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Hand mental rotation is not systematically altered by actual body position: Laterality judgment versus same-different
Nady Hoyek1, Franck Di Rienzo, Christian Collet
1Centre de Recherche et d'Innovation sur le Sport-CRIS EA 647, Université Claude Bernard-Lyon I, 27-29 Boulevard du 11 Novembre 1918, 69 622, Villeurbanne Cedex, France, nady.hoyek@univ-lyon1.fr.
Attention, Perception & Psychophysics
|October 31, 2013
Summary
Mental rotation of body parts can use egocentric or allocentric strategies. This study found hand posture and biomechanical constraints only affected one-hand laterality judgments, suggesting task-dependent strategy use.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Motor Control
Background:
- Mental rotation of body parts is often assumed to involve an egocentric strategy, where individuals imagine their own body part moving.
- Previous research indicates hand posture can influence hand mental rotation, but this effect is not always consistent.
- Stimulus features or experimental paradigms can shift strategy use towards visual and allocentric approaches.
Purpose of the Study:
- To investigate the influence of hand posture and biomechanical constraints on mental rotation tasks involving body parts and control stimuli.
- To determine if egocentric strategies are consistently employed during body part mental rotation or if task-specific strategies are utilized.
- To explore the relationship between task type (laterality judgment, same-different judgment) and strategy selection.
Main Methods:
- Participants performed one-hand and two-hand mental rotation tasks (laterality judgment and same-different judgment, respectively).
- Control tasks involved mental rotation of alphanumeric symbols.
- The study manipulated hand posture and introduced biomechanical constraints during the tasks.
Main Results:
- Effects of hand posture and biomechanical constraints were significant only for the one-hand laterality judgment task.
- Response times for the two-hand same-different mental rotation task were influenced by the angular disparity between stimuli.
- No significant effects of posture or biomechanical constraints were found for the alphanumeric symbol control tasks.
Conclusions:
- The findings suggest that different mental rotation tasks recruit distinct cognitive strategies.
- Egocentric strategies appear to be task-specific, particularly evident in laterality judgment tasks involving one hand.
- Further research is needed to precisely identify the subprocesses of egocentric strategy use for potential applications in assessing motor impairments.
