Ryans, David G. "A Comparison of Cross-Validity Data Yielded by Scoring Keys Obtained by Different Response Selection Techniques ." (Dittoed. Los Angeles: Teacher Characteristics Study.)
2.
Ryans, David G. "Concurrent Cross-Validation and Hold-Out Sample Validation Data for Scoring Keys of the Teacher Characteristics Schedule." (Dittoed. Los Angeles: Teacher Characteristics Study.)
3.
Ryans, David G. "Direct Observation of Performance as a Method of Obtaining Criterion Data Relative to Certain Teacher Characteristics ." (Dittoed. Los Angeles : Teacher Characteristics Study.)
4.
Ryans, David G. "Notes on the Criterion Problem in Research Design, with Special Reference to the Study of Teacher Characteristics." Journal of Genetic Psychology , LXXXXI (1957), 33-61.
5.
Ryans, David G. "Research Designs for the Empirical Validation of Tests and Inventories." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XVII (1957), 175-184.
6.
Ryans, David G. "The Investigation of Teacher Characteristics." The Educational Record, XXXIV (1953), 370-396.
7.
Wandt, Edwin. "A Comparison of the Attitudes of Contrasting Groups of Teachers." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, XIV ( 1954), 418-422.
