Imageability Effects on Sentence Judgment by Right Brain-Damaged Adults

Lederer, Lisa and Gibbs Scott, April and Tompkins, Connie and Dickey, Mike (2008) Imageability Effects on Sentence Judgment by Right Brain-Damaged Adults. [Clinical Aphasiology Paper]

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Abstract

The effect of right hemisphere damage on imagery generation was tested using a previously validated sentence verification task. While subjects with right hemisphere-damaged (RHD) took longer than controls to reject false sentences regardless of whether this judgment required imagery generation, their response time deficit on High-imagery items was less than that on Low imagery items, suggesting that they have a deficit in recognizing non-imageable knowledge and/or a heightened tendency to engage in imagery generation in response to verbal stimuli. A post hoc analysis also suggested that the group with RHD was selectively impaired in motor, rather than visual, imagery generation.

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