A psychologist is planning an experiment using a repeated measures design to investigate whether drinking a glucose drink versus water improves performance on a memory task.
Which of the following procedures should the psychologist plan to implement specifically to control for the confounding effect of order effects?
Counterbalancing the order of the drinks across participants
Randomly allocating participants to either the glucose or the water group
Standardising the instructions given to all participants
Using a double-blind design where neither the participant nor the researcher knows which drink is given
