Level of agreement between self-reports and other-reports obtained from a large two-wave study of older adults was examined. Various measures of subjective well-being (affect, happiness, and life satisfaction) and behavioral manifestations (smoking and sleep quality) were assessed. Results indicate that the SWB measures were highly stable over a 9-month period, and that good agreement between the self- and other-reports was found for the SWB measures. In addition, SWB was related to behavioral manifestations and that these ratings were corroborated through the other-reports. This study furthers the support for the reliability of SWB over time and advances the criterion validity of SWB measures through use of collateral assessments.
Lepper, H. S. (1998). Use of other-reports to validate subjective well-being measures. Social Indicators Research, 44(3), 367-379.