The internal validity of a measure involves the extent to which
A) the effects of an experiment are truly due to conditions the researcher intended to manipulate.
B) different observers of the same behavior agree.
C) the results of a study hold when studies are conducted with different participants and different methods.
D) participant's performance is similar on two or more occasions.

Question

Quizplus · Accepted Answer

Internal validity refers to the degree to which a study accurately measures the variable(s) it claims to be measuring. In other words, it measures what it intends to measure. Option A specifically refers to the extent to which the effects of an experiment are truly due to the conditions that the researcher intended to manipulate, which is a key aspect of internal validity.

The Internal Validity of a Measure Involves the Extent to Which