Win-shift and win-stay learning in the short-beaked echidna (<Emphasis Type="Italic">Tachyglossus aculeatus</Emphasis>)

Numerous previous investigators have explained species differences in spatial memory performance in terms of differences in foraging ecology. In three experiments we attempted to extend these findings by examining the extent to which the spatial memory performance of echidnas (or "spiny anteaters") can be understood in terms of the spatio-temporal distribution of their prey (ants and termites). This is a species and a foraging situation that have not been examined in this way before. Echidnas were better able to learn to avoid a previously rewarding location (to "win-shift") than to learn to return to a previously rewarding location (to "win-stay"), at short retention intervals, but were unable to learn either of these strategies at retention intervals of 90 min. The short retention interval results support the ecological hypothesis, but the long retention interval results do not. Electronic Publication     

The Role of Referent and Expert Power in Mutual Help

This study explored the roles of referent power (i.e., influence based on sense of identification) and expert power (i.e., influence based on knowledge and expertise) in Schizophrenics Anonymous (SA), a mutual-help group for persons experiencing a schizophrenia-related illness. The study describes SA participants' experience of referent and expert power with SA members, SA leaders, and with mental health professionals. It also examines whether or not referent and expert power ascribed to fellow SA participants predicts the perceived helpfulness of the group. One hundred fifty-six SA participants were surveyed. Participants reported experiencing higher levels of referent power with fellow SA members and leaders than with mental health professionals. They reported higher levels of expert power for mental health professionals and SA leaders than for SA members. The respondents' ratings of their SA group's helpfulness was significantly correlated with ratings of referent and expert power. Although expert power was the best independent predictor of helpfulness, a significant interaction between referent and expert power indicated that when members reported high referent power, expert power was not related to helpfulness. These results are interpreted to suggest that there are multiple forms of social influence at work in mutual help.     

Families created through surrogacy arrangements: parent-child relationships in the 1st year of life

Findings are presented of a study of families created through surrogacy arrangements. Forty-two surrogacy families were compared with 51 egg-donation families and 80 natural-conception families on standardized interview and questionnaire measures of the psychological well-being of the parents, the quality of parent-child relationships, and infant temperament. The differences that were identified between the surrogacy families and the other family types indicated greater psychological well-being and adaptation to parenthood by mothers and fathers of children born through surrogacy arrangements than by the natural-conception parents.     

Measuring Behavior 2002 4th International Conference on Methods and Techniques in Behavioral Research Amsterdam, The Netherlands 27–30 August 2000

Notices and Announcements

Measuring Behavior 2002 4th International Conference on Methods and Techniques in Behavioral Research Amsterdam, The Netherlands 27–30 August 2000     

Who's Being Served? "Self-Serving" Attributions in Social Hierarchies

Making external attributions for negative events, though often considered “self-serving,” also implies that the attributor is not in control of critical resources. We hypothesized that making external attributions for negative events will lead to impressions of powerlessness. Because individuals in high-status roles are expected to have power and control, external attributions may violate these role expectations; thus, we further hypothesized that status would moderate the relationship between attributions and interpersonal outcomes. Specifically, more negative impressions and affect will be directed toward high-status individuals who make external attributions than toward their lower status counterparts. Three studies were conducted, one using a role-play methodology, one using an experimentally created hierarchy, and one using vignettes. The results supported our hypotheses: external attributions can be highly disserving for people in high-status positions.     

From Detachment to Immersion: Wittgenstein and 'The Problem of Life'

Wittgenstein is widely recognised as a philosopher with a markedly ethical character to his thought. This paper seeks to highlight the dimension of selflessness and renunciation in this ethical character. It also seeks to show that there are distinct differences in Wittgenstein's implicit conception of what an ethical selflessness amounts to in the early and the later periods. The concept of absolute safety enables us to appreciate the connections between the early Wittgenstein and a particular type of nineteenth-century obsession with a selflessness that combines with a self-sufficient capacity to stand aloof from anxiety in the face of the human condition involving meaninglessness and death. In the early Wittgenstein that aloofness came close to a solipsistic and, in some ways, self-affirming apartness from everything other than the self. In contrast, the ethical spirit that permeates Wittgenstein's later thought is imbued with a sense of the immersion of the self ultimately and absolutely 'in the world'. The sense in which this latter phrase is used is defined further in the paper.     

Verbal Strategies for Seeking Help in Organizations1

The verbal strategies used to frame requests for help are integral to the help-seeking process. Drawing on politeness theory, it was predicted that gender, power, and norms affect usage of verbal strategies in seeking help, and verbal strategies predict interpersonal outcomes. Two studies showed that: (a) individuals used more strategies under collectivistic than individualistic norms; (b) under individualistic norms, men used more strategies when seeking help upward, and women used more strategies when seeking help laterally; and (c) those who used more strategies provided higher quality information, and were perceived more favorably by others. These results suggest that verbal strategies not only reflect important relational and contextual factors, but also serve multiple social functions.     

Witnesses in action: the effect of physical exertion on recall and recognition

Understanding memory performance under different operational conditions is critical in many occupational settings. To examine the effect of physical exertion on memory for a witnessed event, we placed two groups of law-enforcement officers in a live, occupationally relevant scenario. One group had previously completed a high-intensity physical-assault exercise, and the other had not. Participants who completed the assault exercise showed impaired recall and recognition performance compared with the control group. Specifically, they provided significantly less accurate information concerning critical and incidental target individuals encountered during the scenario, recalled less briefing information, and provided fewer briefing updates than control participants did. Exertion was also associated with reduced accuracy in identifying the critical target from a lineup. These results support arousal-based competition accounts proposing differential allocation of resources under physiological arousal. These novel findings relating to eyewitness memory performance have important implications for victims, ordinary citizens who become witnesses, and witnesses in policing, military, and related operational contexts.