Which item is a potential source of internal invalidity?
A) passage of time
B) inconsistent findings across different groups of participants
C) observer disagreement
D) conflicting scores on multiple test days

Question

Quizplus · Accepted Answer

The passage of time can introduce changes in participants or conditions that affect the outcomes of a study, leading to internal invalidity by not being able to attribute changes in the dependent variable directly to the independent variable.

Which Item Is a Potential Source of Internal Invalidity