The basic-operations hypothesis predicts that for any transformation which is composed of more than one basic operation, there exists a class of errors in children's speech correctly analyzed as failure to apply one (or more) of the operations specified in the adult formulation of the rule. (Author/CTM)

If the basic operations hypothesis (EJ 184 227) is interpreted as a general principle governing acquisition of all movement rules, it may obscure the fact that children distinguish between unbounded and local rules. Error patterns support this distinction, lending credence to theories with separate status for the two rule types. (Author/RD)

Goodluck and Solan (EJ 205 641) presented alternative formulations about why errors predicted by basic operations fail to occur and suggested a refined hypothesis. Each aspect of their argument is addressed, and it is concluded that descriptive power, methodology and principles for restricting error predictions favor our original analysis. (RD)

The comprehension of sentences expressing instigative causation was investigated in children aged two to four speaking English, Italian, Serbo-Croatian, and Turkish. Cross-linguistic differences in development revealed the roles of morphological and syntactic devices in processing these constructions. The word order systems of English and Italian…