Suppose you obtained the following results in a multiple baseline design assessing the impact of family therapy on tantrums, chores, and truancy in treating one child and his parents. Which interpretations is/are plausible?
A) History could NOT have caused the change.
B) The intervention may have had generalizable effects.
C) History is the only plausible cause of the change.
D) Maturation caused the change.

Question

Suppose you obtained the following results in a multiple baseline design assessing the impact of family therapy on tantrums, chores, and truancy in treating one child and his parents. Which interpretations is/are plausible?​ 
A) ​History could NOT have caused the change. 
B) The intervention may have had generalizable effects.​ 
C) History is the only plausible cause of the change.​ 
D) Maturation caused the change.​

Quizplus · Accepted Answer

The multiple baseline design provides evidence that the intervention was associated with a decrease in tantrums, chores, and truancy. The design also controls for threats to internal validity, such as history and maturation, although it cannot eliminate these threats entirely. Additionally, the multiple baseline design is well-suited for demonstrating generalizable effects of the intervention. Therefore, interpretation B is plausible. Interpretations A, C, and D are not supported by the available evidence.

Suppose You Obtained the Following Results in a Multiple Baseline