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Original Articles

Target-Size Influences on Reaction Time with Movement Time Controlled

, , , &
Pages 239-261 | Received 10 May 1980, Published online: 13 Aug 2013
 

Abstract

The variables that affect motor programming time may be studied by changing the nature of the response and measuring the subsequent changes in reaction time (RT). One notion of motor programming suggests that aiming responses with reduced target size and/or increased target amplitude require more “complex” motor programs that require longer RTs. In a series of five experiments in which movement time (MT) was experimentally varied, target size neither influenced RT when the movement amplitude was 2 or 30 cm nor when the target sizes differed by as much as a factor of 16:1. Increasing the movement amplitude from 15 to 30 cm also had no influence on RT. Movement time, however, did affect RT, with 200-msec movements having longer RTs than 120-msec movements. Target size and movement amplitude did not appear to be factors that influence programming time or program complexity.

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