Why do researchers use a control group?

If researchers are conducting a study that involves naturalistic observation, simply observing participants in a public setting, they do not need to obtain informed consent

What is the DEPENDENT variable(s) in the following hypothesis:  “We predicted that female offenders would score higher than male offenders on a survey of substance abuse, while male offenders would score higher than female offenders on a survey of anger.”

When it comes to measuring variables, which of the following best describes the meaning of validity?

Which of the following characterizes the ethical principle of beneficence?

A study of aggression in children was conducted by having 2 research assistants observe children’s behavior on a playground and record the number of times they saw an aggressive behavior and the type of aggressive behavior that occurred.  Afterward, the research assistants compared their ratings to see if they were similar.  This is an example of examining their:

A researcher developed a new measure of intelligence. She then administered her new I.Q. test and an existing popular I.Q. test to a group of research participants. She found that participants who scored high on her new measure of intelligence also scored high on the existing popular I.Q. test, and that participants who scored low on her new measure of intelligence scored low on the existing popular I.Q. test.  This demonstrates that her new test has _____.

What is the DEPENDENT variable(s) in the following hypothesis? “Persons who experience economic deprivation during early childhood will place a higher priority on economic self-interest later in life than will people who did not experience economic deprivation during early childhood.”

A researcher administered a new personality test to a group of participants.  Two weeks later, he gave the same participants the same test and compared their scores from the first time they took the test to the second. He was clearly interested in the test’s _____.

There are three global categories of research designs; which of the following is NOT one of them?