The effects of multiple script priming on word recognition by the two cerebral hemispheres: Implications for...

Area of Science:

• Cognitive neuroscience
• Psycholinguistics
• Neuroscience of language

Background:

• Discourse comprehension relies on integrating information over time.
• Hemispheric specialization may influence how world knowledge is used to understand text.
• Script contexts provide a framework for understanding common situations.

Purpose of the Study:

• To investigate the roles of the left hemisphere (LH) and right hemisphere (RH) in discourse processing.
• To test the ability of each hemisphere to use script contexts for word recognition.
• To examine how script information is maintained across intervening text.

Main Methods:

• Participants performed lexical decisions on target words.
• Target words were preceded by script primes (single or combined scripts).
• Six prime conditions varied script relatedness and inclusion of filler text.

Main Results:

• The LH showed facilitation only with related scripts or related scripts preceded by unrelated scripts.
• The RH demonstrated significant facilitation across all script prime combinations.
• The RH maintained script facilitation even with intervening filler or unrelated scripts.

Conclusions:

• The RH plays a critical role in discourse comprehension by sustaining widespread meaning activation.
• This RH function is crucial for integrating information and achieving global coherence.
• Hemispheric differences in maintaining contextual information impact text understanding.