The measurement of quality of life through the content analysis of verbal behavior.

The 'quality of life' is a construct which many researchers are attempting to measure by means of self-rating procedures and by ratings from external observers. Another method of measuring this construct includes features of both the self-report method and the external observer rating method, and by doing so it minimizes some of the measurement errors inherent in the separate methods; this third method involves the content analysis of verbal behavior. This latter method preserves the reliability and validity of the scales that have been developed and tested for content analysis, while preserving the meanings intended by the subjects who are being assessed on this dimension, which meanings are often obscured or lost through self-report and ratings scales. A group of Content Scales especially applicable to assess the quality of life are reviewed and examples of their applicability are given. A discussion is provided dealing with special problems involving the assessment of this dimension, including cross-cultural issues and other factors that need consideration with respect to generalizability of the findings.