Finger-number interaction: an ideomotor account

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human-Computer Interaction

Background:

• Emerging evidence suggests numerical magnitude processing interacts with motor control.
• Goal-directed movements may mediate the link between numerical cognition and action.
• Understanding these interactions is crucial for cognitive architectures and human-computer interfaces.

Purpose of the Study:

• To investigate number-finger interactions using a response-effect (R-E) learning paradigm.
• To determine if ideomotor principles explain the association between numerical magnitude and perceived actions.

Main Methods:

• A learning phase involved participants reading consonant-vowel (CV) syllables paired with finger movements (opening/closing).
• A transfer test required participants to name CV syllables in response to small or large number stimuli.
• Response times were measured to assess interference effects in number-action associations.

Main Results:

• A significant interference effect was observed: participants responded slower to large magnitude numbers.
• This slowdown occurred specifically when the number-response mapping was incompatible with learned finger movements (e.g., large number with grip closure).
• The findings support the role of anticipated sensory consequences in linking numerical meaning to action perception.

Conclusions:

• Ideomotor principles effectively explain the observed number-finger interactions.
• Anticipated magnitude codes mediate the relationship between numerical meaning and action perception.
• This research provides insight into the cognitive mechanisms underlying number-action associations.