LIBERTY UNIVERSITY PSYCH 255 EXAM #3 QUIZZES WITH COMPLETE SOLUTIONS.

LIBERTY UNIVERSITY PSYCH 255 EXAM
#3 QUIZZES WITH COMPLETE
SOLUTIONS.
posttest-only design ANS - 1. obtain two equivalent groups of participants

2. introduce the IV

3. measure the effect of the IV on the DV



internal validity ANS - when the results of an experiment can confidently be attributed to the effect of
the IV



what is the difference b/t posttest-only & pre-test-posttest design? ANS - in the latter a pretest is given
before the experimental manipulation



the possibility of participants dropping out of the experiment is? ANS - Mortality or attrition



what design are different participants assigned to each of the conditions using random assignment?
ANS - independent group design



what is another name for independent group design and why? ANS - between-subjects design

- because comparisons are made b/t different groups of participants



an experiment with two conditions-- each participant is assigned to both levels of the IV is: ANS -
repeated measures design



order effect ANS - the order of presenting the treatments affects the dependent variable.



what is a Latin Square? ANS - a limited set of orders constructed to ensure that:

1. each conditions appears at each ordinal position