This research was supported by the Norwegian Research Council. The authors have contributed equally, and the names are presented in random order. We thank Ivar Reinvang for discussions regarding the data, and Kristoffer S. Nielsen for providing computer software for identification of peaks and presentations of grand average curves.
Life-span changes in P3a
Article first published online: 6 APR 2004
Volume 41, Issue 4, pages 575–583, July 2004
How to Cite
Fjell, A. M. and Walhovd, K. B. (2004), Life-span changes in P3a. Psychophysiology, 41: 575–583. doi: 10.1111/j.1469-8986.2004.00177.x
- Issue published online: 6 APR 2004
- Article first published online: 6 APR 2004
- (Received September 16, 2002; Accepted November 10, 2003)
The relationship of visual P3a to age was investigated in a life-span sample. The aims of the study were (1) to assess to what extent P3a, relative to P3b, decreases with increasing age; (2) To assess at which recording sites the relationship between P3a and age is strongest; (3) to investigate whether the relationship between P3a and age is best described as linear or nonlinear. One hundred and three well-functioning adults, 20–92 years old, were given a health interview, a battery of neuropsychological tests, and performed a visual three-stimuli oddball ERP task yielding both a P3a and a P3b. P3a and age was moderately correlated, with coefficients reaching .53 (Cz) and −.52 (Pz) for latency and amplitude, respectively. P3b was to a much lesser extent related to age. Generally, the age–P3a relationship was strongest at midline and central electrodes. Finally, the relationship between age and P3a was best described as linear. P3a seems selectively more impaired with age than P3b, but this impairment seems less pronounced at Fz than at Cz and Pz. There is a need for complex theoretical integration of these and previous findings.