Ray Clifford

The Push Toward Communication.

Theodore V. Higgs, Ray Clifford · 1982 · 178 citations

Second Language Learning, Educational Linguistics, Multilingualism +37

The FSI/ILR/ACTFL Proficiency Scales and Testing Techniques

John L. Clark, Ray Clifford · Studies in Second Language Acquisition · 1988 · 96 citations

Engineering, Education, On-line Testing +20

Development and Evaluation of a Bluetooth EKG Monitoring Sensor

Joshua Proulx, Ray Clifford, Stephanie Dibb Sorensen et al. · 2006 · 49 citations

Empirical Validation of Reading Proficiency Guidelines

Ray Clifford, Troy L. Cox · Foreign Language Annals · 2013 · 28 citations

Empirical Validation, Education, Literacy Evaluation +20

Mirror, Mirror, on the Wall

Ray Clifford · CALICO Journal · 1999 · 22 citations