The article “Rate of Stuttering Adaptation Under Two Electro-Shock Conditions” (Behavior Research Therapy, 1967: 49–54) gives adaptation scores for three different treatments: (1) no shock, (2) shock following each stuttered word, and (3) shock during each moment of stuttering. These treatments were used on each of 18 stutterers, resulting in SST = 3476.00, SSTr = 28.78, and SSBI = 2977.67.
a. Construct the ANOVA table and test at level .05 to see whether the true average adaptation score depends on the treatment given.
b. Judging from the F ratio for subjects (factor B), do you think that blocking on subjects was effective in this experiment? Explain.
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