Getting a grip on numbers: Numerical magnitude priming in object grasping
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Number of pages
SourceJournal of Experimental Psychology B-Human Perception and Performance, 33, 6, (2007), pp. 1400-1409
Article / Letter to editor
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SW OZ DCC CO
SW OZ NICI CO
Journal of Experimental Psychology B-Human Perception and Performance
SubjectAction, intention, and motor control; DI-BCB_DCC_Theme 2: Perception, Action and Control
To investigate the functional connection between numerical cognition and action planning, the authors required participants to perform different grasping responses depending on the parity status of Arabic digits. The results show that precision grip actions were initiated faster in response to small numbers, whereas power grips were initiated faster in response to large numbers. Moreover, analyses of the grasping kinematics reveal an enlarged maximum grip aperture in the presence of large numbers. Reaction time effects remained present when controlling for the number of fingers used while grasping but disappeared when participants pointed to the object. The data indicate a priming of size-related motor features by numerals and support the idea that representations of numbers and actions share common cognitive codes within a generalized magnitude system.
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