A Free, Voluntary Continuing Education Workshop in EBP Is Offered

Multiple Choice

A free, voluntary continuing education workshop in EBP is offered to practitioners in a large agency. Several months after the workshop is provided, a program evaluator finds that workshop attendees are much more likely to be engaging in EBP than those who did not attend. From this information we can conclude that:

A) the workshop was effective.
B) the difference in outcome might be due to a selectivity bias.
C) the study had a high degree of internal validity.
D) Both a and c are correct.