Abstract
We investigated whether or not the instruction for conflict frequency in each visual-field modulates the compatibility effect (CE). Previous studies with stimulus-response compatibility paradigm demonstrated that the probability for compatible/incompatible trials modulates CE. Thus, high probability for compatible trial leads to the enhancement of CE. In our experiment, forty right-handed participants were divided into two groups. Both the groups were given the flanker task in which they were identified a target among 5-letter strings that was presented to a left or right visual-field. The appearance probability for compatible trials was 50 % in each visual-field. While one group was told that the appearance probability for one visual-field was three times as that of the opposite. Another group did not receive this instruction. Results showed that CE in each visual-field was invariable in both the groups. These suggested that intention derived from the instruction does not modulate CE.
