Span and rate of apprehension in children and adults

Michelene T.H. Chi, David Klahr

Research output: Contribution to journalArticlepeer-review

148 Scopus citations


Children and adults quantified random patterns of dots, under unlimited exposure duration. For adults and children two distinct processes appear to operate. For adults the quantification of collections of from one to three dots is essentially errorless, and proceeds at the rate of 46 msec per item, while the quantification rate for from 4 to 10 dots is 307 msec per dot. For children the same operating ranges appear to hold, however children are much slower. The lower slope is 195 msec per dot, while the upper is 1049. Although the results for adults and children are similar except for the overall rates, the nature of the isomorphism between children and adults is unclear.

Original languageEnglish (US)
Pages (from-to)434-439
Number of pages6
JournalJournal of Experimental Child Psychology
Issue number3
StatePublished - Jun 1975
Externally publishedYes

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology


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