Exam 1: Tiinking Critically With Psychological Science

To assess the impact of test difficulty on persistence of effort, researchers plan to give one group of children relatively easy tests and another group more difficult tests. To reduce the chance that the children in one group are more intelligent than those in the other group, the researchers should make use of

On average, Caryl's school bus arrives on time, although sometimes it is a bit early or late. If the arrival times are distributed on a normal curve, which of the following statistics would enable Caryl to estimate the probability that her bus will arrive within 5 minutes of its scheduled arrival time on any given day?

Psychologists report that genders differ in their risk of

Which method offers the most reliable way of assessing whether athletic performance is boosted by caffeine consumption?

By testing their predictions with the observational method of science, psychologists are using a(n)

Psychologists study animals because

Suppose that people who watch a lot of violence on TV are also particularly likely to behave aggressively. This relationship would NOT necessarily indicate that

To determine whether the strength of people's self-esteem is related to their income levels, researchers would most likely make use of

During the season, four members of the Salem baseball team made 4, 2, 6, and 4 home runs, respectively. For this distribution of home runs, the standard deviation is equal to the square root of

Which procedure is most likely to be used to control for possible confounding variables?

Psychologists study animals because

What is the median of the following distribution of scores: 1, 3, 7, 7, 2, 8, 4?

In an effort to prevent participants in an experiment from trying to confirm the researchers' predictions, psychologists sometimes

An inert substance that may be administered instead of a drug to see if it produces any of the same effects as the drug is called a

If the correlation between the physical weight and reading ability of children is +0.85, this would indicate that

Which of the following would be best for determining whether alcohol impairs memory?

Which of the following is NOT characteristic of a normal curve?

A normal curve would be LEAST likely to characterize a large random sample of

In generalizing from a sample to the population, it is important that

As the size of a representative sample increases, the ________ of that sample is most likely to decrease.