The set of varied conditions that the experimenter imposes on the subjects is referred to as the
a. independent variable.
b. treatment variable.
c. experimental variable.
d. extraneous variable.
e. a, b, and c
Ques. 2Experimental designs differ mainly in
a. number of independent variables.
b. method of assigning subjects to treatments.
c. number of pre-measurements of the dependent variable.
d. a and b
e. a, b, and c
Ques. 3In order to apply the law of the single significant independent variable to a study, a researcher should
a. choose a single test for the dependent variable.
b. determine which single test is most related to the independent variable by using several tests as possible dependent variable.
c. determine which single variable makes the most difference by varying the independent variable in many different ways.
d. establish two groups that are as alike as possible, except one is exposed to the independent variable while the other is not.
Ques. 4Indicate whether the following statements refer to internal validity or external validity. Does this experiment represent reality?
a. internal validity b. external validity.
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