True/False
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
Correct Answer:
Verified
Q7: The manipulation of the independent variable is
Q8: One way of controlling "nuisance" variables is
Q9: A key problem of time series is
Q10: External validity of lab experiments refers to
Q11: History effects (the dropout of individuals from
Q13: An interactive testing effect occurs when the
Q14: Biases that might affect the internal validity
Q15: There is a trade-off between internal validity
Q16: A Quasi-Experimental Design guarantees the maximum internal
Q17: A time series design thus allows the