Response shift is defined as?

• A. A change in the meaning of one's self-evaluation of a target construct
• B. A change in external measurement tools
• C. A change in domains of QoL that matter
• D. A change in internal measurement standard

Answer: (A)

Response shift occurs when a person changes the meaning they attach to their own evaluation of a target construct, such as quality of life. In other words, after adapting to health changes or life events, the internal significance of what they’re measuring shifts, so their self-rated score reflects a new interpretation rather than a simple real change in the construct itself. The option that describes a change in the meaning of one’s self-evaluation captures this core idea. Changing external measurement tools is about methods, not the person’s internal judgment. Changes in domains that matter describe reprioritization, another aspect of response shift, while a change in internal measurement standards describes recalibration; these are related mechanisms but don’t define the overall concept as directly as reconceptualization.