Wagner et al. (1988)used an interrupted times series design to examine changes in worker productivity after the institution of a worker incentive plan. In addition to measuring productivity, they also examined other information in order to rule out alternative explanations of their results. They were able to rule out _______ because _______.
A)history; no significant event occurred around the time of the program's start
B)instrumentation; the manner of measuring productivity didn't change
C)selection; of an absence of significant worker turnover
D)all of the above

Question

Quizplus · Accepted Answer

Wagner et al. (1988) ruled out history, instrumentation, and selection as alternative explanations by ensuring no significant events occurred, maintaining consistent measurement methods, and having no significant worker turnover.

Wagner Et Al