Adaptable Robots

In this essay we consider some of the characteristics of adaptive biological systems and how these might work as models in designing a robot intended for the exploration of complex environments. Trying to design a robot that has such properties forces one to think hard about the nature of those properties. Here we have one intersection between philosophy and computing. We consider the nature of adaptability and some properties of complex biological systems that are relevant to designing adaptive robots, including direct perception, animacy, affordances, redundant degress of freedom, collective decisions, and emergent properties. We explain how these concepts were used in the development of a robotic arm.     

The book of Job as a resource for counseling

The book of Job is commonly considered an exemplary study in the dynamics of suffering and the problem of theodicy. This article considers the book of Job for its insights into the challenge of providing pastoral care to persons in spiritual pain. The dialog between Job and his friends illustrates how spiritual distress challenges the theological assumptions of both sufferer and caregiver. In an effort to maintain one's own spiritual equilibrium, and no doubt out of good faith efforts to comfort the afflicted, the pastoral caregiver may be tempted to cling to theological formulas and religious perspectives which disallow the sufferer's experience of anger and despair. The story of Job affirms the value of authenticity over piety, speaks of the transformative power of suffering, and provides the counselor/pastoral caregiver insights into the pitfalls and promise of caring for persons in spiritual pain.     

Change in caregiver depression as a function of the Strong African American Families Program.

A randomized prevention trial contrasted families who participated in the Strong African American Families Program (SAAF), a preventive intervention for rural African American parents and their 11-year-olds, with control families. This article focuses on the program's effect on primary caregivers' depressive symptoms. Among the 167 caregivers with elevated scores on the Center for Epidemiologic Studies-Depression Scale, SAAF participation was associated with reduced depressive symptoms, enhanced parenting, and perceived improvements in youth behavior. Change in parenting (consistent discipline, youth monitoring, and open communication) but not change in youth intrapersonal competencies significantly mediated intervention effects on caregivers' depression. Results support the link between reduced depressive symptoms and stronger family relationships, particularly the importance of enhanced parenting efficacy in alleviating depressive symptoms.     

Placement shift, sibling relationship quality, and child outcomes in foster care: a controlled study.

Sibling unity during family transitions is considered a protective factor for child behavior problems, but there is little empirical support for the widespread child protection policy of placing siblings together in foster care. In a prospective study of 156 maltreated children, siblings were classified in 1 of 3 placement groups: continuously together (n = 110), continuously apart (n = 22), and disrupted placement (siblings placed together were separated; n = 24). Changes in child adjustment as a function of sibling relationship and placement group were examined. Sibling positivity predicted lower child problems at follow-up (about 14 months later), while sibling negativity predicted higher child problems. Placement group did not affect child behavior problems at follow-up; however, compared to siblings in continuous placement (either together or apart), siblings in disrupted placement with high initial behavior problems were rated as having fewer problems at follow-up, while siblings in disrupted placement with low initial behavior problems were rated as having more problems at follow-up. These findings highlight the importance of considering relationships between siblings and the risk that one poses to another before early placement decisions are made.     

Increased sensitivity to the disinhibiting effects of alcohol in binge drinkers.

Heavy episodic alcohol use, or binge drinking, is a serious public health problem. Binge drinking is endemic in college students and has resulted in numerous alcohol-related tragedies, including acute alcohol poisonings, falls, and automobile collisions. Such negative outcomes might occur because binge drinkers are generally more impulsive, and this impulsivity might be exacerbated under alcohol. The purpose of this study was to examine this hypothesis by comparing the acute effects of alcohol on a cognitive measure of behavioral control in binge and nonbinge drinkers. The results indicated that binge drinkers act more impulsively and report feeling more stimulated under an acute 0.65 g/kg dose of alcohol compared to nonbinge drinkers. The present finding of a heightened disinhibitory reaction to alcohol in binge drinkers may help explain the link between impulsivity and problem drinking at a more fundamental level of behavioral control.     

Context and cognitions: environmental risk, social influence, and adolescent substance use

This study examined the cognitions thought to mediate the impact of context on adolescent substance use and also the extent to which context moderates the relations between these cognitions and use. Risk cognitions and behaviors were assessed in a panel of 746 African American adolescents (M age 10.5 at Wave 1, 12.2 at Wave 2). Results indicated that adolescents living in high-risk neighborhoods were more inclined toward substance use and more likely to be using at Wave 2. These context effects were mediated by the adolescents' risk cognitions: their risk images, willingness to use, and intentions to use. Also, context moderated the relation between willingness and use (the relation was stronger in high-risk neighborhoods) but it did not moderate the intentions to use relation.     

Working memory capacity and retrieval from long-term memory: the role of controlled search

In two experiments, the role of working memory capacity (WMC) in the controlled search of long-term memory was examined. Participants performed a prolonged category fluency task that required them to retrieve as many animals as possible in 5 min. The results suggested that WMC differences arose in the numbers of animals retrieved, the numbers of clusters retrieved, and the rates of the retrieval (Exp. 1). However, no differences were found in terms of how participants initiated retrieval or in the nature of the clusters generated. Furthermore, an examination of differences in retrieval strategies suggested that high-WMC individuals were more strategic than low-WMC individuals and that these differences in retrieval strategies accounted for the overall differences in the numbers of animals retrieved. Additionally, presenting participants with retrieval cues eliminated WMC differences in the numbers of animals retrieved (Exp. 2). These results suggest that low-WMC individuals are less able than high-WMC individuals to select and utilize appropriate retrieval strategies to self-generate cues to access information in long-term memory. Collectively, the results are consistent with research suggesting that WMC is important for controlled search from long-term memory.     

Politicians and Trustworthiness: Acting Contrary to Self-Interest Enhances Trustworthiness

Trustworthiness is an important characteristic for politicians to possess. However, politicians are perceived as manifestly untrustworthy. One way politicians might build trustworthiness is to behave in a manner that seems contrary to self-interest. Three studies examined whether acting contrary to self-interest can help build trustworthiness. In each study, participants reacted to political content in which a politician acted contrary to self-interest (praised an opponent) or acted in a more common and self-serving manner (e.g., attacked opponent or praised the self). Participants perceived the candidate who acted contrary to self-interest as more trustworthy than candidates who acted in a more self-serving manner. Participants were also more willing to consider voting for such a candidate. These results were not constrained by party affiliation.     

Treatment of a four-year-old victim of incest

Abstract

A case study describing the use of behavior techniques in the treatment of a four—year—old sexual assault victim is presented. The target behaviors included eating, phobic behaviors, self—injurious behaviors, and comments made about the father (the perpetrator) and the paternal grandmother. The child's mother served as both data collector and therapist. The study demonstrates that child victims can experience a sexual assault trauma syndrome similar to that manifested by adult victims. Additionally, the findings illustrate that a simple behavioral intervention implemented by a parent can be effective in treating young sexual assault victims.