Key happiness factors don't include health

Rather, Deakin University psychology professor Robert Cummins, who will soon publish the results of his 29th happiness survey, said humans adapt to adverse health events better than they expect.

And certainly if they have the three key happiness factors: a good relationship, an income of $100,000 and activity that involves purpose and social interaction.

“For the most part, people adapt to disability, unless it’s catastrophically induced,” Professor Cummins told