Abstract
Discrepant findings have been reported during recent years on the effect of set size in number conservation tasks. The purpose of this paper is to bring a rapprochement between the conflicting sets of findings by considering the problem of response criteria. Subjects for the study consisted of 168 children aged four-six years. The results obtained indicated that the performance difference between small and large number conservation tasks was significant with judgments-only criteria but not with judgments-plus-explanations criteria. It was concluded that the discrepant findings are due partly to a lack of consensus among different investigators concerning the appropriate response criteria for inferring the presence of Piagetian concepts.
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