Social Studies, 20.03.2020 16:56, hiiliohi3823
When a researcher asks the question, "Have subjects been pre-selected so as to represent the extremes on the variable of interest?", she is concerned with which one of the following potential threats to internal validity?
A. Regression effect
B. Subject selection
C. Testing effect
D. Maturation
Answers: 2
Social Studies, 22.06.2019 11:30, artistictype4671
Why do you think that wilson 14 point plan was not put into practice
Answers: 2
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