Cognitive Flexibility for Semantic and Perceptual Information in Developmental Stuttering

Area of Science:

• Developmental Psychology
• Speech and Language Pathology
• Cognitive Neuroscience

Background:

• Cognitive flexibility is crucial for learning and adaptation.
• Understanding cognitive differences in children who stutter (CWS) is important for early intervention.
• Previous research suggests potential cognitive variations in CWS.

Purpose of the Study:

• To investigate cognitive flexibility in preschool children who stutter (CWS) versus children who do not stutter (CWNS).
• To compare performance on tasks requiring shifts between semantic and perceptual information.
• To analyze reaction time and accuracy as measures of cognitive flexibility.

Main Methods:

• Participants included 44 CWS and 44 CWNS aged 3;0 to 5;11.
• Cognitive flexibility was assessed using semantic and perceptual categorization tasks.
• Children matched target objects to semantic or perceptual associates, with reaction time and accuracy recorded.

Main Results:

• Accuracy in shifting between semantic and perceptual representations was comparable between CWS and CWNS.
• CWS exhibited significantly slower reaction times than CWNS when shifting cognitive representations.
• Both groups found switching between perceptual representations more challenging than semantic ones.

Conclusions:

• Preschool children who stutter (CWS) are less efficient (slower) in cognitive flexibility than their non-stuttering peers.
• This difference in efficiency extends to both verbal (semantic) and nonverbal (perceptual) domains.
• While accuracy is maintained, the processing speed for cognitive shifts is impacted in CWS.