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. Author manuscript; available in PMC: 2009 Jul 20.
Published in final edited form as: Alzheimers Dement. 2007 Apr;3(2):109–121. doi: 10.1016/j.jalz.2007.02.002

Table 1.

Form equivalencies on key variables

Analysis of Variance Intraclass Correlation
Variable Form 1 Form 2 Form 3 Form 4 Across Forms
M SD M SD M SD M SD p r p
Frequency 87.9 105.9 90.1 109.9 85.7 100.0 83.9 79.57 .99 .99 < .001
Letters 5.0 1.2 4.9 1.7 5.0 1.3 5.1 1.5 .99 .83 < .001
Syllables 1.5 .53 1.5 .53 1.5 .53 1.5 .53 1.0 1.0 < .001
Phonemes 4.0 1.2 3.8 1.3 4.3 1.4 3.9 .99 .82 .85 < .001