Gesture-speech synchrony in schizophrenia: A pilot study using a kinematic-acoustic analysis

Area of Science:

• Neuroscience
• Psychiatry
• Linguistics

Background:

• Social functioning impairment is a core, persistent feature of schizophrenia.
• Abnormal non-verbal behaviors are noted in schizophrenia, but gesture-speech temporal coordination is understudied.
• Understanding communication deficits is crucial for treating schizophrenia.

Purpose of the Study:

• To investigate gesture-speech synchrony in schizophrenia using a dynamical systems framework.
• To explore a novel approach for assessing communication skill disorders in schizophrenia.
• To analyze temporal coordination between gestures and speech in individuals with schizophrenia.

Main Methods:

• The study employed continuous kinematic-acoustic analysis for the first time in schizophrenia research.
• Participants included 28 individuals with schizophrenia and 24 matched healthy controls.
• Gesture-speech synchrony was assessed during spontaneous speech and a sensorimotor synchronization task.

Main Results:

• Spontaneous gesture-speech synchrony was preserved in the schizophrenia group.
• Intentional finger tapping-speech synchrony was impaired in individuals with schizophrenia.
• The schizophrenia group showed greater finger tapping-syllable uttering asynchronies and reduced coordination stability.

Conclusions:

• Schizophrenia may involve specific deficits in information processing delays, particularly in explicit functions.
• Impaired intentional sensorimotor synchronization highlights a key area of dysfunction.
• Investigating intrapersonal coordination offers insights into brain-behavior dynamics in schizophrenia.