effect size

New paper: procedural sensitivities of effect size measures for SCDs

I’m very happy to share that my article “Procedural sensitivities of effect sizes for single-case designs with directly observed behavioral outcome measures” has been accepted at Psychological Methods. There’s no need to delay in reading it, since you can check out the pre-print and supporting materials.

Introduction to the special issue on single-case systematic reviews and meta-analysis

This special issue provides an update on recent conceptual and methodological developments for conducting systematic reviews and meta-analyses of single-case research. In this introductory article, we (a) describe the important role of systematic …

New working paper: Using log response ratios for meta-analyzing SCDs with behavioral outcomes

One of the papers that came out of my dissertation work (Pustejovsky, 2015) introduced an effect size metric called the log response ratio (or LRR) for use in meta-analysis of single-case research—particularly for single-case studies that measure behavioral outcomes through systematic direct observation.

Functional assessment-based interventions for students with or at-risk for high incidence disabilities: Field-testing single-case synthesis methods

This systematic review investigated one systematic approach to designing, implementing, and evaluating functional assessment–based interventions (FABI) for use in supporting school-age students with or at-risk for high-incidence disabilities. We …

Research synthesis and meta-analysis of single-case designs

Between-case standardized mean difference effect sizes for single-case designs: A primer and tutorial using the scdhlm web application

We describe a standardised mean difference statistic (d) for single-case designs that is equivalent to the usual d in between-groups experiments. We show how it can be used to summarise treatment effects over cases within a study, to do power …

New tutorial paper on BC-SMD effect sizes

I’m pleased to announce that the Campbell Collaboration has just published a new discussion paper that I wrote with my colleagues Jeff Valentine and Emily Tanner-Smith about between-case standardized mean difference effect sizes for single-case designs.

Presentation at IES 2016 PI meeting

I am just back from the Institute of Education Sciences 2016 Principal Investigators meeting. Rob Horner had organized a session titled “Single-case methods: Current status and needed directions” as a tribute to our colleague Will Shadish, who passed away this past year.

What is Tau-U?

Parker, Vannest, Davis, and Sauber (2011) proposed the Tau-U index—actually several indices, rather—as effect size measures for single-case designs. The original paper describes several different indices that involve corrections for trend during the baseline phase, treatment phase, both phases, or neither phase.

New working paper: Procedural sensitivities of SCD effect sizes

I’ve just posted a new version of my working paper, Procedural sensitivities of effect sizes for single-case designs with behavioral outcome measures. The abstract is below. This version is a major update of an earlier paper that focused only on the non-overlap measures.