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Published on: January 4, 2013
Predictive inferencing in adults with right hemisphere brain damage
M T Lehman-Blake1, C A Tompkins
1Department of Communication Science and Disorders, University of Pittsburgh, PA, USA. mblake@syr.edu
Summary
Adults with right hemisphere damage (RHD) can make predictive inferences, especially when information is recent. However, their inference maintenance is less robust than in non-brain-damaged individuals.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Linguistics
Background:
- Right hemisphere damage (RHD) can impact higher-level cognitive functions, including discourse comprehension.
- Predictive inferencing, the ability to anticipate upcoming information, is crucial for understanding narratives.
- Previous research suggests potential deficits in inferencing following RHD.
Purpose of the Study:
- To investigate the capacity for predictive inferencing in adults with RHD.
- To examine how recency of information and working memory affect inference generation and maintenance in RHD.
- To compare inferencing abilities between adults with RHD and non-brain-damaged (NBD) controls.
Main Methods:
- 13 adults with RHD and 11 NBD adults read narrative stimuli designed to elicit specific predictive inferences.
- Narrative-final sentences either confirmed or disconfirmed the predicted inference.
- Reading times for final sentences were measured as an indicator of inference generation (slower times suggest inference).
Main Results:
- Adults with RHD successfully generated predictive inferences when inference-related information was recently presented.
- The RHD group showed evidence of inference maintenance over time, though less effectively than the NBD group.
- Better auditory comprehension and working memory capacity correlated with improved inference maintenance in the RHD group.
Conclusions:
- Individuals with RHD can perform predictive inferencing, particularly under conditions of recent information.
- Inference maintenance in RHD is influenced by working memory and auditory comprehension abilities.
- Findings contribute to understanding the role of the right hemisphere in discourse comprehension and inferencing.
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