Técnicas para el análisis de diseños de caso único en la práctica clínica: ejemplos de aplicación en el tratamiento de víctimas de atentados terroristas

This paper presents two techniques for the data analysis of single case designs in psychological treatment research: indices of data overlap between phases to estimate the size of treatment effect (or the magnitude of therapeutic change) and Jacobson and Truax's (1991) statistical approach to estimate the clinical significance of treatment effect. Based on a case of a victim of terrorism who suffered from posttraumatic stress disorder, major depressive disorder and panic disorder with agoraphobia and received trauma-focused cognitive-behavioral therapy, this paper illustrates the computation and application of percentage of non-overlapping data (PND), percentage of data points exceeding the median (PEM), non-overlap of all pairs (NAP), and statistical approach to clinical significance, and discusses their advantages and limitations as a complement of visual analysis of data.