This study was supported by a Grant-in-Aid for Scientific Research (C)18530572 from the Japan Society for Promotion of Science and Waseda University Grant for Special Research Projects (2006A-505) to H. Masaki, and by JSPS International Fellowship Program for Research in Japan S-05169 to W. Sommer.
Does the error negativity reflect response conflict strength? Evidence from a Simon task
Version of Record online: 16 APR 2007
Volume 44, Issue 4, pages 579–585, July 2007
How to Cite
Masaki, H., Falkenstein, M., Stürmer, B., Pinkpank, T. and Sommer, W. (2007), Does the error negativity reflect response conflict strength? Evidence from a Simon task. Psychophysiology, 44: 579–585. doi: 10.1111/j.1469-8986.2007.00522.x
- Issue online: 16 APR 2007
- Version of Record online: 16 APR 2007
- (Received June 15, 2006; Accepted January 17, 2007)
- Error negativity (Ne);
- Error detection;
- Response conflict strength;
- Corrective EMG
The error (-related) negativity (Ne or ERN) has been related to detecting the mismatch between incorrectly executed and appropriate responses or, alternatively, to the degree of conflict between different response alternatives. In this study different levels of response conflict were generated by manipulating task difficulty in a Simon task. According to the product of incorrect and subsequent correct EMG activation, the amount of conflict in error trials was indeed larger for the easy than for the hard condition. In contrast, Ne/ERN amplitudes did not differ between difficulty conditions, nor was the amount of conflict mirrored by Ne/ERN amplitude. Therefore, the present data are at variance with the hypothesis that the Ne/ERN reflects the degree of response conflict.