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Semantic processing of iconic signs is not automatic: Neural evidence from hearing non-signers
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Semantic processing of iconic signs is not automatic: Neural evidence from hearing non-signers
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Semantic processing of iconic signs is not automatic: Neural evidence from hearing non-signers
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Journal Article
Semantic processing of iconic signs is not automatic: Neural evidence from hearing non-signers
2025
Overview
Iconicity facilitates learning signs, but it is unknown whether recognition of meaning from the sign form occurs automatically. We recorded ERPs to highly iconic (transparent) and non-iconic ASL signs presented to one group who knew they would be taught signs (learners) and another group with no such expectations (non-learners). Participants watched sign videos and detected an occasional grooming gesture (no semantic processing required). Before sign onset, learners showed a greater frontal negativity compared to non-learners for both sign types, possibly due to greater motivation to attend to signs. During the N400 window, learners showed greater negativity to iconic than non-iconic signs, indicating more semantic processing for iconic signs. The non-learners showed a later and much weaker iconicity effect. The groups did not differ in task performance or in P3 amplitude. We conclude that comprehending the form-meaning mapping of highly iconic signs is not automatic and requires motivation and attention.
