Using transitional information in sign and gesture perception

Area of Science:

• Cognitive Science
• Linguistics
• Neuroscience

Background:

• Transitional movements in sign languages are visually accessible.
• These movements may offer predictive information for upcoming linguistic input.

Purpose of the Study:

• To investigate how deaf signers and hearing non-signers utilize transitional information for target detection.
• To explore the relationship between motor imagery ability and the use of transitional cues in sign recognition.

Main Methods:

• Participants viewed videos of pseudosigns and grooming gestures with intact, blurred, or static transitional information.
• Target detection times were measured across different video conditions.
• Motor imagery abilities were assessed.

Main Results:

• Both signers and non-signers used movement transition cues (blurred vs. static videos).
• Only signers utilized transitional handshape information for linguistic stimuli (normal vs. blurred videos).
• Motor imagery abilities did not differ, but non-signers used it as a predictive strategy.

Conclusions:

• Deaf signers leverage transitional movement and handshape cues for efficient sign recognition.
• Signers employ linguistic knowledge to interpret transitional handshapes for prediction.
• Non-signers may use motor imagery for prediction, distinct from signers' linguistic strategies.