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Which of the following is a threat to internal validity found in a within-groups design but NOT an independent-groups design?

A researcher in theory-testing mode focuses on ________, while a researcher in generalization mode focuses on ________. 

Which of the following variables would be the best independent variable in an experiment? *Hint: think ethically and plausibly

Dr. Factors is conducting a 2 x 4 factorial design. How many factors are in his study?

In the case of a factorial design, another term for independent variable is _________.

A researcher finds that for female applicants, the likelihood of being hired for a job increases as their work experience increases. However, for male applicants, the likelihood of being hired decreases as their work experience increases, meaning the relationship between likelihood of being hired and work experience depends on gender. This finding would suggest __________.

Dwayne has a hypothesis that darkness makes people more aggressive. To test this, he brings people into the lab. The first 10 participants who come to the lab are put into a dark room with no lights. The next 10 participants who come to the lab are put into a fully lit room. He then measures how hard they hit a punching bag. What is the problem with his experiment?

How does random assignment work in a repeated measures design?

Regression to the mean is problematic in which of the following situations?

Use the following information and table to answer questions 38 and 39. To study the effects of physical discomfort on attention, Dr. Lopez conducted the following study: A group of participants were required to keep one hand submerged in cold water (52 degrees). Half of the participants kept their hand in the water for 2 minutes, and half of the participants kept their hand in the water for 4 minutes. In addition, half of the participants were given a placebo pill and told it would reduce the pain of the water (pain relief expected). The other half were given a placebo pill and told that it would have no effect (no pain relief expected). While their hands were in the water, participants were asked to watch a video where a ball is quickly passed between and underneath three cups. At the end of the video, participants were asked to indicate under which cup the ball could be found. The time (in seconds) it took for participant to pick the correct cup was recorded (as a measure of whether they were paying attention). The results are below.   Using factorial notation, what type of design is this?