Dr. Hoff is curious as to whether children in a kindergarten classroom will be friendlier after talking about friendship. Immediately before and after the discussion, she has several undergraduate research assistants code the "friendliness" of a group of kindergarteners. Which of the following threats should Dr. Hoff be most concerned about?
A)History
B)Maturation
C)Instrumentation
D)Testing

Question

Quizplus · Accepted Answer

Instrumentation is a concern because the measurement of "friendliness" could be subjective and vary between the undergraduate research assistants before and after the discussion. This variability in how friendliness is coded could affect the reliability of the results.

Dr Hoff Is Curious as to Whether Children in a Kindergarten