1. Validity and the multitrait-multimethod matrix;Althauser,1970
2. Standards for educational and psychological tests;National Council on Measurements Used in Education,1985
3. Validity: An evolving concept;Angoff,1988
4. Longitudinal stability of personality characteristics;Backteman;Journal of Personality,1981
5. An inventory for measuring depression;Beck;Archives of General Psychiatry,1961