Correlational findings

Study Sakawa et al. (2015): study JP Kinki 2006

Students, Osaka, Japan, followed 14 months, 2006-2008
N = 70
Non Response:
Questionnaire: web
Respondents were asked to fill out a daily survey and and an hourly survey: - Daily survey: During a month respondents were asked to report every day their happiness and evaluation of personal and macro news (how good or bad they are) Arriving on that day. - Hourly survey: Respondents were asked to choose one day every month on which to report their happiness and what they were doing just before reporting, once during every hour that day.


Authors's label
Hour of the day
Our Classification
Every hour of the day (from 1:00 to 24:00) respondents were asked how happy they felt right now, .

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks A-ARE-m-sqr-n-11-b OLRC = +/- Average happiness falls during the night, reaching lowest value at 7:00 pm. It then rises up to 10:00 pm. After staying at a constant level until 16:00, it goes up until 23:00.