Hands typing what hands do: Action-semantic integration dynamics throughout written verb production

Area of Science:

• Cognitive Neuroscience
• Psycholinguistics
• Motor Control

Background:

• Action verb processing engages motor networks, established in receptive language.
• Integration of action semantics during written production and its timing remain unexplored.
• Crosstalk between motor planning and execution in action verb semantics is poorly understood.

Purpose of the Study:

• To investigate action-semantic integration during written word production using a novel typing paradigm.
• To examine the temporal dynamics of motor planning and execution in relation to action verbs.
• To explore the role of effector compatibility and processing time in action verb semantics during typing.

Main Methods:

• Developed an "action semantics in typing" paradigm to time keystroke operations during word typing.
• Utilized a primed-verb-copying task with manual action verbs, non-manual action verbs, and non-action verbs.
• Measured motor planning via first-letter lag and execution dynamics via whole-word lag.

Main Results:

• Action verbs differentially delayed motor planning and execution phases.
• Longer processing (over 1s) showed strong, effector-compatible interference during planning, but weak, effector-blind interference during execution.
• Shorter processing (<900ms) showed reduced, effector-compatible interference during planning and fading interference during execution.
• Prime-target congruency facilitated typing regardless of verb motor content.

Conclusions:

• Action verb semantics extend beyond embodied representations, influencing conceptual dynamics.
• Findings support non-radical models of language embodiment and event coding theory.
• Typing dynamics reveal novel insights into the interplay of semantics, motor control, and language production.