Which research design tests groups of subjects of different ages, all at the same time?

The tendency of a group discussion to strengthen the dominant positions held by individual group members is known as _____

A) social facilitation. B) group polarization C) groupthink D) social loafing

Imagine the following correlation: The more overweight the child, the slower his or her running speed. Given only this information, which of the following could be true?

a. Being overweight causes children to run slower. b. Children who are slow runners are at a higher risk of being overweight. c. Having respiratory problems (such as asthma) as a child can cause children to run slower and to become overweight. d. Both A and B are possible. e. All of the above could explain the correlation — the researcher would need to do more to find out if any are actually true.