| 2009 | 2014 | 2018 | Between-group differences | |
---|---|---|---|---|---|
Test statistic | p | ||||
Education group | |||||
 Primary | 2.52 (0.42) | 2.53 (0.47) | 2.60 (0.37) | F = 2.751 | .065 |
 Secondary | 2.63 (0.50) | 2.65 (0.46) | 2.66 (0.32) | F = 0.958 | .384 |
 Tertiary | 2.73 (0.49) | 2.80 (0.45) | 2.65 (0.28) | F = 14.108** |  < .001 |
Q81 | |||||
 Yes | 2.66 (0.48) | 2.69 (0.47) | 2.66 (0.32) | F = 1.761 | .172 |
 No | 2.49 (0.51) | 2.52 (0.49) | 2.60 (0.33) | F = 3.150* | .044 |