1. BOGARTZ, W. 1965 Effects of reversal and nonreversal shifts with CVC stimuli. Journal of Verbal Learning and Verbal Behavior, 4, 484-488.
2. GOULET, L. R. 1971 Basic issues in reversalshift behavior. A reply to Kendler and Kendler. Psycological Bulletin, 75, 286-289.
3. GOULET, L. R., & WILLIAMS, K. G. 1970 Children's shift performance in the absence of dimensionality and a learned representational response. Journal of Experimental Child Psychology, 10, 287-294.
4. KENDLER, H. H., & KENDLER, T. S. 1962 Vertical and horizontal process in problem-solving. Psycological Review, 69, 1-16.
5. KENDLER, H. H., & KENDLER, T. S. 1968 Mediational and conceptual behavior. In K. W. Spence, & J. J. Spence (Eds.) Psychology of learning and motivation. Vol.2, Pp.197-244, New York, Academic Press.