Role of the area postrema in three putative measures of motion sickness in the rat

After thermal cauterization of the area postrema in rats the absence of conditioned taste aversion to sucrose paired with lithium chloride (0.15 M, 3.3 ml/kg) was used as a pharmacologic/behavioral index of area postrema damage. In a subsequent experiment the effects of area postrema lesions on three measures proposed as species-relevant measures of motion sickness were studied, using off-vertical rotation at 150 degrees/s for either 30 or 90 min. Lesions of area postrema did not alter postrotational suppression of drinking or amount of defecation during motion. The initial acquisition of conditioned taste aversion to a novel cider vinegar solution paired with motion was not affected by lesioning of the area postrema, but these taste aversions extinguished more slowly in lesioned rats than in sham-operates or intact controls. Results are discussed in terms of proposed humoral factors which may induce motion sickness and in light of recent data on the role of the area postrema in similar measures in species possessing the complete emetic reflex.     

Understanding Seat-Belt Intentions and Behavior: A Decision-Making Approach1

In an experimental study designed to investigate a decision-making model of seat-belt use, 227 employees of an agrochemical company participated in a health information program in which they watched either a videotape on seat belts or a control videotape and completed questionnaires immediately afterward and at 3 months and 1 year after exposure. In terms of total effects, the seat-belt videotape influenced beliefs, fear, and intentions assessed immediately after exposure, but had no effect on self-reported frequency of belt use at 3 months or 1 year. A full path analysis indicated some support for the decision-making model. In particular, probability difference (the perceived reduction in risk of death or serious injury due to wearing a belt) had a large influence on intentions to wear a belt and partly mediated the effect of the videotape on intentions. Reported frequency of belt use at 3 months was influenced both by post-test intentions and by initial frequency of belt use. Similarly, belt use at 1 year was affected by belt use at 3 months and by initial belt use. The findings are discussed in terms of the role of subjective probabilities and habitual factors in seat-belt use.     

The reliability and concurrent validity of alternative methods for assessing ego development

This study demonstrates that an unstructured interview (INT) and the Thematic Apperception Test (TAT) are suitable alternatives to Loevinger's Sentence Completion Test of Ego Development. Seventy subjects were solicited from six groups varying widely with respect to age and education level. Each subject was asked to complete the SCI, an INT and the TAT. Two raters using Loevinger and Wessler's self-training exercises and Loevinger, Wessler, and Redmore's scoring manual rated subjects' responses to each instrument. Reliability was found between raters and concurrent validity between instruments. Subjects scoring high on the SCT were found to score higher on the INT and TAT.     

Schizophrenia and deliberate self-harm: a systematic review of risk factors

Deliberate self-harm (DSH) is a strong predictor of suicide in schizophrenia. The aim of this review was to identify risk factors for DSH in schizophrenia. This systematic review of the international literature examined cohort and case-control studies of patients with schizophrenia or related diagnoses that reported DSH as an outcome. Studies were identified by searching electronic databases and reference lists, and by consulting international experts. Fourteen studies met the eligibility criteria. Of the 29 variables examined by two or more studies, five (past or recent suicidal ideation, previous DSH, past depressive episode, drug abuse or dependence, and higher mean number of psychiatric admissions) were associated with an increased risk of DSH, and one (unemployment) was associated with a reduced risk. Schizophrenic patients with these risk factors need careful follow-up and monitoring, with treatment of any associated comorbid depression or drug abuse. Large, prospective studies of DSH in schizophrenia are needed to further define risk factors and to build on the findings of this review.     

Covariational influences on goal-based explanation: an integrative model

Covariational and goal-based approaches to social attribution have been treated as competitive or incommensurable. This article integrates key aspects of each approach. Four studies examined preferences for motivating factors (or goals) and enabling factors (or preconditions) as explanations of intentional actions. The studies manipulated (Studies 1-3) and measured (Study 4) the perceived covariation of these goal-based causes with target actions. Causes that covaried with actions were preferred explanations, in contrast with the goal-based view that motivating factors are generally preferred to enabling factors. Combining goal-based beliefs and covariational reasoning resolves problems faced by each individual approach and generates a novel explanatory typology that combines strengths of goal-based and covariational typologies.     

When just-world beliefs promote and when they inhibit forgiveness

The present study provides further evidence that justice and forgiveness are not necessarily competitive responses. Among 157 undergraduates instructed to recall either serious or benign transgressions, just-world beliefs for the self (BJW-self) was associated with forgiveness as inhibition of negative responding but not forgiveness as positive responding. Each of these relations was significantly moderated by transgression severity: the more benign the transgression, the stronger the relationship. Just-world beliefs for others (BJW-others) was negatively associated with inhibition of negative responding and unrelated to positive responding. These relations held over and above well-established predictors of transgression-specific forgiveness (relationship closeness and post-transgression offender effort), and an individual difference variable, justice sensitivity. In practical terms, BJW-self may enable people to better deal with minor stressors. An important theoretical implication is that modelling the relationship between just-world beliefs and forgiveness requires a bidimensional conception of both constructs.     

Spatiotemporal competition and task-relevance shape the spatial distribution of emotional interference during rapid visual processing: Evidence from gaze-contingent eye-tracking

People’s ability to perceive rapidly presented targets can be disrupted both by voluntary encoding of a preceding target and by spontaneous attention to salient distractors. Distinctions between these sources of interference can be found when people search for a target in multiple rapid streams instead of a single stream: voluntary encoding of a preceding target often elicits subsequent perceptual lapses across the visual field, whereas spontaneous attention to emotionally salient distractors appears to elicit a spatially localized lapse, giving rise to a theoretical account suggesting that emotional distractors and subsequent targets compete spatiotemporally during rapid serial visual processing. We used gaze-contingent eye-tracking to probe the roles of spatiotemporal competition and memory encoding on the spatial distribution of interference caused by emotional distractors, while also ruling out the role of eye-gaze in driving differences in spatial distribution. Spontaneous target perception impairments caused by emotional distractors were localized to the distractor location regardless of where participants fixated. But when emotional distractors were task-relevant, perceptual lapses occurred across both streams while remaining strongest at the distractor location. These results suggest that spatiotemporal competition and memory encoding reflect a dual-route impact of emotional stimuli on target perception during rapid visual processing.     

Specific Onboarding Practices for the Socialization of New Employees

Onboarding is frequently used by organizations to help socialize newcomers, but little research has focused on the specific onboarding practices organizations use or the effectiveness of those practices in facilitating newcomer adjustment. To begin addressing this gap, this study explores specific onboarding practices and evaluates the Inform‐Welcome‐Guide framework of onboarding practices. Data are presented from representatives of 10 organizations regarding what onboarding practices they offer and how those practices are offered. Three hundred seventy‐three new employees from those same 10 organizations also shared their perceptions of the practices they experienced, when those practices were experienced, and the perceived helpfulness of those practices. Lastly, the extent to which new employees were socialization was assessed. Several research questions and hypotheses among these variables were examined, and most of the hypotheses supported. Implications of these findings for future research and practice are discussed.