THE RELIABILITY AND VALIDITY OF THE CHINESE POLARITY INVENTORY

For the simultaneous measurement of manic and depressive symptoms, the Chinese Polarity Inventory (CPI), a 20-item self-report scale, was de veloped. A total of 329 depressive and 356 manic/hypomanic patients we re recruited in this scale developmental study in China, All patients completed the CPI and either the Chinese version of the Hamilton Depre ssion Rating Scale (for depressed subjects) or the Chinese version of the Bech-Rafaelsen Mania Scale (for manic subjects). The CPI was found to have excellent reliability and satisfactory concurrent validity. C onstruct validity analysis was performed using principal component ana lysis, which yielded 4 clinically meaningful factors: activity, pleasu rability, capability and irritability. The CPI was sensitive in differ entiating different severities of depression and mania. However, its a bility to differentiate mixed phase from other mood states and its sen sitivity to changes during the treatment still need to be studied furt her.