The normalities and abnormalities associated with speech in psychometrically-defined schizotypy

Area of Science:

• Neuroscience
• Psychology
• Linguistics

Background:

• Schizotypy, a personality trait associated with schizophrenia, is often linked to speech deficits.
• These deficits are hypothesized to arise from limited cognitive resources.

Purpose of the Study:

• To investigate if speech deficits in individuals with schizotypy are exacerbated by cognitive load.
• To examine objective speech measures during low versus high cognitive demand tasks.

Main Methods:

• Objective, computer-based speech analysis (production, variability, content) was used.
• Speech data were collected from individuals with psychometrically-defined schizotypy (n=39) and controls (n=37).
• Tasks varied in cognitive demand to assess performance under different loads.

Main Results:

• Contrary to hypotheses, the schizotypy group did not exhibit more pathological speech characteristics than controls.
• Cognitive load generally reduced speech expressivity for all participants.
• Individuals with schizotypy showed some healthier speech aspects and trend-level better performance under high cognitive load.

Conclusions:

• The findings challenge the notion that speech deficits in schizotypy are solely due to limited cognitive resources.
• There appears to be a mismatch between self-reported schizotypal traits and objective performance.
• Speech in individuals with high schizotypy demonstrates resilience under cognitive stress.