Also called the one-group posttest-only design,the _________________ has only one group,a treatment,and a posttest.Because there is only one group,there is no random assignment.

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The one-shot case-study design, also known as the one-group posttest-only design, has only one group that receives treatment and is tested only once after the treatment. This design is considered weak because there is no comparison group and no pretest to establish a baseline for comparison. The lack of random assignment also limits its internal validity. Therefore, it is categorized as a quasi-experimental design.

Also Called the One-Group Posttest-Only Design,the _________________ Has Only One