In an experiment in a school the researcher is also the teacher administering the conditions. The situation introduces which potential threat to validity?
A) Experimenter
B) Placebo
C) John Henry
D) Instrumentation

Question

Quizplus · Accepted Answer

The potential threat to validity introduced in this situation is the experimenter effect. As the researcher is also the teacher administering the conditions, they may unintentionally influence the results of the experiment through their expectations or behavior towards the students in each condition.

In an Experiment in a School the Researcher Is Also