-49 TABLE II F AND T RATIOS OF FIVE DESIGN SUBGROUPS ON TOTAL EVEN SCORE OF OBSERVATION INSTRUMENT Total Even Score Subgroups F Ratio d.f. 02<01 2.6555 11 05<04 3.6957 12 02<04 0.4630 12 05<01 11.3356 ** 11 T Ratio d.f. 02<03 0.563 12 * confidence level 0.05 ** confidence level 0.01 One subgroup discriminated significantly between the experimental and control groups. Hypothesis II was not rejected. While only one subgroup discriminated significantly, by using the sign test the probability is less than .05 that all five differences would be in the same direction.