Essential kinematic information,athletic experience,and affordance perception for others

The present study investigated the role of different types of movement in affordance perception, as well as the influence of sports experience. Perception of another actor’s maximum vertical jumping height and horizontal long-jumping distance was evaluated for basketball players, soccer players, and nonplayer controls after viewing point-light representations of the actors’ movements. Perceptual reports were more accurate after jumping-related movements (walking and squatting) were viewed than after nonrelated movements (standing and twisting). Vertical jump reports were more accurate than horizontal jump reports. Basketball and soccer players demonstrated higher accuracy than did controls. This research establishes that point-light displays contain essential kinematic information sufficient to support accurate affordance perception, and athletes appear better attuned to kinematic information specifying affordances for others as a result of their sports experience.     

Positive affect and learning: exploring the “Eureka Effect” in dogs

Animals may experience positive affective states in response to their own achievements. We investigated emotional responses to problem-solving in dogs, separating these from reactions to rewards per se using a yoked control design. We also questioned whether the intensity of reaction would vary with reward type. We examined the response (behavior and heart rate) of dogs as they learned to gain access to different rewards: (1) food (2) human contact, and (3) dog contact. Twelve beagles were assigned to matched pairs, and each dog served as both an experimental and a control animal during different stages of the experiment. We trained all dogs to perform distinct operant tasks and exposed them to additional devices to which they were not trained. Later, dogs were tested in a new context. When acting as an experimental dog, access to the reward was granted immediately upon completion of trained operant tasks. When acting as a control, access to the reward was independent of the dog’s actions and was instead granted after a delay equal to their matched partner’s latency to complete their task. Thus, differences between the two situations could be attributed to experimental dogs having the opportunity to learn to control access to the reward. Experimental dogs showed signs of excitement (e.g., increased tail wagging and activity) in response to their achievements, whereas controls showed signs of frustration (e.g., chewing of the operant device) in response to the unpredictability of the situation. The intensity of emotional response in experimental dogs was influenced by the reward type, i.e., greatest response to food and least to another dog. Our results suggest that dogs react emotionally to problem-solving opportunities and that tail wagging may be a useful indicator of positive affective states in dogs.     

Bullies,blades, and barricades: Practical considerations for working with adolescents expressing concerns regarding gender and identity

ABSTRACT

Background: Adolescents, by their very nature and need for maturity, struggle with issues of the self and identity, while challenging the very systems that are there to support them. However, gender diverse adolescents may become detached and overwhelmed as a trans identity solidifies during this time. Bullies, blades and barricades describes the challenges, hardship and dispossession that some gender diverse adolescents face from interpersonal and intrapersonal conflicts, societal pressure and hostility.

Method: This paper utilizes the current research on safety and risks affecting trans youth, the authors clinical experience of trans and gender diverse adolescents, and recommendations in the literature for professional care and support of gender diverse adolescents to identify the various ways gender diverse adolescents are negatively affected by their experiences.

Results: Bullying is not limited to school or peer environments and may be present in adolescents' homes, in local communities, in professional services or from sources of information such as the media. The physical dangers gender diverse adolescents face may arise from victimization, violence or rejection, or self-harming behaviors due to negative beliefs, fear or frustration. Barriers preventing disclosure and expression of gender and/or identity may stem from negative experiences, rejection, pubertal changes, imposed limitations, dependence upon school, home or legal environments, or other spheres of influence.

Discussion: Affirmative approaches, individual focus, recognition of family dynamics, inclusion of significant others, advocacy in school and local community environments as well as professional training are the most commonly recommended interventions. This paper provides an inclusive review of the myriad of challenges confronting gender diverse adolescents including often unrecognized forms of pressure, oppression and restrictions. This paper aims to support clinicians by contextualizing the adversity that gender diverse adolescents face and offers strategies for engagement and intervention.     

Toward a contemporary quantitative model of punishment

A direct‐suppression, or subtractive, model of punishment has been supported as the qualitatively and quantitatively superior matching law‐based punishment model (Critchfield, Paletz, MacAleese, & Newland, 2003; de Villiers, 1980; Farley, 1980). However, this conclusion was made without testing the model against its predecessors, including the original (Herrnstein, 1961) and generalized (Baum, 1974) matching laws, which have different numbers of parameters. To rectify this issue, we reanalyzed a set of data collected by Critchfield et al. (2003) using information theoretic model selection criteria. We found that the most advanced version of the direct‐suppression model (Critchfield et al., 2003) does not convincingly outperform the generalized matching law, an account that does not include punishment rates in its prediction of behavior allocation. We hypothesize that this failure to outperform the generalized matching law is due to significant theoretical shortcomings in model development. To address these shortcomings, we present a list of requirements that all punishment models should satisfy. The requirements include formal statements of flexibility, efficiency, and adherence to theory. We compare all past punishment models to the items on this list through algebraic arguments and model selection criteria. None of the models presented in the literature thus far meets all of the requirements.     

Variability and Determinism in Motor Behavior

In investigations into perception-action systems, variability of observable behavior may be considered to (a) interfere with inquiry, (b) be neither detrimental nor particularly useful to inquiry, or (c) play a crucial role in inquiry. The authors underscore recent suggestions that alternative (c) is a preferred strategy for the study of many motor behaviors. In tutorial fashion, the authors review the concepts of variability and determinism with respect to postural and rhythmic movements. Study of the variability of those behaviors has revealed crucial features suggestive of underlying mechanisms and control, such as particular blends of noise and determinism (piecewise determinism). It has also revealed general lessons (for example, more variable does not mean more random and more controllable does not mean more deterministic) that may extend to other classes of perceptual-motor behavior.     

Derivation and Implications of MMPI Cluster Groups in Clinically Depressed Inpatient Females

The purpose of this study was to subclassify clinically depressed patients based on a cluster-analytic examination of the MMPI. Subjects were 79 female inpatients with major depression. A cluster analysis of the MMPI validity and clinical scales resulted in three clusters labeled psychotic (287 MMPI profile), hostile (24 MMPI profile), and histrionic (32 MMPI profile) depression. The psychotic group exhibited the greatest depression as measured by the Beck Depression Inventory (BDI). The psychotic and hostile groups, however, did not differ on other associated aspects of depression, such as negative cognitions, nonassertiveness, or personality style. The hostile group reported the fewest physical difficulties and the most excessive alcohol use. The groups, however, did not differ on other aspects of depression history or presentation such as family history of depression or previous hospitalizations. A repeated measures ANOVA for the three cluster groups on the BDI at admission, discharge, and 6 months after discharge indicated that all groups showed improvement at discharge but that only the hostile depressive group continued to show improvement at the 6-month follow-up.     

Effects of a Peer Engagement Program on Socially Withdrawn Children with a History of Maltreatment

Children with a history of child maltreatment often have limited social interactions with other children and adults. This study examined the effects of a Peer Engagement Program, consisting of peer mentoring and social skills training with positive reinforcement, in three children with low levels of oral and social interaction. A multiple baseline, single-subject research design was used to test whether introduction of the intervention was associated with increased, directly observed oral interaction and engagement in social activities with peers and adults. The Child Behavior Checklist (CBCL) and the Social Skills Rating Scale (SSRS) were administered before and after intervention. All children showed increased levels of oral and social interaction and improved scores on the SSRS and the CBCL.     

Two for the Price of One: Assessment Center Training to Focus on Behaviors Can Transfer to Performance Appraisals

The purpose of this study was to evaluate whether the training and experience of assessors to record behaviors as part of an actual organizational assessment center (AC) would transfer to another context: performance appraisals. Specifically, we examined the effects of transfer of training on managers' behavioral specificity in comments on performance evaluations. Performance appraisal comments from managers who had received training and participated as an assessor and from managers who had not were compared. Analyses revealed significant differences between managers who were trained as assessors compared with managers who were not, suggesting transfer of training effects. Results provide the first empirical evidence for an added benefit of AC assessor participation and training.