TY - JOUR
T1 - Current concepts in validity and reliability for psychometric instruments
T2 - Theory and application
AU - Cook, David A.
AU - Beckman, Thomas J.
PY - 2006/2
Y1 - 2006/2
N2 - Validity and reliability relate to the interpretation of scores from psychometric instruments (eg, symptom scales, questionnaires, education tests, and observer ratings) used in clinical practice, research, education, and administration. Emerging paradigms replace prior distinctions of face, content, and criterion validity with the unitary concept "construct validity," the degree to which a score can be interpreted as representing the intended underlying construct. Evidence to support the validity argument is collected from 5 sources: • Content: do instrument items completely represent the construct? • Response process: the relationship between the intended construct and the thought processes of subjects or observers • Internal structure: acceptable reliability and factor structure • Relations to other variables: correlation with scores from another instrument assessing the same construct • Consequences: do scores really make a difference? Evidence should be sought from a variety of sources to support a given interpretation. Reliable scores are necessary, but not sufficient, for valid interpretation. Increased attention to the systematic collection of validity evidence for scores from psychometric instruments will improve assessments in research, patient care, and education.
AB - Validity and reliability relate to the interpretation of scores from psychometric instruments (eg, symptom scales, questionnaires, education tests, and observer ratings) used in clinical practice, research, education, and administration. Emerging paradigms replace prior distinctions of face, content, and criterion validity with the unitary concept "construct validity," the degree to which a score can be interpreted as representing the intended underlying construct. Evidence to support the validity argument is collected from 5 sources: • Content: do instrument items completely represent the construct? • Response process: the relationship between the intended construct and the thought processes of subjects or observers • Internal structure: acceptable reliability and factor structure • Relations to other variables: correlation with scores from another instrument assessing the same construct • Consequences: do scores really make a difference? Evidence should be sought from a variety of sources to support a given interpretation. Reliable scores are necessary, but not sufficient, for valid interpretation. Increased attention to the systematic collection of validity evidence for scores from psychometric instruments will improve assessments in research, patient care, and education.
KW - Construct validity
KW - Educational measurement
KW - Medical education
KW - Quality of life
KW - Questionnaire
KW - Reproducibility of results
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U2 - 10.1016/j.amjmed.2005.10.036
DO - 10.1016/j.amjmed.2005.10.036
M3 - Review article
C2 - 16443422
AN - SCOPUS:31444434169
SN - 0002-9343
VL - 119
SP - 166.e7-166.e16
JO - American Journal of Medicine
JF - American Journal of Medicine
IS - 2
ER -