Single subject designs: Current methodologies and future directions

Abstract

Knowledge of the best uses, limitations, and quality criteria for single subject design (SSD) research has grown over the decades. High-quality SSDs provide replicable results and advance knowledge. Using modern technology, meta-analysis and systematic review methods can be applied to synthesize results of SSDs to provide best evidence on numerous important interventions (e.g., those involving assistive technology). Larger numbers of SSDs are needed.