Different effects of verbal and visual working memory loads on Language prediction

Area of Science:

• Cognitive Psychology
• Neuroscience
• Psycholinguistics

Background:

• Working memory (WM) is increasingly recognized for its role in language prediction during speech comprehension.
• However, the specific impact of different types of WM loads on language prediction remains incompletely understood.

Purpose of the Study:

• To investigate whether verbal and visual working memory loads differentially affect language prediction during speech comprehension.
• To elucidate the distinct contributions of verbal and visual-spatial WM to predictive language processing.

Main Methods:

• A dual-task paradigm employing eye-tracking in a visual world setting with 48 participants.
• Concurrent verbal (visual words) and visual-spatial (visual dots) working memory load tasks during sentence comprehension.
• Analysis of anticipatory eye movements to assess prediction of upcoming linguistic information.

Main Results:

• Evidence of anticipatory gaze towards target objects, indicating prediction of linguistic information.
• Working memory load significantly disrupted language prediction effects.
• Verbal WM load caused a more substantial disruption to language prediction than visual WM load.

Conclusions:

• Working memory resources are critically involved in predictive language processing.
• Verbal and visual-spatial working memory subtypes play differential roles in language prediction.
• These findings offer novel insights into the cognitive mechanisms underlying predictive speech comprehension.