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The first contrast compares only groups 3 and 4; the others are eliminated by giving them weights of 0.
Next, add the coefficients for groups 3 and 4 so that together they sum to 0.
The second contrast compares groups 1 and 2 with groups 5 and 6. Groups 3 and 4 are eliminated.
Next, groups 3 and 4 are each given coefficients of 0.
So the sum of contrast coefficients will equal 0, groups 5 and 6 receive coefficients of -.5.
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Running the Analysis |