Major threats to validity in a "pretest & posttest with one experimental group only" are:
A) History,maturation,main testing,interactive testing,mortality.
B) Statistical regression,maturation,main testing,interactive testing,mortality.
C) Statistical regression,instrumentation,main testing,interactive testing,mortality.
D) History,instrumentation,main testing,interactive testing,mortality.
Correct Answer:
Verified
Q3: History effects (the dropout of individuals from
Q4: One way of controlling "nuisance" variables is
Q6: External validity of lab experiments refers to
Q7: There is a trade-off between internal validity
Q8: Biases that might affect the internal validity
Q11: Internal validity refers to the extent of
Q13: A key problem of time series is
Q14: Manipulation of independent variables in order to
Q15: Cause-and-effect inferences can be contaminated by the
Q17: An interactive testing effect occurs when the
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