Calibration of computer-monitored running wheels with adjustable drag

The design of a rodent running wheel with adjustable drag and ability to measure accurately the direction as well as the speed of running is described. A computer program in the C language enables a single microcomputer to monitor several wheels simultaneously. Drag is conveniently calibrated by the rate of deceleration from 1 revolution per second when no animal is present, and the calibration procedure can also assess the smoothness of the drag mechanism. Results of tests of the setability, repeatablility, and durability of the drag are presented. A method is outlined to determine the physical work required to accelerate the wheel and to maintain its rotation against the frictional drag.     

Social Structures and the Ontology of Social Groups

Social groups—like teams, committees, gender groups, and racial groups—play a central role in our lives and in philosophical inquiry. Here I develop and motivate a structuralist ontology of social groups centered on social structures (i.e., networks of relations that are constitutively dependent on social factors). The view delivers a picture that encompasses a diverse range of social groups, while maintaining important metaphysical and normative distinctions between groups of different kinds. It also meets the constraint that not every arbitrary collection of people is a social group. In addition, the framework provides resources for developing a broader structuralist view in social ontology.     

On the predictive validity of behavioral momentum theory for mitigating resurgence of problem behavior

We summarize the results of four recent translational studies from our lab that used the predictions of behavioral momentum theory to inform the development of more durable treatments for destructive behavior. Treatments informed by behavioral momentum theory generally showed better suppression of target responding during an extinction challenge than did a comparison treatment. We reanalyze data from each of the four studies to show that this general finding is apparent both at the aggregate (i.e., proportion of baseline response rates averaged across participants) and within participant (i.e., percentage reduction in proportion of baseline response rates, difference in raw response rates during the extinction challenge). Interestingly, participants who experienced multiple cycles of the extinction challenge generally showed less differentiation in target responding between the treatment informed by behavioral momentum theory and the comparison treatment. Overall results suggest that applications of behavioral momentum theory can substantially improve the durability of common treatments for destructive behavior.     

“'Cause You Can't Play This by Yourself”: Athletes' Perceptions of Team Influence on Their Precompetitive Psychological States

Although correlational studies indicate that team attributes are related to athletes' precompetitive psychological states, it is unknown how team members experience these relationships. The present study's purpose was to investigate athletes' perceptions of precompetitive team influence. Consequently, we worked from a constructivist realist position and used qualitative methods (interviews with competitive team-sport athletes). An inductive content analysis revealed that athletes perceived established and novel team characteristics and processes to influence their precompetitive psychological states. Athletes perceived these influences as both adaptive and maladaptive, and it appeared that they were qualified by contextual factors as well as intuitive regulatory attempts.     

How do Relationship Stability and Quality Affect Wellbeing?: Romantic Relationship Trajectories,Depressive Symptoms,and Life Satisfaction across 30 Years

Lifecourse theory scholars focus on how individuals traverse social roles, such as marriage, parenthood, and employment, in similar and different ways across their lives. This study examined one specific role trajectory: romantic relationships. This study examined men’s and women’s (N?=?3617) relationship status and quality across approximately 30 years. Using second-order latent class analysis, results showed four predominant relationship role trajectories: (a) Multiple Transitions, (b) Stable Marriage with High Conflict, (c) Stable Marriage with High Satisfaction, and (d) Marriage to Divorce/cohabitation. These relationship role trajectories differed on two aspects of quality of life: life satisfaction and depressive symptoms. Individuals in the Multiple Transitions trajectory consistently reported poorest quality of life; however, those in the Multiple Transitions and Stable Marriage with High Conflict trajectories were the only that reported decreases in depressive symptoms over 30 years. Relationship satisfaction poorly differentiated the trajectories compared to relationship conflict and stability.     

Special Considerations in the Adaptation of Cognitive Behavioral Therapy for Insomnia With Active-Duty U.S. Army Personnel

Insomnia is highly prevalent among active-duty military service members. Cognitive Behavioral Therapy for Insomnia (CBT-I) is a well-established and effective treatment; however, research and treatment recommendations have primarily focused on civilian or veteran populations. A multitude of military-specific factors directly impact service members’ sleep and the subsequent treatment recommendations. This article provides treatment considerations for the use of CBT-I with active-duty U.S. Army personnel. First, an overview of the theoretical model of insomnia, including military-specific predisposing, precipitating, and perpetuating factors, is presented, followed by a review of common comorbid conditions among service members with insomnia. Finally, discussion focuses on considerations and strategies for implementing components of CBT-I with service members, managing sleep during deployments, and adjusting sleep to accommodate overnight duties. Additional training resources and supplemental video examples (with actors) are provided.     

Instrumental learning and cognitive flexibility processes are impaired in children exposed to early life stress

Children who experience severe early life stress show persistent deficits in many aspects of cognitive and social adaptation. Early stress might be associated with these broad changes in functioning because it impairs general learning mechanisms. To explore this possibility, we examined whether individuals who experienced abusive caregiving in childhood had difficulties with instrumental learning and/or cognitive flexibility as adolescents. Fifty‐three 14–17‐year‐old adolescents (31 exposed to high levels of childhood stress, 22 control) completed an fMRI task that required them to first learn associations in the environment and then update those pairings. Adolescents with histories of early life stress eventually learned to pair stimuli with both positive and negative outcomes, but did so more slowly than their peers. Furthermore, these stress‐exposed adolescents showed markedly impaired cognitive flexibility; they were less able than their peers to update those pairings when the contingencies changed. These learning problems were reflected in abnormal activity in learning‐ and attention‐related brain circuitry. Both altered patterns of learning and neural activation were associated with the severity of lifetime stress that the adolescents had experienced. Taken together, the results of this experiment suggest that basic learning processes are impaired in adolescents exposed to early life stress. These general learning mechanisms may help explain the emergence of social problems observed in these individuals.