1. Prof J F Affleck-Graves and Mr H J Blomerus, Graduate Business School, University of Cape Town, Bondebosch, 7700, Republic of South Africa. The authors would like to acknowledge the financial assistance rendered by the Human Sciences Research Council (HSRC). Opinions expressed and conclusions arrived at are those of the authors and should not be regarded as those of the HSRC. The authors would also like to thank an anonymous referee for useful suggestions concerning the use of the repeated measures...