Self-motion perception during locomotor recalibration: more than meets the eye

Do locomotor aftereffects depend specifically on visual feedback? In 7 experiments, 116 college students were tested, with closed eyes, at stationary running or at walking to a previewed target after adaptation, with closed eyes, to treadmill locomotion. Subjects showed faster inadvertent drift during stationary running and increased distance (overshoot) when walking to a target. Overshoot seemed to saturate (i.e., reach a ceiling) at 17% after as little as 1 min of adaptation. Sidestepping at test reduced overshoot, suggesting motor specificity. But inadvertent drift effects were decreased if the eyes were open and the treadmill was drawn through the environment during adaptation, indicating that these effects involve self-motion perception. Differences in expression of inadvertent drift and of overshoot after adaptation to treadmill locomotion may have been due to different sets of ancillary cues available for the 2 tasks. Self-motion perception is multimodal.     

Disparities in access to family physicians among transgender people in Ontario,Canada

Background: Informed by the Gelberg-Andersen behavioral model for vulnerable populations, this study examined the prevalence of and factors associated with not having a family physician among transgender (trans) people in Ontario, Canada.

Methods: Data were drawn from a respondent-driven sampling (RDS) survey of trans Ontarians age 16 and above (n = 433) conducted between 2009 and 2010. All analyses were weighted using RDS II methods. Prevalence ratios were estimated using average marginal predictions from logistic regression models.

Results: An estimated 17.2% (95% CI, 11.0 to 22.9) of trans Ontarians (median age = 28.7, 77.3% White) did not have a regular family physician. In multivariable analyses accounting for other predisposing and need-related factors, transfeminine persons (trans women and non-binary persons assigned a male sex at birth) who were Indigenous and/or persons of color were less likely than other transfeminine persons to have a family doctor. In addition, trans persons who were homeless or had unstable housing were less likely to have a family doctor than those who were adequately housed.

Conclusions: These results provide the first quantitative evidence of health disparities by race and gender within a Canadian transgender population and suggest a social gradient in access to care within Ontario's “universal health insurance” system.     

童年中期儿童社交地位、社交自我知觉与孤独感的关系研究

以554名3～6年级的小学生为被试,采用量表法、同伴提名法探讨童年中期儿童社交地位、社交自我知觉与孤独感的关系。结果表明:(1)3～6年级小学生的孤独感有显著的性别差异,男生的孤独感显著高于女生。(2)不同社交地位的儿童其孤独感也不同,低接纳组儿童的孤独感显著高于一般接纳组和高接纳组,而一般接纳组与高接纳组儿童的孤独感差异不显著。(3)在高接纳组儿童中,社交自我知觉消极的儿童其孤独感显著高于社交自我知觉一般的儿童,社交自我知觉一般的儿童其孤独感显著高于社交自我知觉积极的儿童;但是在一般接纳组和低接纳组中,社交自我知觉不同的儿童其孤独感并没有显著差异。     

Identifying careless responses in questionnaire research: a serendipitous finding

The present study describes a possible method by which potentially meaningless responses to questionnaires can be easily identified. Given an inadvertent mistake in the design of a questionnaire packet, we found that 10% of respondents provided invalid responses to items.     

Clinician Perspectives of Diagnosis and Perceived Client Change in “Real World” Psychotherapy for Youth Emotional and Behavioral Disorders

We investigated the extent to which clinician-assigned diagnoses of emotional and behavioral disorders and clinicians’ perceptions of client change are consistent with structured measures of youth clinical functioning and parent/family characteristics within the context of usual care or “real world” psychotherapy. A total of 54 therapists from two publicly-funded youth outpatient mental health clinics and 128 youths and parents from the therapists’ combined caseloads were included in the study. Clinician-assigned diagnosis and youth and family demographics were collected at the initial visit, clinician-reported perceived client change was collected at 6-month follow-up, and structured measures of youth clinical functioning and parent/family characteristics were collected at both time points. Results indicate some overlap between clinician-assigned diagnosis, clinician-reported perceived client change, and structured measures of youth clinical functioning and parent/family characteristics after controlling for demographic factors. Results are discussed in terms of implications for the implementation of evidence-based practices in real world community settings.     

Chimpanzees demonstrate individual differences in social information use

Studies of transmission biases in social learning have greatly informed our understanding of how behaviour patterns may diffuse through animal populations, yet within-species inter-individual variation in social information use has received little attention and remains poorly understood. We have addressed this question by examining individual performances across multiple experiments with the same population of primates. We compiled a dataset spanning 16 social learning studies (26 experimental conditions) carried out at the same study site over a 12-year period, incorporating a total of 167 chimpanzees. We applied a binary scoring system to code each participant’s performance in each study according to whether they demonstrated evidence of using social information from conspecifics to solve the experimental task or not (Social Information Score—‘SIS’). Bayesian binomial mixed effects models were then used to estimate the extent to which individual differences influenced SIS, together with any effects of sex, rearing history, age, prior involvement in research and task type on SIS. An estimate of repeatability found that approximately half of the variance in SIS was accounted for by individual identity, indicating that individual differences play a critical role in the social learning behaviour of chimpanzees. According to the model that best fit the data, females were, depending on their rearing history, 15–24% more likely to use social information to solve experimental tasks than males. However, there was no strong evidence of an effect of age or research experience, and pedigree records indicated that SIS was not a strongly heritable trait. Our study offers a novel, transferable method for the study of individual differences in social learning.     

The role of stranger harassment experiences in college women's perceived possibility of gender crimes happening to them

The present study examined the relation between stranger harassment experiences and college women's perceived possibility of gender and nongender crimes happening to them. Undergraduate women attending a British university completed self‐report measures of stranger harassment and self‐objectification (i.e., self‐surveillance and body shame), and then evaluated four vignettes of various crimes on the severity of the crime and the likelihood of the crime happening to them. Results indicated that stranger harassment is a common experience for these British university women. Serial mediation analyses revealed a direct effect of stranger harassment on perceived likelihood of rape and perceived likelihood of intimate partner violence, and an indirect effect of stranger harassment on rape through self‐surveillance, whereas stranger harassment and indices of self‐objectification were unrelated to perceived likelihood of human trafficking and burglary. Discussion is centered on the role of objectifying experiences in perceptions of gender crimes where sexual and physical harm to women's bodies is emphasized, and the potential impact for those women on the receiving end of unwanted sexual objectification.     

Maternal employment and children's achievement in context: a meta-analysis of four decades of research

This meta-analysis of 68 studies (770 effect sizes) used random effects models to examine whether children's achievement differed depending on whether their mothers were employed. Four achievement outcomes were emphasized: formal tests of achievement and intellectual functioning, grades, and teacher ratings of cognitive competence. When all employment was compared with nonemployment for combined and separate achievement outcomes without moderators, effects were nonsignificant. Small beneficial effects of part-time compared with full-time employment were apparent for all achievement outcomes combined and for each individual achievement outcome. Significant sample-level moderators of the associations between maternal employment and achievement for all outcomes combined included family structure, race/ethnicity, and socioeconomic status; associations were positive when samples were majority 1-parent families and mixed 1- and 2-parent families, racially/ethnically diverse or international in composition, and not middle-upper class. Analyses of child gender indicated more positive effects for girls. Children's age was a significant moderator for the outcome of intellectual functioning. The identification of sample-level moderators of the relationship between maternal employment and children's achievement highlights the importance of social context in understanding work-family linkages.     

The neural bases of distracter-resistant working memory

A major difference between humans and other animals is our capacity to maintain information in working memory (WM) while performing secondary tasks, which enables sustained, complex cognition. A common assumption is that the lateral prefrontal cortex (PFC) is critical for WM performance in the presence of distracters, but direct evidence is scarce. We assessed the relationship between fMRI activity and WM performance within subjects, with performance matched across distracter and no-distracter conditions. Activity in the ventrolateral PFC during WM encoding and maintenance positively predicted performance in both conditions, whereas activity in the presupplementary motor area (pre-SMA) predicted performance only under distraction. Other parts of the dorsolateral and ventrolateral PFCs predicted performance only in the no-distracter condition. These findings challenge a lateral-PFC-centered view of distracter resistance, and suggest that the lateral PFC supports a type of WM representation that is efficient for dealing with task-irrelevant input but is, nonetheless, easily disrupted by dual-task demands.