1. HATA, Y. 1973 A study of the effect of verbal labelling in concept learning (II) Conceptual knowledge, abstraction ability and reversal. Japanese Journal of Educational Psychology, 21, 116-121.(In Japanese)
2. JOHNSON, P. J., & WHITE, R. M., Jr. 1967 Concept of dimensionality and reversal shift performance in children. Journal of Experimental Child Psychology, 5, 223-227.
3. KENDLER, H. H., KENDLER, T. S., & MARKEN, R. S. 1969 Developmental analysis of reversal and half-reversal shifts. Developmental Psychology, 1, 318-326.
4. KENDLER, H. H., KENDLER, T. S., & SANDERS, J. 1967 Reversal and partial reversal shifts with verbal material. Journal of Verbal Learning and Verbal Behavior, 6, 117-127.
5. NEIMARK, E. D. 1974 Natural language concept: Additional evidence. Child Development, 45, 508-511.