An impairment which should result in inconsistent performance across repeated testing. An impairment affecting the access of an item in the input lexicons.
However, these patients may not recognize their productions as non-words due to impaired comprehension and self-monitoring skills. Thus a normally little-used but nevertheless inherent component of cognition could be released into accelerated activity under circumstances of lexical access difficulties subsequent to brain damage (Buckingham 1987). It is important to note that the random generator manipulates phonological material at a level dissociated from meaning, i.e. it handies general phonological information that is separate from the specific sets of phonemes associated with words in the lexicon.