Ryan J. Kettler

Cross-informant agreement for ratings for social skill and problem behavior ratings: An investigation of the Social Skills Improvement System—Rating Scales.

Frank M. Gresham, Stephen N. Elliott, Clayton R. Cook et al. · Psychological Assessment · 2010 · 252 citations

Social Psychology, Education, Psychometrics +17

Base rates of social skills acquisition/performance deficits, strengths, and problem behaviors: An analysis of the Social Skills Improvement System—Rating Scales.

Frank M. Gresham, Stephen N. Elliott, Ryan J. Kettler · Psychological Assessment · 2010 · 148 citations

Social Psychology, Educational Psychology, Social Skills Acquisition +24

Assessing Opportunity-to-Learn for Students With Disabilities in General and Special Education Classes

Alexander Kurz, Stephen N. Elliott, Christopher J. Lemons et al. · Assessment for Effective Intervention · 2014 · 63 citations

Disability, Education, Adapted Curriculum +21

Testing Accommodations: Theory and research to inform practice

Ryan J. Kettler · International Journal of Disability Development and Education · 2012 · 61 citations

Nursing, Student Profiles, Test Development +13

Modifying Achievement Test Items: A Theory-Guided and Data-Based Approach for Better Measurement of What Students With Disabilities Know

Ryan J. Kettler, Stephen N. Elliott, Peter A. Beddow · Peabody Journal of Education · 2009 · 53 citations

Disability, Educational Psychology, Education +23