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What is VALIDITY?
Transcript of What is VALIDITY?
Erica, Hana, Paul and Mary
"The degree to which an observed result, such as a difference between two measurements, can be relied upon and not attributed to random error in sampling or in measurement." (seotermglossary)
Consistent pattern representing population
Assess the validity of depression assessments, BDI and GHQ based on the prestablished validity of CIDI assessment.
Beck Depression Inventory
BDI-21, BDI-13, BDI-6
Generic Health Questionnaire
Composic International Diagnostic Interview
Positives of CIDI
valid and reliable
prevalence of depressive disorders: chronic and major depressive disorders
alcohol and anxiety disorder
Severity of depression
"pure depression" diagnosis scored higher than "pure anxiety" or "pure alcohol use"
AUC --> gender differences
No major difference in terms of accuracy among the BDI scales
All scales performed better among men than women
Example BDI-6 Topics
Negatives of CIDI
limits time frame
only valid in population context not case finding
GHQ vs. BDI
Good psychometric properties have been reported
GHQ-12 developed for measuring
anxiety and depression
Social dysfunction and loss of confidence
Originally developed as a measure of the intensity of depression
Addresses the severity of cognitive and somatic aspects of depression
1.Reliability vs. Validity
Which is more important?
2.Why did the results of the study find a difference between men and women in terms of consistency in survey data?
AUC (Area Under a ROC Curve)
values indicate overall accuracy of scales
Mood, Pessimism, Dissatisfaction, Guilt, Self-dislike, Indecisiveness
Discussion Questions Continued
3.Given that the CIDI does have limitations, can there be a golden standard for assessing psychiatric disorders (or general self-reporting assessments)?
4. Do you think length is a factor in high-quality results?