Mood and alcohol consumption: an experience sampling test of the self-medication hypothesis

In this investigation the authors applied the experience sampling method to prospectively test the self-medication hypothesis. In vivo reports gathered in the context of daily life demonstrated that nervousness was the only negative mood state to predict increases in alcohol consumption later in the course of the day. Further examination of this within-person relationship demonstrated that men were more likely to consume alcohol when nervous than were women, but this association was unrelated to family history of alcoholism, problem drinking patterns, or trait anxiety and depression. Consistent with the self-medication hypothesis, cross-sectional analyses also confirmed that alcohol consumption was generally associated with lower levels of nervousness; this effect varied by several demographic and clinical variables. These findings are discussed in terms of the diversity of reasons for alcohol consumption and their potential for explaining problem drinking.     

Directing wayfinders with maps: the effects of gender, age, route complexity, and familiarity with the environment

The participants were 360 Canadian undergraduates. After receiving written scenarios involving a campus visitor seeking direction to a nearby destination (simple route) or a distant destination (complex route), they drew maps to that destination. The authors varied the visitor's gender, age, and familiarity with campus. They analyzed the content of the students' maps in terms of cardial indicators (compass grid, correct north-south orientation), landmarks, labeled buildings, directional arrows, and supplemental written directions. The men tended to provide more cartographically complete maps than the women, though there were no gender differences in use of landmarks or labeled buildings. The men were significantly more inclined than the women to take visitor characteristics into account, providing more complete maps to visitors navigating complex routes, to newcomers, and to older visitors who were unfamiliar with the campus. The men had more confidence that their maps would successfully lead visitors to their destinations. Route complexity led to greater use of landmarks, labeled buildings, and cardinal indicators. The participants' self-reported familiarity with campus had little effect on their direction giving, except for a greater use of labeled buildings in maps.     

Peer Interaction: What Causes What?

Peer interaction is examined as a source of behavior change in children and adolescents. The dynamics of peer influence are discussed in terms of six issues: characteristics of the influence source; characteristics of the child or adolescent being influenced; the relationship existing between influence source and the individual being influenced; developmental change; processes underlying peer influence; and constraints deriving from the behavior domain being examined. Research shows that contact with peers has complex effects on individual behavior, and numerous moderators and mediators must be considered in order to account for them. The discussion is linked to the papers included in this special issue.     

Self-fulfilling prophecies: the synergistic accumulative effect of parents' beliefs on children's drinking behavior

This research examined whether mothers' and fathers' beliefs about their children's alcohol use had cumulative self-fulfilling effects on their children's future drinking behavior. Analyses of longitudinal data acquired from 115 seventh-grade children and their mothers and fathers were consistent with synergistic accumulation effects for negative beliefs: Parents' beliefs predicted the greatest degree of confirmatory behavior from children when both mothers and fathers overestimated their children's alcohol use. Results did not support synergistic accumulation effects for positive beliefs: Children's predicted future alcohol use was similar regardless of whether one parent or both underestimated their child's alcohol use. These findings suggest that the generally small self-fulfilling effects reported in the literature may underestimate the power of negative self-fulfilling prophecies to harm targets because studies have not taken into consideration the possibility that negative self-fulfilling prophecies may be more likely than positive ones to accumulate across multiple perceivers.     

Improvements in hippocampal-dependent learning and decremental attention in 5-HT(3) receptor overexpressing mice

The 5-HT3 receptor for serotonin is expressed within limbic structures and is known to modulate neurotransmitter release, suggesting that this receptor may influence learning and memory. Perturbations in serotonergic neurotransmission lead to changes in the ability to attend, learn, and remember. To examine the role of 5-HT3 receptors in learning, memory, and attention, 5-HT3 receptor overexpressing (5-HT3-OE) transgenic mice and their wild-type littermates (WT) were tested in Pavlovian contextual and cued fear conditioning, fear extinction, and latent inhibition (LI) paradigms. Prepulse inhibition (PPI) was assessed to reveal changes in sensorimotor gating. Additionally, anxious behaviors, shock sensitivity, and reactions to novel stimuli were evaluated. 5-HT3-OE mice displayed enhanced contextual conditioning, whereas cued conditioning remained the same as that of WT mice. 5-HT3-OE mice did not differ from WT in extinction rates to either the context or cue. LI was enhanced for 5-HT3-OE mice compared to WT. PPI remained unchanged. No differences in sensitivity to footshock or startle were found. However, 5-HT3-OE mice demonstrated heightened exploratory behavior in response to novel environmental stimuli and decreased anxiety as measured in the elevated plus-maze. Results indicate that overexpression of the 5-HT3 receptor in mouse forebrain results in enhanced hippocampal-dependent learning and attention. Enhanced inspective behavior in response to novelty may contribute to the observed improvements in learning, memory, and attention due to 5-HT3 receptor overexpression.     

Perceived risk of work-related injury and intentions to change employment

A survey of 263 employed men and women examined the effect of length of employment, perceived ability to find a better job, positive job features (pay, job security, and intrinsic interest), and perceived risk of occupational injury on intentions to stay with or leave one's current employer. Perceived risk of occupational injury significantly predicted one's belief that the person would not stay with the current employer. Perceived inability to find alternative employment lessened the desirability of leaving the current employer. Desire to leave was lower when a job was rated highly for pay, security, and intrinsic interest. Length of employment, as a measure of job commitment, was not a factor.