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The role of line junctions in object recognition: The case of reading musical notation
Yetta Kwailing Wong1, Alan C-N Wong2
1Department of Educational Psychology, The Chinese University of Hong Kong, Rm 308, Ho Tim Building, Shatin, NT, Hong Kong. yetta.wong@cuhk.edu.hk.
Abstract:
Previous work has shown that line junctions are informative features for visual perception of objects, letters, and words. However, the sources of such sensitivity and their generalizability to other object categories are largely unclear. We addressed these questions by studying perceptual expertise in reading musical notation, a domain in which individuals with different levels of expertise are readily available. We observed that removing line junctions created by the contact between musical notes and staff lines selectively impaired recognition performance in experts and intermediate readers, but not in novices. The degree of performance impairment was predicted by individual fluency in reading musical notation. Our findings suggest that line junctions provide diagnostic information about object identity across various categories, including musical notation. However, human sensitivity to line junctions does not readily transfer from familiar to unfamiliar object categories, and has to be acquired through perceptual experience with the specific objects.
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