Exam 2: Psychologys Scientific Method

Skinner discovered that a pigeon will peck at a button more often if the pecking is rewarded with a food pellet. In Skinner's study, the food pellet is the ________ variable.

The group of participants observed in a research study are referred to as the

An experimenter wants to study the relationship between caffeine and reaction time. She assigns participants as follows: Group One receives 100 mg of caffeine; Group Two receives 200 mg of caffeine; Group Three receives 300 mg of caffeine; and, Group Four receives no caffeine. Twenty minutes later all participants complete the reaction-time test. Which group is the control group?

Variables are elements of research which

In a set of numbers, the mode is the number that divides the distribution in half when the numbers are arranged from lowest to highest.

Surveys, case studies, and interviews are all a part of ________ research.

We can predict participants' scores on Variable A with perfect accuracy by knowing their scores on Variable B. Higher scores on Variable A are associated with higher scores on Variable B. What is the correlation coefficient for the correlation between Variables A and B?

In a formal experiment, the group that is NOT subjected to a treatment condition is referred to as the ________ group.

What does the size of a correlation coefficient indicate?

If you find no relationship between two variables, what is the correlation coefficient?

In scientific research, the group which receives treatment is called the ________ group.

In terms of statistical significance, what is considered to be the minimum level of probability that scientists will accept for concluding that observed differences are real and not due to chance?

Which of the following is an example of a case study?

Mean, median, and standard deviation are examples of ________ statistics.

For which of the following would a survey be LEAST useful?

When using inferential statistics, the researcher learns

Although research has shown that it takes approximately thirty minutes for an aspirin to have an effect on the body, most people report that their headaches begin to fade after only about ten Minutes. What is the best explanation for this finding?

You work for a business that has many employees whose salaries range from $22,000 to nearly $400,000 for the top executives. Your boss tells you that your next raise can be based on The mean, median, or mode. You currently make $28,000 a year. Which measure should you Choose?

You believe that working women are happier than women who do not work outside the home. You predict that working women are less socially isolated than women who work at home. You have just formulated two

In an experiment, the control group is the