Abstract
In a recent commentary on Clancy and Hoyer (1993), Hellige (1994) offered an alternative interpretation for the observed right visual field/left-hemisphere (RVF/LH) advantage for skilled subjects in the speed of detecting small featural differences in domain-specific visual images. Because there was a RVF/LH advantage in the accuracy of detecting target-probe differences only in the difficult condition, Hellige suggested that spatial frequency differences between easy and difficult probes could account for the findings. In reply to Hellige′s comments, we argue that the obtained pattern of results can be attributed to hemispheric asymmetries at a conceptual or knowledge representational level, because only skilled observers exhibited a RVF/LH advantage in the speed of detecting featural disparity.
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