A comparison of taxonomic systems for classifying homeless men.

The present study compared the relative merits of two taxonomic systems for classifying homeless men. One system classified homeless men based on their past history of psychiatric disability. The other system classified individuals on the basis of their current psychiatric impairment. Both classification systems displayed significant discriminating power using a set of predictor variables that included demographic variables, childhood happiness, current life satisfaction, social support, stressful life events, and history of homelessness. Based on the percentage of correct classifications the system based on current impairment was superior to the system based on past history.