Which of the Following Statements About Treatment Impact as an Indicator

Multiple Choice

Which of the following statements about treatment impact as an indicator of internal validity in single-case research is FALSE?

A) A large impact is more indicative of validity than is a small impact.
B) A treatment that has an immediate impact is more likely to be valid than one that has a delayed impact.
C) A treatment that has long-term effects is more likely to be valid than one that has only short-term effects.
D) A treatment is more likely to be valid if it results in changes in an acute problem rather than a chronic problem.