Participants
Three hundred and twenty-one Japanese adults took part in the survey. They were 160 males and 161 females with a mean age of 47.41 (SD= 19.17). They were registered members of a survey company Macromill (https://group.macromill.com/), who recruited and reimbursed them. The participants’ age ranged from 18 to 79, whom the company randomly chose.