Susan conducts a study to determine which method is most effective in treating depression. Each participant receives two months of behavioral therapy, two months of cognitive therapy, and two months of humanistic therapy using a completely counterbalanced design. Susan finds that whatever type of therapy is last produces the most benefits. Susan has encountered a problem known as
A) experimenter bias.
B) order effects.
C) demand characteristics.
D) social desirability.

Question

Quizplus · Accepted Answer

Order effects occur when the order in which treatments are administered affects the outcome, as seen in Susan's study where the last therapy always shows the most benefits.

Susan Conducts a Study to Determine Which Method Is Most