Contamination of data occurs when the program evaluator remains in control of the experiment and neither the experimental nor the control groups are exposed to the treatment.
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Q15: The determination of whether any other factors
Q16: Measures of program effectiveness are needed to
Q17: Efficiency measures gauge how quickly the program
Q18: The key feature of the classical experimental
Q19: The purpose of random assignment is to
Q20: Changing the instrument (or measurements) used between
Q21: If any factors other than random assignment
Q23: Reactive effect of pre-testing is when a
Q24: The reactive effect of experimental procedures is
Q25: The quasi-experimental design attempts to ensure the
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