Poster F111, Tuesday, March 28, 8:00 – 10:00 am, Pacific Concourse
Edinburgh Handedness Inventory as a measure of motor imagery ability, not just handedness
Christopher Madan1,2, Christopher Donoff2, Anthony Singhal2; 1Boston College, 2University of Alberta
The Edinburgh Handedness Inventory (EHI) has become a staple in the neuroimaging literature as a measure of handedness, due to the relationship between handedness and cerebral lateralization of language function. However, a large part of the literature has demonstrated that the EHI is not a unidimensional construct. Item analyses indicate that several questions of the EHI are either highly collinear, and thus do not contribute unique variance, or introduce measurement error. As a test of handedness, it is important to acknowledge that the EHI is a test of hand preference, rather than of skill in overt movements. Specifically, the EHI can be described as asking participants to imagine tool-related interactions, and make subjective judgments of how the participant would interact with the object. Here we demonstrate that in addition to indexing handedness, the EHI also serves as a measure of inter-individual ability in movement imagery. We suggest that questions demonstrating low consistency may be useful in measuring motor imagery ability, distinct from its ability to index handedness.
Topic Area: METHODS: Other