When machines are used to measure dependent variables in observational studies,which of the following needs is reduced?
A) the need for internal validity
B) the need for random sampling
C) the need for construct validity
D) the need for interrater reliability

Question

Quizplus · Accepted Answer

When machines are used to measure dependent variables in observational studies, the need for interrater reliability is reduced as there is no need for multiple observers to measure the same variable. The machine provides a consistent and reliable measurement, thus reducing the need for interrater reliability. The need for internal validity, random sampling, and construct validity still remain important in observational studies.

When Machines Are Used to Measure Dependent Variables in Observational