Abstract
The effects of orientation, obliqueness and position in a triad on mirror-image reversal discrimination by 5- and 6-yr.-old Ss were assessed. Discrimination was facilitated when the triangles were in an upright position, e.g., the horizontal line was at the bottom of the figure. Within a triad of triangles position had a significant effect. The reversed triangle was more distinct when the two identical triangles were beside each other. Obliqueness did not influence mirror-image reversal discrimination.

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