"Professor Jackson believes that frustration increases the need for achievement. She decided to test her hypotheses with her Intro. Psychology class of about 100 students. The first 50 students who arrive for class one day are taken to a separate room and given a series of easy puzzles to complete. Professor Jackson then asks each student about his or her professional goals. She rates the statement of each on a 7-point scale for strength of achievement motivation.
When they arrive, the remaining students are taken to another room and given a series of difficult puzzles by Professor Jackson's assistant, Jim. Jim asks each student about his or her professional goals and, like Professor Jackson, then rates each statement on a 7-point scale.
The group given the more difficult puzzles has, on average, higher achievement motivation than the group given the easy puzzles. Professor Jackson concludes that her hypotheses is supported."
How would confounding variables make the experiment design flawed? There were 4 other parts, but I got that from the textbook I was given.
You don't need to give me the exact answer, just something to help out? Thanks in advance.
Tags: