Self-splitting objects in rapid visuomotor processing: Behavioral evidence from response force measures F Schmidt, T Schmidt, A Weber |
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Department of Experimental Psychology, University of Kaiserslautern, Germany
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| We studied the processing of self-splitting objects in the time-course of response force measures. We simultaneously presented two central prime triangles (one inverted). Participants responded to peripheral target triangles (one inverted) that followed the primes with varying stimulus onset asynchronies (SOA). The participant was asked to indicate the position of the (inverted) target triangle that was either on the same (consistent trials) or other side (inconsistent trials) as the (inverted) prime triangle. Primes were occluded by zero to three overlapping shapes such that the visual system was exceedingly challenged in extracting the triangle shapes. We obtained priming effects in response time and response force between consistent and inconsistent trials that were modulated by the number of occluding shapes. We analyze our results with respect to behavioral rapid-chase criteria that test for sequential (feedforward) processing in online measures of motor control. Our findings show that objects are split into their components early on in the time course of visual processing. However, this rapid visuomotor processing of self-splitting objects is not based on pure feedforward processes. |
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