• Happiness is subjective, therefore is hard to find a shared metric.
• Questionnaires that ask to answer specific questions and rate the happiness level is typically used in research.
• One of the most used questionnaire is Subective Happiness Scale.

Related Questions:

Related Topics:

References

• Lyubomirsky, S., & Lepper, H. (1999). A measure of subjective happiness: Preliminary reliability and construct validation. Social Indicators Research, 46, 137-155. The original publication is available at www.springerlink.com.