Man as a Stabiliser of Systems: From Static Snapshots of Judgement Processes to Dynamic Decision Making

The feedback arrow extending from the response to the distal state in the lens model, together with Brunswik's dictum that the organism is a stabiliser of systems, implies a dynamic view of behaviour. This paper describes the main problems in the study of dynamic decision making: feedback delays and the feedback structure of the tasks. It also describes microworlds, a methodology for studying dynamic decision making in the laboratory. The results from experiments with microworlds show that subjects have problems compensating for feedback delays and side effects. These results are discussed in terms of Brunswik's distinction between perception and thinking.     

POLICY CONFLICT AS A FUNCTION OF POLICY SIMILARITY AND POLICY COMPLEXITY

B rehmer B. Policy conflict as a function of policy similarity and policy complexity. Scand. J. Psychol ., 1972, 13 , 208–221.—The experiment tests the hypotheses, derived from the results of earlier studies on policy conflict, that subjects with similar policies will decrease their agreement in a policy conflict situation, and that subjects with cognitively complex policies will decrease their agreement more than subjects with cognitively simple policies. The results support the hypotheses, and show that the decrease in agreement is due to the decrease in policy consistency which, in turn, is due to the manner in which the subjects change their policies in the conflict situation.     

COMMUNICATION AND CONFLICT REDUCTION A CROSS-CULTURAL STUDY1

Deux expériences distinctes, L'une aux Etats-Unis, L'autre en Suède, ont été consacrées aux effets de trois niveaux de communication (Communication Nulle — Communication Factuelle — Communication Totale) sur la réduction des conflits inter-personnels. Deux sujets, amenés, par entraînement préalable, à un système de croyance différent, doivent parvenir à une décision commune dans une tâche nouvelle, mais semblable à la première. La réduction du conflit est faible dans toutes les conditions. Cependant les sujets avec communication totale montrent moins de conflit que les sujets sans communication (p < .01), les sujets avec communication factuelle se situant entre les deux. On n'observe aucune différence, entre les deux pays, dans L'effet du niveau de communication sur la réduction du conflit. Enfin, la connaissance par feedback des conséquences de la tâche n'a pas d'effet sur la réduction du conflit cognitif, ce qui suggèrerait que L'on doive utiliser d'autres types de feedback pour réduire de tels conflits.     

Cortisol and stimulus-induced arousal level differentially impact memory for items and backgrounds

Most studies examine the effects of stress on memory for visual information test memory for entire scenes. However, arousal levels may differentially influence memory for backgrounds as opposed to items. Participants encoded scenes that included a negative-high-arousal, negative-moderate-arousal, or neutral item on a neutral background. After a 30-minute (Experiment 1) or 48-hour delay (Experiment 2), participants underwent a stressor or control task while heart rate was recorded. A recognition memory task was then given with items and backgrounds presented separately. High-arousal images had a greater detriment in background memory than moderate-arousal images. Further, though there was evidence that change in cortisol level at retrieval was associated with impaired memory for items, it was not associated with detriments in background memory. Increased heart rate was associated with impaired memory for both items and backgrounds. This suggests that the level of sympathetic and cortisol reactivity differentially affects memory for items and backgrounds.     

Prospective memory across the lifespan: Investigating the contribution of retrospective and prospective processes

Prospective memory performance follows an inverted U-shaped function across the lifespan. Findings on the relative contribution of purely prospective memory and retrospective memory processes within prospective memory to this trajectory are scarce and inconclusive. We analyzed age-related differences in prospective memory performance across the lifespan in a cross-sectional design including six age groups (N = 99, 7–83 years) and investigated possible mechanisms by experimentally disentangling the relative contributions of retrospective memory and purely prospective memory processes. Results confirmed the inverted U-shaped function of prospective memory performance across the lifespan. A significant interaction between process type and age group was observed indicating differential relative contributions of retrospective memory and purely prospective memory processes on the development of prospective memory performance. Our results showed that mainly the pure prospective memory processes within prospective memory lead to lower prospective memory performance in young children and old adults. Moreover, the relative contributions of the retrospective memory and purely prospective memory processes are not uniform at both ends of the lifespan, i.e., in later adulthood the purely prospective memory processes seem to determine performance to an even greater extent than in childhood. Nevertheless, age effects were also observed in the retrospective component which thus contributed to the prospective memory performance differences between the age groups.