Prospective memory and frontal lobe function

The study sought to examine the role of frontal lobe functioning in focal prospective memory (PM) performance and its relation to PM deficit in older adults. PM and working memory (WM) differences were studied in younger aged (n = 21), older aged (n = 20), and frontal injury (n = 14) groups. An event-based focal PM task was employed and three measures of WM were administered. The younger aged group differed from the other two groups in showing significantly higher scores on PM and on one of the WM measures, but there were no differences at a statistically significant level between the older aged group and the frontal injury groups on any of the memory measures. There were, however, some differences in correlations with a WM measure between groups. It is concluded that there are similarities and differences in the deficits in PM between older adults and patients with frontal lobe injury on focal as well as nonfocal PM tasks.     

Characterization of the discriminative stimulus effects of lorcaserin in rats

Lorcaserin is approved by the Food and Drug Administration for treating obesity and is under consideration for treating substance use disorders; it has agonist properties at serotonin (5‐HT)_2C receptors and might also have agonist properties at other 5‐HT receptor subtypes. This study used drug discrimination to investigate the mechanism(s) of action of lorcaserin. Male Sprague–Dawley rats discriminated 0.56 mg/kg i.p. lorcaserin from saline while responding under a fixed‐ratio 5 schedule for food. Lorcaserin (0.178‐1.0 mg/kg) dose‐dependently increased lorcaserin‐lever responding. The 5‐HT_2C receptor agonist mCPP and the 5‐HT_2A receptor agonist DOM each occasioned greater than 90% lorcaserin‐lever responding in seven of eight rats. The 5‐HT_1A receptor agonist 8‐OH‐DPAT occasioned greater than 90% lorcaserin‐lever responding in four of seven rats. The 5‐HT_2C receptor selective antagonist SB 242084 attenuated lorcaserin‐lever responding in all eight rats and the 5‐HT_2A receptor selective antagonist MDL 100907 attenuated lorcaserin‐lever responding in six of seven rats. These results suggest that, in addition to agonist properties at 5‐HT_2C receptors, lorcaserin also has agonist properties at 5‐HT_2A and 5‐HT_1A receptors. Because some drugs with 5‐HT_2A receptor agonist properties are abused, it is important to fully characterize the behavioral effects of lorcaserin while considering its potential for treating substance use disorders.     

Assessing the role of alternative response rates and reinforcer rates in resistance to extinction of target responding when combining stimuli

Studies of behavioral momentum reveal that reinforcing an alternative response in the presence of a target response reduces the rate of target responding but increases its persistence, relative to training the target response on its own. Because of the parallels between these studies and differential‐reinforcement techniques to reduce problem behavior in clinical settings, alternative techniques to reduce problem behavior without enhancing its persistence are being explored. One potential solution is to train an alternative response in a separate stimulus context from problem behavior before combining the alternative stimulus with the target stimulus. The present study assessed how differences in reinforcement contingencies and rate for alternative responding influenced resistance to extinction of target responding when combining alternative and target stimuli in pigeons. Across three experiments, alternative stimuli signaling a response–reinforcer dependency and greater reinforcer rates more effectively decreased the persistence of target responding when combining alternative and target stimuli within the same extinction tests, but not when compared across separate extinction tests. Overall, these findings reveal that differences in competition between alternative and target responding produced by contingencies of alternative reinforcement could influence the effectiveness of treating problem behavior through combining stimulus contexts.     

Rural Young Adults’ Lay Theories of Intimate Partner Violence: A Qualitative Examination

This study qualitatively examined rural emerging adults’ ways of thinking (i.e., lay theories) about the causes of intimate partner violence (IPV) and ideas on how to prevent IPV most effectively. Participants were 74 individuals (majority Caucasian, heterosexual, low income) between the ages of 18 and 24 who resided in one of 16 rural communities. Participants’ perceptions of the causes of IPV included (a) individual‐level pathology, stress, and lack of education; (b) intergenerational transmission of violence and early‐life factors; (c) relationship stressors and challenges; and (d) community factors. Furthermore, participants felt that IPV could most effectively be prevented through (a) education and awareness; (b) victim‐focused efforts (e.g., teaching self‐esteem); and (c) job creation. Overall, participants identified a number of established risk factors for IPV perpetration across the social ecological model, although a number were never or rarely mentioned (e.g., peer group norms, positive bystander action, and collective efficacy). Future research should examine if and how perceptions of the causes of IPV impact IPV prevention engagement and impact. Further, prevention initiatives that take into account understandings of lay theories about IPV may be more impactful in reducing IPV than prevention initiatives that do not.     

Does Parental Relational Aggression Interact with Parental Psychological Control in the Prediction of Youth Relational Aggression?

In a sample of 117 youth and their parents, the associations between parental relational aggression, psychological control, youth gender, and youth relational aggression were examined. Boys with parents high on relational aggression and psychological control reported more relational aggression than boys with parents high on relational aggression and low on psychological control. Girls with parents low on relational aggression and high on psychological control reported more relational aggression than girls with parents low on relational aggression and psychological control. Results indicate youth may learn to use relational aggression from their parents, and have implications for intervention with relationally aggressive youth.     

Anger in response to challenge: children’s emotion socialization predicts approach versus avoidance

Negative emotion is typically associated with avoidance behavior; however, recent advances in the adult literature show that unlike some emotions (sadness, shame), anger predicts both approach and avoidance. Here we propose that socialization to suppress anger will play a role in whether children who express anger respond to a performance challenge with approach or avoidance. Children (N = 79; M _age  = 11.4 years) reported perceptions of parental use of positive conditional regard (PCR) to socialize anger suppression and worked on four unsolvable puzzles. We measured change in verbalized puzzle-solving strategies during failure, and coded emotion expression on the final puzzle. We examined whether negative emotion type (shame/sadness vs. anger) and PCR for anger predicted change in strategy use, and whether the association between level of PCR for anger and approach-avoidance (change in strategy use) depended on type of negative emotion expressed. Neither emotion expression nor level of PCR anger predicted strategy use; however, type of negative emotion moderated the association between PCR anger and change in strategy use, controlling for NCR anger. For children who displayed anger, low PCR was associated with increased strategy use, and high PCR was associated with decreased strategy use. We discuss the role of emotion socialization in shaping approach and avoidance motivation.     

Effect of failure/success feedback and the moderating influence of personality on reward motivation

While motivation to pursue goals is often assumed to be a trait-like characteristic, it is influenced by a variety of situational factors. In particular, recent experiences of success or failure, as well as cognitive responses to these outcomes, may shape subsequent willingness to expend effort for future rewards. To date, however, these effects have not been explicitly tested. In the present study, 131 healthy individuals received either failure or success feedback on a cognitive task. They were then instructed to either ruminate or distract themselves from their emotions. Finally, they completed the Effort Expenditure for Rewards Task, a laboratory measure of reward motivation. Results indicate that participants who received failure feedback relied more strongly on the reward magnitude when choosing whether to exert greater effort to obtain larger rewards, though this effect only held under conditions of significant uncertainty about whether the effort would be rewarded. Further, participants with high levels of trait inhibition were less responsive to reward value and probability when choosing whether to expend greater effort, results that echo past studies of effort-based decision-making in psychological disorders.