Parallel forms of the California Achievement Test were administered in counterbalanced order to 109 students in Grade 4 and 77 in Grade 7. Grade 4 scores for Forms C and D were similar; however, for Grade 7 scores on the two test forms were significantly different. Caution was recommended in their use as parallel test forms.
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References
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CampbellD. T.StanleyJ. C.Experimental and quasi-experimental designs for research. Chicago, IL: Rand McNally, 1963.
2.
CTB/McGraw-Hill.California Achievement Tests—Technical Bulletin 1, Forms C and D, Levels 10–19. Monterey, CA: Author, 1979.
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HowellJ. J.WeinerM.Note on the equivalence of alternate forms of an achievement test. Educational and Psychological Measurement, 1961, 21, 309–313.
