PSYCH 2300 Exam 3 questions n answers 2025/2026

PSYCH 2300 Exam 3 questions n
answers 2025/2026

Maturation threat and prevention - ANS ✔✔Change in participant behavior that happens
spontaneously. Prevention is comparison group



History threat and prevention - ANS ✔✔External event effects most members of the treatment
group at the time of treatment. Prevention is control group



In what type of study does regression to the mean occur and how is it prevented - ANS
✔✔Pretest/posttest, prevention is comparison group



Attrition threat and prevention - ANS ✔✔When only a certain type of participant drops out,
prevention is removal of scores



Testing threat and prevention - ANS ✔✔Change in participants as a result of being tested more
than once. Prevention is to either abandon pretest or use an alternative form of test



Instrumental threat and prevention - ANS ✔✔When a measuring instrument changes over time.
Prevention is to abandon pretest or make sure pre and post tests are scores equivalently



Selection history threat - ANS ✔✔Outside event systematically affects participants at one level
of the IV



Selection attrition threat - ANS ✔✔Only one of the experimental groups has attrition



Observer bias - ANS ✔✔Researcher's expectations influence interpretation of results