Practice in Identifying Variables
Practice in Identifying Variables
1. One-half of the general psychology students complete computer simulations. The remaining half of the students spent an equal amount of time reviewing the text and their lecture notes. Both groups were then tested on the course information.
a. What is the hypothesis? ___________________________________________
b. What is the control group? ____________________________________________
c. What is the experimental group? _______________________________________
d. What is the independent variable? ______________________________________
e. What is the dependent variable? _______________________________________
2. One-half of a fraternity at NC State watched the television program, “The Day After”. The program was a dramatic presentation of a nuclear holocaust. The remaining members of the fraternity watched programs on one of the other major networks during the same time period. The fraternity members were then individually interviewed regarding their attitudes toward nuclear disarmament.
a. What is the hypothesis? ___________________________________________
b. What is the control group? ____________________________________________
c. What is the experimental group? _______________________________________
d. What is the independent variable? ______________________________________
e. What is the dependent variable? _______________________________________
3. Two groups of rats are run in a maze with a food reward. The time that it takes for each rat to reach the goal box is recorded. One groups of rats is deprived of food for 24 hours before being run on the maze. The other group is fed 1 hour before the maze trials. All other conditions for the two groups are the same.
a. What is the hypothesis? ___________________________________________
b. What is the control group? ____________________________________________
c. What is the experimental group? _______________________________________
d. What is the independent variable? ______________________________________
e. What is the dependent variable? _______________________________________
4. A psychology teacher allowed his third period class to eat snacks while taking an exam. His fourth period class was not allowed to eat snacks while taking the same exam. He compared the test averages from both classes. Prior to this, both classes averaged comparable exam scores.
a. What is the hypothesis? ______________________________________________
b. What is the control group? ___________________________________________
c. What is the experimental group? ______________________________________
d. What is the independent variable? _____________________________________
e. What is the dependent variable? _______________________________________
5. Four groups of rats were being conditioned to elicit an escape-avoidance response. Groups 1, 2, and 3 were given 10, 15, and 20 volts of shock respectively. Group 4 was given no shock. All other conditions were the same for each group. The time is took for each rat to elicit an escape-avoidance response was recorded.
a. What is the hypothesis? ______________________________________________
b. What is the control group? ___________________________________________
c. What is the experimental group? ______________________________________
d. What is the independent variable? _____________________________________
e. What is the dependent variable? _______________________________________
6. The leading producer of paper products wants to increase their sales of paper cups. They set up a test program in local supermarkets. Identical 8 ounce paper cups were packaged in two ways—half of the stock was packaged in the present plain boxes, while the other half of the stock was packaged in bright, cheery, pastel-colored boxes. Sales volumes for each type of package were recorded over a period of six months.
a. What is the hypothesis? ______________________________________________
b. What is the control group? ___________________________________________
c. What is the experimental group? ______________________________________
d. What is the independent variable? _____________________________________
e. What is the dependent variable? _______________________________________
Operational Definitions:
1. A group of scientists believe that women find men without earrings more attractive than men with earrings.
a. What is the independent variable? ____________________________
b. What is the dependent variable? _______________________________
c. Propose an operational definition for the dependent variable. ________________
___________________________________________________________________
2. A team of scientists is testing the hypothesis that young women look in the mirror more than older women.
a. What is the independent variable? ____________________________
b. What is the dependent variable? _______________________________
c. Propose an operational definition for the dependent variable. ________________
___________________________________________________________________
3. A group of scientists are testing the hypothesis that people learn more when they study in a quiet versus a noisy place.
a. What is the independent variable? _____________________________________
b. What is the dependent variable? _______________________________________
c. Propose an operational definition for the dependent variable. ________________
___________________________________________________________________
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