Caffeine,impulsivity, and memory scanning: A comparison of two explanations for the Yerkes-Dodson Effect

Two explanations for the Yerkes-Dodson Effect (1908) were tested. Easterbrook (1959) proposed that arousal reduces the range of cue utilization. Thus, arousal should interfere with the capacity for simultaneous (dual) memory scans. In contrast, Humphreys and Revelle (1984) proposed that arousal facilitates sustained information transfer but interferes with short-term memory. Arousal should thus reduce the time needed to prepare to respond but increase the time needed to scan memory. Either caffeine or placebo was given to 78 subjects who differed in impulsivity. They completed three versions of a memory-scanning task: two single-task versions (physical and category matches) and one dual-task version (either type of match). As predicted by Humphreys and Revelle, relative to placebo, caffeine lowered the intercept (p<.01), suggesting facilitation of sustained information transfer, but increased the slope (p<.05), suggesting impairment of access to short-term memory, of the regression of reaction time on log-transformed memory-set size. That caffeine had a main effect on slopes and on intercepts but did not interact with type of task suggests that arousal does not necessarily disrupt dual-task performance.     

Incidence of having dreamed and conservative political attitudes

The association of political attitudes of conservatives and reports of their having had a dream was investigated. 48 female graduate students in counseling psychology were given the KJP Dream Inventory and the Kerlinger Social Attitude Scale II. Scores on conservative political attitudes were positively correlated with having had Dreams of Falling (.40), Dream Discontentedness (.31), Dreams of Being Chased (.40), and Dreams of Being Famous (.30). Negative correlations were observed between scores showing a conservative political tendency and scores on Openness (-.35), and Uninhibitedness (-.50), as well as incidence of Dreams of Sex (-.29). The character of conservative dreaming is discussed along with the study's relevance to past and subsequent issues in research.     

The role of free choice in memory for past decisions

After choosing between different options, people tend to remember the features of the options in ways that favour the chosen alternative. The present experiment examined how limitations on freedom to choose between options affected this memory bias. Participants were given a series of two-option choices and were either allowed free choice between options or were assigned to an option. Participants assigned to an option were led to believe that either the selection was random or was made in their best interest based on their personality profile. Results indicated that the choice and best interest conditions demonstrated memory attributions that favoured their received options, whereas the assignment condition did not. These findings support the view that memory biases towards received options are not unique to free choice situations, but may stem from expectations and implicit theories about how and why the choice was made.     

Use of a token economy to eliminate excessive inappropriate social behavior in an adult with developmental disabilities

Adults with developmental disabilities frequently have both deficits in appropriate social skills and excesses in inappropriate social behavior (Matson, LeBlanc, & Weinheimer, 1999). Typically, published treatment studies have focused on social skills training procedures that teach and promote the use of new social behaviors. However, only a few studies have focused on management of existing social behaviors that are problematic because they occur excessively or in an inappropriate context (Wright, Herzog, & Seymour, 1992). The current study focuses on management of three types of inappropriate social behavior in a 26‐year‐old male with moderate mental retardation: inappropriate social interactions, inappropriate sexual behavior, and verbal aggression. A token economy with response cost procedure was implemented using a DRO interval as the basis for earning tokens. Using a multiple‐baseline design across behaviors, each of the three types of inappropriate social behavior was successfully treated. After demonstrating the success of the procedure, the DRO interval was increased while maintaining the reductions in inappropriate social behaviors. Appropriate behaviors such as initiating conversation, shaking hands, etc maintained throughout the intervention. Copyright © 2000 John Wiley & Sons, Ltd.     

Developmental considerations for assessment of trauma symptoms in preschoolers: a review of measures and diagnoses

Child maltreatment can lead to a unique set of trauma stress among young children that can be challenging to measure. The purpose of this review was to review measures of maltreatment-related trauma outcomes (trauma-related symptoms and post-traumatic stress disorders) in very young children (ages 0–6) and to examine research trends in how and if child development is accounted for in this area of measurement. A systematic search strategy was used to identify articles in two databases, CINAHL and PsychInfo. Articles were eligible for inclusion in the review if they measured trauma symptoms in children ages 0–6, were quantitative research reports of studies conducted in North America, and were published in English. The search resulted in 74 articles meeting prespecified inclusion criteria. Results suggested that recognition of the ways maltreatment trauma affects child development and the importance of developmental sensitivity in assessing trauma symptoms has grown in recent years. However, many research studies did not use developmental frameworks and applied adult-oriented trauma symptom frameworks in measurement and treatment. Behavioral symptoms were the primary outcome of interest for this age group. There was also incongruity and lack of consensus about diagnostic tools for post-traumatic stress disorders in young children. Further research is needed to resolve theoretical and empirical controversies related to measurement and diagnosis of trauma symptomatology in young children.     

The Sociocultural Context of Sexually Diverse Women’s Sexual Desire

Women’s sexual desire is a complex, multifaceted phenomenon. According to the biopsychosocial model of female sexual function, a comprehensive understanding of women’s sexuality requires awareness of the presence of and interaction between biological, psychological, interpersonal, and sociocultural factors. Other sexuality scholars in the field have similarly stressed this perspective, emphasizing that sexual desire in particular is impacted by medical, relational, psychological, and sociocultural influences. Given the influence of sociocultural variables like sexism and heterosexism on women’s lives, we sought to understand the impact of the sociocultural context on sexual desire in 31 bisexual, lesbian, and heterosexual women. Women ranged in age from 20 to 69 and answered a number of questions related to their experience of sexual desire and the ways in which desire related to their sexual identity. The semi-structured interviews focused on women’s retrospective, subjective accounts of their experiences. Using a consensual qualitative research approach and thematic analysis, the interviews revealed four themes and seven subthemes: (1) minority stress (heterosexist discrimination, stigmatized identities, coming out, impact of visible/safe spaces); (2) gender expectations (gendered relationship expectations, gender binary impacts, body image); (3) religion; and (4) taboo and changing cultural times. Participant responses suggest that the sociocultural context can influence the sexual desire of diverse women, supporting both sexual desire exploration and suppression of desire expression by context. Practice and advocacy considerations include understanding of the impact of systems of privilege and oppression (e.g., sexism, heterosexism, racism) on women’s sexual desire experiences and opportunities for supporting diverse women’s sexual empowerment.     

Optimism,well-being,depressive symptoms,and perceived physical health: a study among Stroke survivors

The investigation of the relation of positive personality characteristics to mental and physical health among Stroke survivors has been a neglected area of research. The purpose of this study was to examine the relationship between optimism, well-being, depressive symptoms, and perceived physical health among Stroke survivors. It was hypothesized that Stroke survivors’ optimism would explain variance in their physical health above and beyond the variance explained by demographic variables, diagnostic variables, and mental health. One hundred seventy-six Stroke survivors (97 females, 79 males) completed the Revised Life Orientation Test, the Center for Epidemiological Studies Depression Scale, two items on perceived physical health from the 36-item Short Form of the Medical Outcomes study, and the Identity scale of the Illness Perception Questionnaire. Pearson correlations, hierarchical regression analyses, and the PROCESS approach to determining mediators were used to assess hypothesized relations between variables. Stroke survivors’ level of optimism explained additional variance in overall health in regression models controlling for demographic and diagnostic variables, and mental health. Analyses revealed that optimism played a partial mediator role between mental health (well-being, depressive symptoms and total score on CES-D) variables and overall health.     

How honest are the signals? A protocol for validating wearable sensors

There is growing interest among organizational researchers in tapping into alternative sources of data beyond self-reports to provide a new avenue for measuring behavioral constructs. Use of alternative data sources such as wearable sensors is necessary for developing theory and enhancing organizational practice. Although wearable sensors are now commercially available, the veracity of the data they capture is largely unknown and mostly based on manufacturers’ claims. The goal of this research is to test the validity and reliability of data captured by one such wearable badge (by Humanyze) in the context of structured meetings where all individuals wear a badge for the duration of the encounter. We developed a series of studies, each targeting a specific sensor of this badge that is relevant for structured meetings, and we make specific recommendations for badge data usage based on our validation results. We have incorporated the insights from our studies on a website that researchers can use to conduct validation tests for their badges, upload their data, and assess the validity of the data. We discuss this website in the corresponding studies.     

Callous-Unemotional Traits,Relational and Social Aggression,and Interpersonal Maturity in a Sample of Behaviorally Disordered Adolescents

The authors examined the degree to which callous-unemotional traits and narcissism predict relational aggression, social aggression, and prosocial skills in a sample of 79 adolescent offenders (13–18 years old; 26% girls; 74% boys) attending a school for youth with behavior disorders in the Mid-Atlantic United States. Narcissism made a significant contribution to the prediction of both relational aggression and social aggression, accounting for most of the unique variance in the prediction of these indirect forms of aggression. Conversely, callous-unemotional traits—but not narcissism—made a significant contribution to the prediction of lower prosocial skills. Furthermore, in contrast to the large number of studies indicating gender differences in the expression of aggression, no significant gender differences in the present study were found.