Working memory load attenuates the match effect in sentence-picture verification.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Linguistics

Background:

• Embodied cognition theories propose that language meaning is grounded in the body's perceptual and motor systems.
• The sentence-picture verification (SPV) shape match effect, where shape congruity aids verification, has supported this view.
• Replication failures challenge the necessity of sensorimotor simulation for language comprehension.

Purpose of the Study:

• To investigate whether sensorimotor simulation is an obligatory component of language comprehension.
• To examine the role of working memory resources in modulating the SPV shape match effect.
• To explore the flexibility of sensorimotor simulation based on task demands.

Main Methods:

• Participants performed the SPV task under varying working memory loads.
• Auditory and visual information were concurrently held in working memory to manipulate load.
• The SPV shape match advantage was measured under different load conditions.

Main Results:

• Increased working memory load, both auditory and visual, significantly reduced the SPV shape match advantage.
• The typical facilitation observed when sentence-implied shapes matched pictured object shapes was attenuated.
• This indicates that sensorimotor simulation is not always engaged during language comprehension.

Conclusions:

• Sensorimotor simulation is not a mandatory process for understanding language.
• The engagement of sensorimotor systems during language comprehension may depend on the availability of working memory resources.
• Language comprehension processes can be flexible, adapting to cognitive load and task demands.