The two most important techniques for eliminating potential rival hypotheses are
a. random assignment of participants and use of control groups.
b. random assignment of participants and use of pretests.
c. use of pretests and control groups.
d. random selection of participants and random assignment of participants.
Suppose you conduct an experiment and find that the probability of obtaining your results by chance alone was 3 (.03). Your decision, if your research is like most psychological research, should be to
a. reject the null hypothesis.
b. accept the null hypothesis.
c. reject the alternative hypothesis.
d. use a different dependent variable.
Which of the following is another term for dependent variable?
a) interacting variable
b) predictor variable
c) criterion variable
d) restricting variable
Ann divides her classes into two groups a treatment group and a non-treatment group to test whether her new method of teaching subtraction is better than her old method. This is an example of what type of research?
a) historical
b) quasi-experimental
c) correlational
d) experimental research
Which of the following is the LEAST important characteristic of a good control group?
a. its members experience everything the experimental group experiences except the treatment
b. it has the same number of participants as the experimental group
c. it is equivalent to the experimental group in all important characteristics
d. it is measured on the same dependent variable as the experimental group
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