1) Which of the following must be found in order to observe an effect of the...
1) Which of the following must be found in order to observe an effect of the independent variable in an experiment ?
A. high between group variance
B. High error variance
C. high standards deviations
D. high group means
2) what kind of validity is threatened when we cannot generalized the results of the study?
A. construct validity
B. External validity
C. Internal validity
D. Statistical validity
3) which cofounding variable is most likely to occur when participants are selected because their pretest measures were abnormally high?
A. testing
B. regression to the mean
C. selection
D. attrition
4) in within-subjects designs, the unwanted effects due to the influence of one condition on the following conditions called..
A. attrition effects
B. carry-over effects
C. positive practice effect
D.negative practice effects
Homework Answers
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