Long-term use of a sign language may enhance visual abilities. Deaf signers consistently outscore their hearing nonsigning counterparts on visual memory tests. In a similar vein, the long-term use of a logographic script, Chinese characters appears to boost visual memory. Both learning a sign language and mastering Chinese characters involve a relatively complex task of visual recognition and memory. This review of the literature suggests that daily use of either a sign language, one not based on sound, or Chinese characters, a script which maps language at the word level rather than at the phonemic level, may facilitate recall of visual forms.
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