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Weird past tense forms*

Published online by Cambridge University Press:  26 September 2008

Fei Xu*
Affiliation:
Massachusetts Institute of Technology
Steven Pinker*
Affiliation:
Massachusetts Institute of Technology
*
Institute for Research in Cognitive Science, University of Pennsylvania, 3401 Walnut Street, Suite 400C, Philadelphia, PA 19104–6228[email protected]
E10-016, MIT, Cambridge, MA 02139[email protected].

Abstract

It is often assumed that children go through a stage in which they systematically overapply irregular past tense patterns to inappropriate verbs, as in wipe-wope, bring-brang, trick-truck, walk-has walken. Such errors have been interpreted both as reflecting over-use of minor grammatical rules (e.g. ‘change i to a’), and as reflecting the operation of a connectionist pattern associator network that superimposes and blends patterns of various degrees of generality. But the actual rate, time course, and nature of these errors have never been documented. We analysed 20,000 past tense and participle usages from nine children in the CHILDES database, looking for overapplications of irregular vowel-change patterns, as in brang, blends, as in branged, productive suffixations of -en, as in walken, gross distortions, as in mail-membled, and double-suffixation, as in walkeded. These errors were collectively quite rare; children made them in about two tenths of one per cent of the opportunities, and with few stable patterns: the errors were not predominantly word-substitutions, did not occur predominantly with irregular stems, showed no consistency across verbs or ages, and showed no clear age trend. Most (though not all) of the errors were based closely on existing irregular verbs; gross distortions never occurred. We suggest that both rule-theories and connectionist theories have tended to overestimate the predominance of such errors. Children master irregular forms quite accurately, presumably because irregular forms are just a special case of the arbitrary sound-meaning pairings that define words, and because children are good at learning words.

Type
Articles
Copyright
Copyright © Cambridge University Press 1995

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Footnotes

[*]

This research was supported by NIH Grant HD 18381 and NSF Grant BNS 91–09766 to the second author, and by the McDonnell—Pew Center for Cognitive Neuroscience at MIT. We thank Gary Marcus for comments, and Michael Ullman and Marie Coppola for technical assistance.

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