Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...
The General Health Questionnaire (GHQ) is a widely used self‐report instrument designed to screen for common psychiatric disorders and measure psychological distress. Initially developed to detect non ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback