Revised and abridged version of You Can't Learn without Goofing (An Analysis of Children's Second Language Errors')'' to appear in Jack Richards (ed.), Error Analysis -- Perspectives in Second Language Acquisition,'' (Longmans). A goof'' is a productive error made during the language learning process. (RS)

It is argued here that childhood phonological errors systematically simplify the child's inventory of phonetic elements and strings. (Author/KM)

Data is presented in support of the assertion that the interlanguage hypothesis should be extended from adult second language acquisition settings to those non-simultaneous child language acquisition settings where the major sociolinguistic variable is the absence of peers who are native speakers of the target language. (Author/RM)