Which of the following is an advantage of using a multiple group experiment over a simple experiment?

If a treatment effect exists

Counterbalancing is used

In the above figure, the pattern of results indicates (hint: draw lines between each type of symbol, to form a “perfect” X)

Experimenter A and Experimenter B do essentially the same experiment, but when analyzing the results, Experimenter A uses a .05 level of significance, whereas Experimenter B uses a .01 level of significance. Which is most likely to make a Type 2 error?

You have a friend who has wrestled for years with an addiction to beauty queen pageants. According to her boyfriend, their relationship is on the rocks, she is depressed, and she has spent all of her savings. You desperately desire to help your friend out, but don’t know where to turn. You initially think to call a therapist, but you’re not sure if your friend could afford the fees. Just then, however, you happen to switch on the TV and see that kindly old Dr. Phil is offering his service for individuals just like your friend on a “Chasing the Crown” episode of his television show … for free! Your heart soars, and you get ready to call your friend. However, you also remember reading about some data that was recently published by a PLNU research group on the psychological treatment of beauty queens. You dig up the web site and find that students had measured self-reported “Well-being” of beauty queens after one of four different types of intervention. Some queens took part in a Dr. Phil TV Show when PLNU students were in the audience, and other queens had a private session with Dr. Phil. Still other beauty queens saw a therapist while PLNU students watched from the corner of the room (to simulate a studio audience); and a final group of beauty queens saw a non-Dr. Phil-therapist in a private session. The following are their average ratings of well-being: Dr. Phil Therapist With PLNU Audience 2 2 Without PLNU Audience 4 9   Given what you know about 2×2 Factorial Designs, answer the following questions using complete sentences: a. What is the simple main effect of Therapist Personality (i.e. who is conducting the therapy session) when an audience of PLNU students are watching the session?

If neither the experimenter nor the participant knows if the drug the participant is taking is a placebo or “the real thing,” this method of eliminating experimenter bias is called:

As the sample size increases:

A major disadvantage of between subjects designs is that

Which of the following is NOT a prerequisite for establishing causality with the simple experiment?