Answer:
These factores are: set point, life circumstances and intentional activity.
Which account for 50%, 10% and 40%, respectively, of the variability of happiness.
Explanation:
In the article called "Pursuing happiness: The architecture of sustainable change", Lyubomirsky et. al. (2005), propose a model for what they call chronic happiness. In this model they operationalize the concept of happiness in three measurable variables: set point, which are the genetic factors that influence a person's happiness, such as afective and personality traits. The authors found that this variable accounts for up to 50% of the entire construct.
The second variable is called life circumstances. These are the circumstantial factors that are relevant for a person's level of happines, they include demographic factors such as age, gender and ethnicity; and also life status, such as income and occupational status. The authors found that this variable accounts for only 10% of the construct.
The last variable is called intentional activity. It includes activities in which humans choose to engage in, in their everyday lives. For example, exercising, devoting time to helping others, etc. This variable accounts for 40% of the hapiness construct.
