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Self-perceived quality-of-life scale


The self-perceived quality-of-life scale is a psychological assessment instrument which is based on a comprehensive theory of the self-perceived quality of life (SPQL) and provides a multi-faceted measurement of health-related and non-health-related aspects of well-being. The scale has become an instrument of choice for monitoring quality of life in some clinical populations, for example, it was adopted by the Positively Sound network for women living with HIV.

The improvement of mental disorders may have an effect on multiple domains of an individual's life which could be captured only through a comprehensive measurement. For example, the treatment of a phobia may reduce fear (mental health index), which could lead to the improvement of social relations (social relations index) and, in turn, performance at work, resulting in an increase in salary (financial index). Hence, in order to detect all implications of a treatment (e.g., for a phobia), a comprehensive measurement across multiple domains of an individual's life is needed. The SPQL scale can provide such a comprehensive measurement.

The scale is designed in an electronic format. The software calculates scores automatically; this allows for advanced quantification methods. The automatic calculations and quantification methods allowed undertaking a comprehensive approach for assessing SPQL from multiple facets. A multi-facet approach, in turn, provided a comprehensive evaluation of the effectiveness of mental health interventions (through pre- and post tests).

The scale emerged from synthesis of existing theories including: (a) subjective well-being, (b) developmental life-stages, (c) different categories of human needs, (d) quality of life, and (e) subjective evaluation processes. The scale consists of three axes: Subjective well-being, positive and negative affect, and fulfillment of needs. See a model diagram below.

The scale can (a) identify possible side effects of psychiatric or psychological interventions which could occur in multiple domains of an individual’s life, (b) detect the occurrence of relapses, (c) assist in evaluating the progress of recovery, (d) measure the effects of various non-normative positive and negative events (e.g., divorce, promotion at work, becoming a parent) on an individual’s life as a whole and trace the course of their development, (e) evaluate an individual’s SPQL throughout the lifespan, (f) predict depression, anxiety, and mood, and (g) assess the effectiveness of interventions intended to enhance well-being and improve quality of life on an individual level.


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