______ is the extent to which differences observed in the study can be unambiguously attributed to the experimental treatment itself, rather than to other factors.
A) Internal validity
B) External validity
C) Elimination of rival plausible explanations
D) Ecological validity

Question

Quizplus · Accepted Answer

Internal validity refers to the degree to which the observed effects in a study can be directly attributed to the intervention or treatment being tested, rather than to other variables or factors.

______ Is the Extent to Which Differences Observed in the Study