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Detailed explanation-1: -A posttest is an assessment measure given to participants after they have received treatment as part of a research study. A pretest-posttest research design must provide participants with the same assessment measures before and after treatment in order to determine if any changes can be connected to the treatment.

Detailed explanation-2: -Treatment manipulation must be checked using pretests and pilot tests prior to the experimental study. Any measurements conducted before the treatment is administered are called pretest measures, while those conducted after the treatment are posttest measures .

Detailed explanation-3: -a research design in which the same assessment measures are given to participants both before and after they have received a treatment or been exposed to a condition, with such measures used to determine if there are any changes that could be attributed to the treatment or condition.

Detailed explanation-4: -noun. post·test ˈpōs(t)-ˌtest. : a test given to students after completion of an instructional program or segment and often used in conjunction with a pretest to measure their achievement and the effectiveness of the program.

Detailed explanation-5: -Pre-test and post-test design is a form of quasi-experimental research that allows for uncomplicated assessment of an intervention applied to a group of study participants.