Proceedings of the Annual Meeting of the Cognitive Science Society

We investigated whether metacognitive suggestions alone can function as a means of encouraging recipients’ reflec-tion and facilitate hypothesis revision. We also examined whether it is necessary to ground the suggestions on the recipients’thinking processes for the facilitative effects. 108 participants were assigned to one of the four conditions: metacognitivesuggestion collaboration with/without grounding support; free collaboration; and sole. They were asked to engage in a rulediscovery task. The task was designed so that hypothesis revision was necessary for the participants to find the correct rule.The results showed that performance both in the free collaboration and in the metacognitive suggestion collaboration withgrounding support conditions was higher than that in the solo condition. We concluded that metacognitive suggestions alonecan facilitate hypothesis revision as well as free collaboration and that grounding support is necessary for the facilitative effectto be obtained.