Problems With Mental Health Testing
January 18, 2026
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A recent study demonstrated that a huge percentage of those who take the PHQ-9 a simple depression screening and monitoring tool - are completely misinterpreting the questions - yet many insurance companies demand such tests to demonstrate an individual's response to depression treatment. Furthermore, even when mental health tests are written well, they're often administered incorrectly, leading to uninterpretable results. Just because we can measure something doesn't mean that we've captured something meaningful.
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Here's a free link to my Medium article on Mental Health Testing:
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References:
Interpretation Issues With the Patient Health Questionnaire Instructions (2025)
Why are we still using the PHQ-9? A Historical Review and Psychometric Evaluation of Measurement Invariance (2025)
Accuracy of the Patient Health Questionnaire-9 for screening to detect major depression: updated systematic review and individual participant data meta-analysis (2021)
Comparison of the Usefulness of the PHQ-8 and PHQ-9 for Screening for Major Depressive Disorder: Analysis of Psychiatric Outpatient Data (2019)
Better than we think: Is the treatment of depressed patients more effective than we think?
(Zimmerman)
Does asking about suicide and related behaviours induce suicidal ideation? What is the evidence? (2014)
Full Chapter list:
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