A(n) __________ is an organized set of concepts that explains a phenomenon or a set of phenomena.

When articles are submitted to most journals, they are sent out as experts for detailed analyses. This process is known as

Professor Peterson is testing the hypothesis that people will cooperate less when a lot of people are in a group. In the experiment he plans, he will vary the number of people in each group. That will be his

Rahul is serving as a research assistant. In the first phase of the experiment, Rahul gives each participant a can of cola or a can of caffeine-free cola. In the second phase of the experiment, Rahul times the participants with a stopwatch while they play a video game. It sounds like this study is lacking a(n)

Matt is participating in a two-day experiment. On Day 1, he takes a memory test after running on a treadmill for 2 minutes. On Day 2, he takes similar test after running for 10 minutes. The experimenters plan to compare Matt's performance on the two tests. This sounds like a

Shirley visits an antique store. The owner explains to her that the smaller an object is, the more he can charge for it. This is an example of a

Dr. Paul is developing a new measure of hunger. He says, "I need a measure that will accurately predict how much food people will eat in their next meal." Dr. Paul's statement is that the __________ of the measure.

Giovanna is worried that the results of her experiment may be affected by her participants' desire to provide favorable impressions of themselves. It sounds as if she might be using __________ measures.

Ben believes that men are more likely to arrive late to classes than are women. To test this hypothesis most effectively, Ben should use

Before you participate in an experiment, the researcher should provide you with information about procedures, potential risks, and expected benefits. This process is called