title: Darwinian algorithms and the Wason selection task: a factorial analysis of social contract selection task problems.
abstract: In four experiments with 760 subjects, the present study examined Cosmides' Darwinian algorithm theory of reasoning: specifically, its explanation of facilitation on the Wason selection task. The first experiment replicated Cosmides' finding of facilitation for social contract versions of the selection task, using both her multiple-problem format and a single-problem format. Experiment 2 examined performance on Cosmides' three main social contract problems while manipulating the perspective of the subject and the presence and absence of cost-benefit information. The presence of cost-benefit information improved performance in two of the three problems while the perspective manipulation had no effect. In Experiment 3, the cost-benefit effect was replicated; and performance on one of the three problems was enhanced by the presence of explicit negatives on the NOT-P and NOT-Q cards. Experiment 4 examined the role of the deontic term "must" in the facilitation observed for two of the social contract problems. The presence of "must" led to a significant improvement in performance. The results of these experiments are strongly supportive of social contract theory in that cost-benefit information is necessary for substantial facilitation to be observed in Cosmides' problems. These findings also suggest the presence of other cues that can help guide subjects to a deontic social contract interpretation when the social contract nature of the problem is not clear.
authors.affiliation: Department of Psychology, University of Florida, Gainesville 32611.
authors.forename: R D
authors.initials: RD
authors.lastname: Platt
authors.forename: R A
authors.initials: RA
authors.lastname: Griggs
mesh_terms: D000328:Adult; D000465:Algorithms; D003071:Cognition; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D011340:Problem Solving; D012931:Social Environment; D012932:Social Facilitation; D013647:Task Performance and Analysis