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Peer reviewedDe Lisi, Richard; Smith, Jeffrey K. – Applied Psychological Measurement, 1979
The reliability of Oltman's Portable Rod and Frame Test (PRFT) was assessed using 60 first-, third-, and fifth-grade children. Various reliability estimates ranged from .90 to .97. Age and sex differences were also examined. (Author/BH)
Descriptors: Age Differences, Cognitive Style, Cognitive Tests, Elementary Education
