On the Validity of the Portable Rod-and-Frame Test

Abstract
Kato (1965) and Morris (1967) have reported correlations between stationary Rod-and-frame Tests (RFT; Witkin, Lewis, Hertzman, Machover, Meissner, & Wapner, 1954) and portable versions of their own design of .77 and .74, respectively. However, Vaught (1969) reports a correlation between a commercially available version and a stationary RFT of .44 for men, .41 for women, and .46 over-all.

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