To study the effect of the type of stimulus on memory recall, Zhong subjects participants to either an auditory or visual presentation of a poem. After the presentation, the participants are asked to answer several questions about the poem. Which type of experimental design has Zhong employed?
A. Pretest-posttest
B. Pretest onlyC. One-group posttest
D. Posttest only

D. Posttest only

Explanation:

The Posttest is a test given to students to measure the their achievement and the effectiveness of a program. It is usually administered after they have completes an instructional program or segment and the posttest is often used in addition with a pretest

Hence a post test only design is

A type of true experimental design where test units are randomly allocated to an experimental group and a control group. The experimental group is exposed to a treatment and both groups are measured afterwards.

The posttest-only control group design is a research design in which there are at least two groups, one of which does not receive a treatment intervention (control group) and data are collected on the outcome measure after the treatment or intervention.

The major advantage of the posttest only design is that it gives the best basis for comparison of two groups while not knowing when a participate drops out is disadvantage of using the posttest only method.

Zyong Used the Posttest only method because he divided the group into two and administered a test to them after a presentation.

Answer is D. POSTTEST-ONLY.

Refer below.

Explanation:

POSTTEST-ONLY:

To examine the two-group posttest-only randomized exploratory structure we need an examination that meets the accompanying prerequisites:

-Has two groups.

-Utilizes a post-only measure.

-Has two appropriations (quantifies), each with a normal and variety.

-Evaluate treatment impact = measurable (i.e., non-possibility) contrast between the groups.