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- Semantic errors arise early while accessing lemmasfrom a semantic-conceptual input, while phonological errors arise late when accessing phonological forms from lemmas.
pubmed.ncbi.nlm.nih.gov/11529522/
Although PPA is distinct from the better understood stroke-induced aphasias, one common characteristic is the production of phonological paraphasias (production errors where phonemes are omitted, added, or substituted in a target word).
Participants with mixed anomia showed facilitation after both semantic categorical and associative cues, but individuals with lexical-phonological anomia only after categorical cues. Crucially, semantic cues were ineffective for participants with lexical-semantic anomia.
Dec 31, 2006 · In mixed substitution errors the intrusion is both semantically and phonologically related to the target (e.g. 13 and 14). W e find mixed errors far more often
Phonemic paraphasias are a common presenting symptom in aphasia and are thought to reflect a deficit in which selecting an incorrect phonemic segment results in the clear-cut substitution of one phonemic segment for another. The current study re-examines the basis of these paraphasias.
The shape of speech errors also supports fundamental assumptions in phonology. For example, the single phoneme effect states that most sound errors involve a single segment, and not sequences or features (Nooteboom 1969; Shattuck-Hufnagel 1983), giving psychological reality to phonological segments.
Phonemic errors (when the identity of the target item is not present in any position in the repetition) are classified as substitution, omission, and addition while order errors (refer to the movement of the target to nontarget position in the output attempt) are classified as migration.
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The error learning analysis involved a three-way mixed factor ANOVA applied to the rTOT proportion measure, with Group entered as a between participants factor and Time (short, long) and Strategy (phonological, semantic) as within-participants factors.
