerance Salience on Anti‐Islamic Attitudes in American Politics

Fierce public discussion has centered on anti‐Islamic attitudes and tolerance in America and the West more broadly. The present research explored whether the awareness of mortality (a common theme in politics, e.g., war/terrorism, health care, abortion, and so on) and tolerance salience might influence (1) the endorsement of anti‐Islamic attitudes in American politics and (2) political orientation. Study 1 (n = 79) was conducted in lab and Study 2 (preregistered, n = 396) replicated it online; both obtained the same results. In a neutral‐value‐prime condition, American participants reminded of mortality (vs. control topic) more strongly endorsed a Congressman’s anti‐Islamic statements about Rep. Ellison. However, in a tolerance‐value‐prime condition, participants reminded of mortality maintained their acceptance of Rep. Ellison’s beliefs and practices. Political orientation was not impacted. Implications for terror management theory (TMT), other theories of existential dynamics and motivated conservative political ideology, and both recent and contemporary American politics are discussed.