Seeing stability in a stable-baseline design can help rule out which of the following threats to internal validity?
A) Regression
B) Placebo effects
C) Maturation
D) Both a and c
E) Both b and c

Question

Quizplus · Accepted Answer

Seeing stability in a stable-baseline design helps to control for the threats to internal validity posed by both regression (a) and maturation (c), as the design allows researchers to see if changes in the dependent variable are actually due to the intervention and not just natural variability over time. Placebo effects (b) are not a threat to internal validity in this particular design.

Seeing Stability in a Stable-Baseline Design Can Help Rule Out