Specific questionnaire assessing the magnitude of recalibration for a specific intervention -- Questionnaires assessing how HRQoL is conceptualized by individuals -- Vignette ratings -- Use of the quality of life appraisal profile -- Qualitative Interviews -- Statistical methods -- Using structural equation modeling: The Schmitt technique -- Using structural equation modeling: The OP -- Using longitudinal regression modeling and latent trajectory analysis -- Relative importance analysis using discriminant analysis and/or logistic regression -- Using machine learning technique such as recursive partitioning tree analysis -- Using item response theory models -- A brief overview of some results from studies investigating the occurrence of RS effect -- Conclusion -- References -- Chapter 16: Interpretation of perceived health data in specific disorders -- Assessment of the health status measure as a state -- Comparison with other populations -- Between-group comparisons -- Assessment by using various health state definitions -- Factors associated with perceived health -- Assessment of health data as a change -- Methods to interpret a perceived health change at an individual level: Definition of "responder"--Definition of responder based on change: MID -- Perspectives of the MID: Individual versus group -- Methods to define an MID -- Anchors used to define an MID -- Improvement versus deterioration in determining an MID -- Impact of baseline impairment in MID determination -- Impact of sampling -- Impact of response shift -- Recommendations -- Definition of responder based on final state -- Impact of various definitions of responders -- Methods to interpret a perceived health change at a group level -- Elements to interpret a change of a score -- Response shift -- Combination of health dimensions -- Longitudinal patterns of change in symptomatic joints