DRAFT: This module has unpublished changes.

Randall R. Robey's Levels of Evidence 


Randall R. Robey is an associate professor and director of the Communication Disorders program in the Curry School of Education at the University of Virginia. His research combines two areas of concentration: clinical aphasiology and quanitifying valid indices of change brough about by clinical interventions.

Randall R. Robey, is an associate professor and director of the Communication Disorders Program in the Curry School of Education at the University of Virginia. His research combines two areas of concentration: clinical aphasiology and quantifying valid indices of change brought about by clinical interventions - See more at: http://www.asha.org/Publications/leader/2004/040413/f040413a2/#1

Sources of Evidence                                                                         Classifcation


Meta-analysis of multiple well-designed controlled studes                       1A

Well-designed randomized controlled trials                                            1

Well-designed non-randomized controlled trial (quasi-experiments)            2

 

Observational studies with controls (restrospective studies,                     3
interruped time-series studies, case-control studies, cohort studies
with controls)

 

Observational Studies without controls (cohort studies without controls      4
and case series)

 

DRAFT: This module has unpublished changes.