| Public | Population Number of respondents
| Author(s) |
| Students | Psychology students, followed 2 weeks, University of Otago New Zealand, 1976 N = 48 | Lichter, S.; Haye, K.; Kammann, R. |
| Students | Students, New Zealand, 1985 N = 324 | Michalos, A.C. |
| Students | Students, New Zealand, 1985 N = 324 | Michalos, A.C. |
| Students | Students,University of Otago, New Zealand, 198? N = 55 | Kammann, R.; Flett, R. |
| Students | University students, New Zealand,1991 N = 314 | Diener, E.; Diener, M. |
| Trainees | Adults, trainees and controls, followed 10 weeks, Dunedin, New Zealand, 1978 N = 23 | Lichter, S.; Haye, K.; Kammann, R. |