Abstract
This paper makes a comparative analysis between spontaneous speech errors and some conduction aphasic utterances made by two patients. The results and suggestions are as follows : (i)The frequency of contextual errors by normal speakers are three times higher than non-contextual errors, whereas the tendency is reversed in conductive aphasic errors ; (ii) the phonological environment of the interacting elements as well as similarlities between errors and sources should be considered seriously when we postulate the “Phonological Level” and “Phonetic Level”. The author suggests that patients are capable of building a phonological frame (e. g. sequence of morae slots for intended words) as evidenced by two observations : that addition errors tend to occur between bimoraic foot boundaries with high regularity ; and substitution errors seem to occur between two morae with identical vowels.
