Independent race of colour and word can predict the Stroop effect
Version of Record online: 29 FEB 2012
© 2012 The Australian Psychological Society
Australian Journal of Psychology
Volume 64, Issue 4, pages 189–198, December 2012
How to Cite
Eidels, A. (2012), Independent race of colour and word can predict the Stroop effect. Australian Jnl of Psychology, 64: 189–198. doi: 10.1111/j.1742-9536.2012.00052.x
- Issue online: 19 NOV 2012
- Version of Record online: 29 FEB 2012
- Received 14 February 2011. Accepted for publication 20 December 2011.
- independent channels;
- redundant-target effect;
Mainstream theories of the Stroop effect suggest that faster colour classification on congruent trials (say, the word RED printed in red colour) relative to incongruent trials (GREEN in red) is due to channel interaction. Namely, information from the irrelevant word channel perturbs processing of the print colour, causing in turn slower processing of incongruent displays. In this note, I advance a new model in which colour and word are processed in parallel and completely independent channels. The Stroop effect is then the outcome of signal redundancy in congruent displays, where both colour and word contribute to the same response. Numerical computations show that the model can produce the Stroop effect (along with high accuracy rates) for a subset of parameter values. Thus, it provides a proof of existence for a separate channel theory, and a challenge to many existing theories.