What question did this study set out to answer?

The aim is to evaluate how missing data is reported and handled in special education intervention research.

February 11, 2026

Missing Data Reporting and Handling in Special Education Group Intervention Research

Puntos clave

The aim is to evaluate how missing data is reported and handled in special education intervention research.
Conducted a systematic review of intervention studies from 2020.
Identified 121 studies focusing on group design interventions.
Analyzed the approaches to missing data reporting and handling used in these studies.
72 out of 121 studies reported missing data, which is 60% of the total.
Most studies used complete case analysis or pairwise deletion for handling missingness.
Few studies investigated the underlying mechanisms of missing data.

Resumen

We conducted a systematic review of missing data handling and reporting in a 1-year cross-section (2020) of group design special education intervention research. We identified 121 intervention studies. Of these 72 (60%) reported missing data at the case, variable, or item level. Few studies examined the mechanism underlying their missing data and most handled the missingness with either complete case analysis (listwise) or pairwise deletion. We discuss the implications of these findings and offer recommendations for improved reporting and handling methods.

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