title: Perfecting research techniques in an imperfect world: response to MacWhinney & Snow.
abstract: Edwards (1992c) concerns data and data use rather than manuals. It presents principles to facilitate reliable archive research in an imperfect world. MacWhinney & Snow (1992) endorse the principles but disagree on important details, discussed in this response. M&S underrate the impact of corpus inconsistencies on substantive conclusions. Since acquisition research concerns events which often trickle in a few at a time, main findings often involve a handful of examples, so overlooking a single early variant can seriously skew results. Until archives become perfect, if they do, type-token listings can help in identifying variants before computer search and avoiding this hazard.
authors.affiliation: Institute of Cognitive Studies, University of California, Berkeley 94720.
authors.forename: J A
authors.initials: JA
authors.lastname: Edwards
mesh_terms: D002663:Child Language; D002675:Child, Preschool; D016208:Databases, Factual; D005260:Female; D006801:Humans; D007804:Language Development; D008297:Male; D012107:Research Design / Q000592:standards*; D014706:Verbal Learning