Beyond Cronbach’s Alpha: How We Tested the PHQ-9 and DASS-21 Using CFA, IRT and Network Analysis
See how CFA, item response theory and network analysis revealed what reliability coefficients alone could not about the PHQ-9 and DASS-21.
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Tag: Item Response Theory
From PHQ-9 Scores to Symptom Networks: A Deeper Look at Student Mental Health
A 602-student Pakistani study shows how PHQ-9 scores, item response theory and symptom networks reveal detail hidden by total depression scores.
Can PHQ-9 and DASS-21 Tell Us More Than a Depression Score?
PHQ-9 and DASS-21 can reveal more than symptom totals, including item performance, symptom patterns, scale structure, and differences between groups.
Which Depression Symptoms Matter Most? What Item Response and Network Analysis Revealed
A Pakistani university study used item response and network analysis to reveal which PHQ-9 depression symptoms carried the most information.
Self-Worth and Concentration May Be Key Depression Symptoms in University Students
A Pakistani student study suggests self-worth and concentration symptoms may carry especially useful information when assessing depression.