Three stimuli for visual motion perception compared

Two arrangements yielding induced motion were used to explore the relative effectiveness of three stimulus conditions known to produce perception of motion—namely, image displacement, ocular pursuit, and object-relative displacement. In these arrangements, object-relative displacement, which resulted in induced motion, was in conflict either with ocular pursuit or with image displacement. The outcomes of these conflicts were determined by measuring the extent of induced motion. Image displacement proved more effective in competing with object-relative displacement than did ocular pursuit, which in one arrangement yielded to object-relative displacement entirely. The same pattern of results was obtained both with the usual arrangement of the moving-center type and with a stationary-center display.     

Agonistic screams in wild chimpanzees (Pan troglodytes schweinfurthii) vary as a function of social role

Some nonhuman primates have demonstrated the capacity to communicate about external objects or events, suggesting primate vocalizations can function as referential signals. However, there is little convincing evidence for functionally referential communication in any great ape species. Here, the authors demonstrate that wild chimpanzees (Pan troglodytes schweinfurthii) of Budongo forest, Uganda, give acoustically distinct screams during agonistic interactions depending on the role they play in a conflict. The authors analyzed the acoustic structure of screams of 14 individuals, in the role of both aggressor and victim. The authors found consistent differences in the acoustic structure of the screams, across individuals, depending on the social role the individual played during the conflict. The authors propose that these 2 distinct scream variants, produced by victims and aggressors during agonistic interactions, may be promising candidates for functioning as referential signals.     

Chronic illness and COVID-19-related risk and protective behaviors

People with chronic illnesses are at increased risk of contracting COVID-19. Still, little is known about whether such an increased risk relates to COVID-19-related protective behaviors among those with chronic illness. This study compares the self-reported COVID-19 risky and protective behaviors—specifically physically distancing, handwashing, and having houseguests—of people (N = 936) (1) living with chronic illnesses or (2) cohabiting with someone with chronic illness to those who fall in neither category at the beginning of the COVID-19 pandemic (April 2020). Study results were mixed: people with a chronic illness were more likely to have had houseguests in the past 5 days and less likely to have increased their handwashing in response to the pandemic, but were also more likely to physical distance when outside the home. Those cohabiting with someone with a chronic illness were more likely to have had houseguests, but did not differ in other outcomes.     

TEACHING SELECTED MICROCOMPUTER SKILLS TO RETARDED STUDENTS VIA PICTURE PROMPTS

Five retarded students were taught to use picture prompts to help them access and terminate a microcomputer program. Training was provided within a multiple baseline format. Posttesting (picture prompts without feedback), and a return to baseline were later conducted for boththe training program and an untrained (generalization) program. The results indicate thatthe program was successful in teachingthe microcomputer skills tothe students. In addition, all students were able to maintain their skills over a 7-day interval in which they did not have access tothe microcomputer.     

An analysis of modifications to the three-step guided compliance procedure necessary to achieve compliance among preschool children

After a 3‐step guided compliance procedure (vocal prompt, vocal plus model prompt, vocal prompt plus physical guidance) did not increase compliance, we evaluated 2 modifications with 4 preschool children who exhibited noncompliance. The first modification consisted of omission of the model prompt, and the second modification consisted of omitting the model prompt and decreasing the interprompt interval from 10 s to 5 s. Each of the modifications effectively increased compliance for 1 participant. For the remaining 2 participants, neither modification was effective; differential reinforcement in the form of contingent access to a preferred edible item was necessary to increase compliance. Problem behavior varied across participants, but was generally higher during guided compliance conditions and lower during differential reinforcement conditions.     

Emotion Dysregulation as a Mechanism Linking Stress Exposure to Adolescent Aggressive Behavior

Exposure to stress is associated with a wide range of internalizing and externalizing problems in adolescents, including aggressive behavior. Extant research examining mechanisms underlying the associations between stress and youth aggression has consistently identified social information processing pathways that are disrupted by exposure to violence and increase risk of aggressive behavior. In the current study, we use longitudinal data to examine emotion dysregulation as a potential mechanism linking a broader range of stressful experiences to aggressive behavior in a diverse sample of early adolescents (N?=?1065). Specifically, we examined the longitudinal associations of peer victimization and stressful life events with emotion dysregulation and aggressive behavior. Structural equation modeling was used to create latent constructs of emotion dysregulation and aggression. Both stressful life events and peer victimization predicted subsequent increases in emotion dysregulation over a 4-month period. These increases in emotion dysregulation, in turn, were associated with increases in aggression over the subsequent 3?months. Longitudinal mediation models showed that emotion dysregulation mediated the relationship of both peer victimization (z?=?2.35, p?=?0.019) and stressful life events (z?=?2.32, p?=?0.020) with aggressive behavior. Increasing the use of adaptive emotion regulation strategies is an important target for interventions aimed at preventing the onset of adolescent aggressive behavior.     

Throwing light on the dark side of personality: Reinforcement sensitivity theory and primary/secondary psychopathy in a student population

In a student sample, we examined two major issues in relation to primary/secondary subtypes of psychopathy and the reinforcement sensitivity theory of personality: the roles played by (a) fear (related to the fight-flight-freeze system, FFFS) and anxiety (related to the behavioural inhibition system, BIS), and (b) different aspects of the behavioural approach system (BAS). Largely consistent with Corr’s (2010a) proposal concerning the neuropsychological deficits associated with the psychoticism-psychopathy continuum, results confirmed that low BIS activity was associated with both primary and secondary psychopathy; whereas low FFFS activity was associated with only primary psychopathy. In relation to the BAS, reward sensitivity and drive were positively related to primary psychopathy; whereas Fun Seeking was negatively related to primary psychopathy but positively related to secondary psychopathy. These results represent a more nuanced picture of FFFS/BIS/BAS and dispositional psychopathy in a student sample. Specifically, they challenge the view that low BIS is preferentially associated with primary psychopathy and a high BAS is preferentially associated with secondary psychopathy. Further work is needed to confirm that these findings extend to clinical and forensic psychopathy populations.     

Multiple endorsers and multiple endorsements: The influence of message repetition,source congruence and involvement on brand attitudes

This paper investigates the effects of source congruence on brand attitudes in two situations: multiple brand endorsements by one celebrity and multiple celebrity endorsers of one brand. Under low involvement conditions, brand attitudes become more negative as a celebrity endorses multiple brands and more favorable with multiple endorsers. In high involvement conditions, strong source congruence overrides the negative effect of multiple brands, and the positive effect of multiple endorsers is found only with strong congruence. We interpret these results as suggestive of a frequency knowledge cue that dominates under low involvement but is non-diagnostic in high involvement scenarios.