Compute Morris’s dppc2 for pretest-posttest-control designs: the correct effect size for educational interventions, with 95% CI and an APA 7 sentence.
If you use it in your thesis or in a paper, cite it so that readers of your Methods section know how the calculation was done.
Ciudad-Fernández, V. (2026). Pre-post control group effect size calculator [Web application]. Ciudad Science. Retrieved October 14, 2026, from https://analisisdedatospsicologia.com/en/tools/pre-post-effect-size
For your Methods section: The effect size of the pretest-posttest-control group design was computed with Morris' (2008) d, using the Ciudad Science pre-post control group effect size calculator (Ciudad-Fernández, 2026).
@misc{ciudadfernandez2026prepost,
author = {Ciudad-Fern{\'a}ndez, V{\'i}ctor},
title = {{Pre-post control group effect size calculator}},
year = {2026},
publisher = {Ciudad Science},
howpublished = {Web application},
url = {https://analisisdedatospsicologia.com/en/tools/pre-post-effect-size},
urldate = {2026-10-14},
note = {Accessed 2026-10-14},
}