This study examines two views of lexical storage and word production, a derivational hypothesis and an independent unit hypothesis. Reaction times and errors were related to derivational complexity. A model of lexical retrieval process incorporating derivational processes is proposed. (Author/SW)

Examines, through an investigation of the effect of word frequency on lexical decision, alternative views of how the internal lexicon is structured and searched. A model is developed based on two internal lists: one a ready-access list, the other a complete list. (Author/AM)

Describes an experiment to test two assumptions concerning what is stored in the memory with regard to sentence structure: (1) that the linear effect observed is based on a tally model rather than on an integrationist mechanism; (2) that this linear effect is not uniquely the result of a mechanism operating at comprehension. (CLK)

A phoneme confusion matrix consisting of 1,620 spontaneous speech errors was analyzed. It is shown that there is no tendency for linguistically unmarked consonants to replace marked consonants and that sound segment errors almost always involve the movement of unitary segments and not the movement of component distinctive features. (SW)