To test _______(a)_______ effect, you may want to ask: “Did some unanticipated e

Question

To test _______(a)_______ effect, you may want to ask:

“Did some unanticipated event occur while the experiment was in progress and did these events affect the measurement?” If your answer to this question is ‘yes’, then your experiment suffers from _____(a)____ effect.

To test ___(b)_______ effect, you can ask:

“Were changes in the dependent variable due to normal developmental processes operating within the subject as a function of time?” If your answer to this question is ‘yes’, then your experiment suffers from _____(b)____ effect.

To test _____(c)_______ effect, you may ask:

“Did some participants drop out? Did this affect the results?” If your answer to this question is ‘yes’, then your experiment suffers from _____(c)____ effect.

To test _______(d)______ effect, you may ask:

“Did about the same number of participants make it through the entire study in both experimental and control groups?” If your answer to this question is ‘no, then your experiment suffers from _____(d)____ effect.

To test _______(e)______ effect, you may ask:

“Did the pre-test (i.e., measurement before treatment) affect the scores on the post-test (i.e., measurement after treatment)?” If your answer to this question is ‘yes’, then your experiment suffers from _____(e)____ effect.

To test _______(a)_______ effect, you may want to ask:

“Did some unanticipated event occur while the experiment was in progress and did these events affect the measurement?” If your answer to this question is ‘yes’, then your experiment suffers from _____(a)____ effect.

Explanation / Answer

a) HIstory

b)Maturity

c) Experimental Mortality

d) Experimental Mortality

e) Testing

http://www.indiana.edu/~educy520/sec5982/week_9/520in_ex_validity.pdf

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