4) a Researcher Has Tested Participants in Four Independent Conditions

Multiple Choice

4) A researcher has tested participants in four independent conditions: training, training and feedback, training and reward, control. She wishes to compare the feedback and reward condition against the training and control conditions as an a priori comparison. What coordinates could be used for the linear contrast?

A) -1, -1, 0, 0
B) 1, 1, 0, 0
C) 2, -2, 0, 0
D) 1, 1, -1, -1