Discrimination between outcomes in instrumental learning: Effects of preexposure to the reinforcers

In two experiments rats received instrumental training with two response levers, one response being reinforced by sucrose solution and the other by sucrose pellets. Prior to a test session, on which both levers were made available in the absence of reinforcement, the rats were given free access to one of the reinforcers, a procedure known to reduce its value. It was found that the rats responded at a lower rate on the lever that had produced the now-devalued reinforcer, but that this effect was substantial only in rats that had received preexposure to the two reinforcers before instrumental training was begun (Experiment 1). Experiment 2 demonstrated that this effect was obtained only when presentations of the two reinforcers were presented according to an inter-mixed schedule during preexposure. It is suggested that this result constitutes an instance of the perceptual learning effect in which intermixed preexposure to similar events enhances their discriminability.     

Patient Suicide: A Survey of Therapists' Reactions

A substantial proportion of therapists will at some point in their professional life experience the loss of a patient to suicide. Our aims were to assess how therapists react to patient's suicide over time and which factors contribute to the reaction. One third of the therapists, mostly women, suffer from severe distress. The impact is not different for therapists in institutional settings and therapists in private practice. The item “overall distress” immediately after the suicide predicts emotional reactions and changes in behavior. Our data suggest that identifying the severely distressed subgroup could be done using a visual analogue scale for overall distress. As a consequence, more specific and intensified help could be provided to these individuals.     

SIMILARITIES AND DIFFERENCES IN WOMEN'S SEXUAL ASSAULT EXPERIENCES BASED ON TACTICS USED BY THE PERPETRATOR

Only a few studies have examined the characteristics of sexual assault based on the tactics used by the perpetrator. In this study we compared the experiences of women who were forced to engage in vaginal, anal, or oral intercourse due to verbal coercion, physical force, or intoxication. Random-digit dialing was used to obtain a sample of 272 single African American and Caucasian women between the ages of 18 and 49 from the Detroit metropolitan area. Participants completed a computer-assisted self-interview that asked detailed questions about a past sexual assault and their reactions to it. Among the 139 women who were forced to engage in vaginal, anal, or oral intercourse, sexual assaults that involved physical force produced the most severe negative outcomes. Situations that involved the woman being too intoxicated to resist differed from others primarily in terms of how much alcohol the man and woman consumed. Although all types of sexual assault were perceived as being at least moderately serious, verbally coerced assaults were on average perceived as being least serious. These findings suggest that the perpetrators' tactics affect women's responses to sexual assault.     

The Effects of Nations and Organisations on Work Value Importance: A Cross-Cultural Investigation

This research examined similarities and differences in the work values of employees of three German multinational organisations across nations and across organisations. Value importance was measured by the strength of the empirical relationship between satisfaction of a job facet or value and overall job satisfaction; satisfaction of more important values is more strongly related to overall satisfaction than is the satisfaction of less important values. Comparisons of value importance across nations and organisations indicated substantial similarity, in contrast to previous research that has measured value importance with direct ratings. Implications of the results for our understanding of work values and the meaning of work in multicultural contexts are discussed.
Cette recherche étudie les points communs et les différences dans les valeurs professionnelles des salariés de trois multinationales allemandes, cela sur plusieurs pays et organisations. L'importance d'une valeur a étéévaluée à partir de la force de la relation empirique entre la satisfaction procurée par un aspect du travail ou l'une de ses valeurs et la satisfaction professionnelle globale; la satisfaction due aux plus importantes des valeurs est davantage corrélée à la satisfaction générale que ne l'est la satisfaction apportée par les valeurs périphériques. La comparaison de l'importance des valeurs dans les divers pays et organisations a mis en évidence une grande proximité en contradiction avec les recherches antérieures qui avaient mesuré l'importance des valeurs avec des évaluations directes. On expose les retombées de ces résultats pour l'étude des valeurs professionnelles et de la signification du travail dans des contextes multiculturels.