Ex post facto research is the only recourse when there is an
a. active dependent variable. c. attribute dependent variable.
b. active independent variable. d. attribute independent variable.
Ques. 2Choose the internal validity problem that is associated with the situations listed. Entirely a function of the passage of time
a. history
b. maturation
c. experimenter effect
d. statistical regression
e. diffusion
Ques. 3A major difference between experimental research and ex post facto research is that
a. in experimental research there are two or more groups of subjects to be compared, while in ex post facto research one group of subjects is being studied.
b. a test of significance is applied to the data collected in an experiment, while descriptive-type statistics are used to analyze data collected in an ex post facto research.
c. in experimental research the researcher is always testing a hypothesis, while in ex post facto research hypothesis testing is not involved.
d. in experimental research manipulation of variables is possible, while in ex post facto it is not possible to manipulate the variables.
Ques. 4Choose the internal validity problem that is associated with the situations listed. Presence of the observer increases scores.
a. history
b. maturation
c. experimenter effect
d. statistical regression
e. diffusion
Ques. 5A limitation of ex post facto research is that
a. null hypotheses cannot be tested.
b. random sampling is not possible.
c. behavioral observations are difficult and time consuming.
d. comparison groups cannot be used.
e. generalizations concerning cause and effect are difficult to justify.
Ques. 6Choose the internal validity problem that is associated with the situations listed. Extreme scores move toward the mean.
a. history
b. maturation
c. experimenter effect
d. statistical regression
e. diffusion
Ques. 7Which of the following is not possible in ex post facto research?
a. Measurement
b. Observation
c. Random sampling
d. Random assignment
e. Selection
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