Solomon Four-Group Design

The Solomon Four-Group Design is a research method used to test the effect of a new intervention or treatment while controlling for potential biases. It involves four groups: two receive the treatment, and two do not. Among each pair, one group is tested before the treatment (pre-test) and the other after (post-test). This setup helps researchers determine if changes are due to the treatment itself or other factors like testing effects. It provides a thorough way to assess both the impact of the treatment and the influence of taking a pre-test.