Figure 1. Illustration of three-groups quasi-experimental design.

From

Differential Effects of Selected Psychotherapeutic Interventions on Procrastination Reduction and Improved Mathematics Achievement among Low Achieving Students

Ugwueze Stella, Agbakwuru Chikwe, Ekeh P. U

American Journal of Educational Research. 2018, 6(4), 354-360 doi:10.12691/education-6-4-9