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Abstract
This thesis explores the eld of natural language grammar induction as applied to psy-cholinguistic comparison. It specically concentrates on one algorithm, the ADIOS algorithm.After a discussion of language, grammar and grammar induction methods, it describes theADIOS algorithm, and presents experiments done on the induction and comparison of gram-mars from small corpora, with the goal of inferring linguistic manifestations of learning dis-abilities. Results show that the grammars used by the groups in question are largely similar,with one exception indicating possible dierences in the grammatical consistency of normalvs. learning disabled populations. Suggestions are made regarding the future usefulness ofsuch methods in the study of cognition and cognitive dierences.