Question

In an experiment on the effects of emotional images on memory performance, a researcher presents half of her participants with a set of pleasant positive images (such as kittens and children playing), then tests their recognition memory for the images, then presents the same group with a set of disturbing images (dead bodies and wounded limbs) and then tests that half for recognition memory for those images. For the other half of her participants, she presents first the disturbing images, tests their recognition memory, then the pleasant images, and then recognition memory. What kind of research design is this?

a.Posttest only

b.Pretest-posttest

c.Concurrent measures

d.repeated measures

In an experiment on the effects of emotional images on memory performance, a researcher presents half of her participants with a set of pleasant positive images (such as kittens and children playing), then tests their recognition memory for the images, then presents the other half of her participants with a set of disturbing images (dead bodies and wounded limbs) and then tests their recognition memory for those images. What kind of research design is this?

a.Posttest only

b.Pretest-posttest

c.Concurrent measures

d.Repeated measures

Answer 1

Correct Answer - A

In this experiment, the participants are exposed to two independent variables 1. Pleasant positive images, 2 Disturbing images. But, each group is exposed to only one independent variable, so it is not concurrent measures design. There is no pretest before exposing the participants to the independent variable, nor the experiment is repeated. So it is not repeated measures nor it is pretest- posttest design. This is a post test only design because the participants are exposed to an independent variable and the effect is measured on the memory.