Pupil size and problem solving

Pupil size changes were monitored during the solution of various types of problems. A number of solution and response strategies were required of the subject. There was strong confirmation of the theory that this autonomic index can provide a sensitive measure of the fluctuating levels of attention and arousal, which are associated with the various aspects of information processing and response.     

Automatic mediation in group problem solving

Conflicts over allocation of speaking time often occur in both formal and informal conferencing. In a problem solving experiment, an automatic mediator resolved conflicting requests during telephone conferencing. It combined inputs signaling intention to speak, using preprogrammed rules that then selected the new speaker. Teams of four undergraduate students repeatedly called upon the mechanism to resolve conflicting requests. Participant and mechanism behavior were recorded for later evaluation by a protocol analysis program that checked data strings for correct syntax, simulated behavior of alternative resolution rules, and aggregated group and individual data for processing with a statistical package. This approach to group experimentation yields significant methodological advantages in terms of verification of correct experiment administration, reduction in experimenter effects, and promotion of self-direction by participants.     

The effect of problem size on representation in deductive problem solving

Adult Ss attempted to solve logical deductive reasoning problems that varied systematically in amount of information presented. Methods Ss employed in representing the problem were classified into five main types or modes. The proportion of Ss using a matrix mode of problem representation increased moderately with problems containing large amounts of information. The performance of Ss using a matrix mode of representation suggested that this advantage is related to ease of applying and/or storing the results of logical operations in such a problem space rather than to any facilitative effects of encoding processes. Specific limits to normal processing are hypothesized.     

Conformity effects in memory as a function of group size,dissenters and uncertainty

In two experimental studies we investigated how false memory reports provided by anonymous group members affect individuals' recognition. Participants were presented with a series of salient and non‐salient objects and recognition memory was subsequently assessed for presented and non‐presented stimuli. In this recognition test, participants were confronted with (in)correct responses from bogus group members. The findings indicate that the bogus answers influenced memory reports only in the absence of a clear recollection and if the stimulus was not judged to be particularly memorable. Moreover, we found no evidence that motivational influences affected participants' judgements. However, the influence of the bogus group decreased with the presence of dissenters who broke the unanimity of the group, and it increased with higher uncertainty. Copyright © 2002 John Wiley & Sons, Ltd.     

Field dependence as a limiting factor in solving a complex learning problem

Subjects in a prior study of complex learning often experienced difficulty in mastering the task because of an apparent reluctance to release one perceptual field and reconstrue the task on a higher cognitive level. It was hypothesized that were this the correct explanation, the faster learners would be more field independent on a measure of field dependence, since independence has been defined in terms of ease in releasing one's attention from the immediate perceptual field. This hypothesis was tested with 22 undergraduate subjects for whom Group Embedded Figures Test scores were correlated with the number of trials to completion on the complex learning task. A moderate but significant correlation supported the hypothesis.     

Problem solving as a function of extraversion and masculinity

The present study aimed at investigating the differences in performance on five problem solving tasks in terms of extraversion-introversion and masculinity-femininity of 48 University males and females assigned to meet the requirements of a 2 × 2 × 2 between group factorial design. While the first four problems were solved with a time limit, and then the scores combined to obtain a composite index, in the fifth, the index of performance was both number of trials and time taken to solve the problem. The data were analyzed by ANOVA. The findings are: (i) Introverts are superior to extraverts on the composite performance index of the first four problems. (ii) On the fifth problem (i.e. problem squares) the male subjects performed significantly better than their female counterparts. (iii) A highly significant personality × sex role × sex interaction revealed that in males extraversion determines the level of performance, i.e. introverts perform better than extraverts regardless of their scores on masculinity-femininity; and in females masculinity boosts the performance of the extraverted group, and femininity hinders the performance of this group. (iv) When males and females were matched on E-I and M-F, the expected sex differences failed to emerge.