Extra Credit for Participation in Research Studies on College Campuses

Multiple Choice

Extra credit for participation in research studies on college campuses is very common. Dr. Lawrence carried out several studies earlier in the year that helped develop the current studies she is conducting. Many of the participants in her current study were a part of the studies earlier in the year. She was very surprised to see how enthusiastic participants were in current assessment. It appears that exposure to the previous assessment changed the participants reaction to the current assessment. This is most likely due to:

A) carryover effects.
B) instrumentation.
C) practice effects.
D) fatigue effects.