Match following statements with correct term:
1. Extreme scores return towards average.
2. Participants’ responses are altered by an event outside the control or interest of the study.
3. More participants decline to continue from one group or condition than from another.
4. Participant’s future performance is changed because of interaction with a measure.
5. Participant behavior changes spontaneously over time.
6. The way the researcher measures a variable changes over the course of an experiment.
A. history threat
B. maturation threat
C. instrumentation threat
D. testing threat
E. attrition threat
F. regression threat
