British Journal of Psychology
Volume 41 Issue 1‐2 (September 1950), Pages 1-94
AN ITEM‐ANALYSIS OF THE ISHIHARA TEST (pages 52-62)
- Author(s): R. W. PICKFORD
- Published 13 Apr 2011
- DOI: 10.1111/j.2044-8295.1950.tb00260.x
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