Table 1

Mediator measures response and reliability

MeasureResponse ratesInternal consistency— Cronbach’s alpha (standardised)
BaselineInterim follow-upBaselineInterim
Completed all items (n)Completed half or more of items (n)Completed all items (n)Completed half or more of items (n)
Student view on school climate
Overall5733
85.99%
6635 99.52%5549 88.22%6265 99.60%0.91370.9170
Student sense of belonging subscale6293 94.39%6613 99.19%5965 94.83%6240 99.21%0.79520.8225
Student commitment to academic values subscale6519 97.78%6581 98.71%6190 98.41%6231 99.06%0.73940.7732
Student perception of supportive teacher relationships subscale6221 93.31%6631 99.46%5935 94.36%6247 99.32%0.88040.8938
Student perception of participative school environment subscale6396 95.94%6600 99.00%6071 96.52%6231 99.06%0.80050.8313
Student report of friends’ contact with police in the last year6494
97.41%
NA6167
98.04%
NANANA
Staff view on school organisational climate
Overall93
77.50%
99
82.50%
31
77.50%
31
77.50%
0.83570.6266
Authority distributed among staff subscale98
81.67%
99
82.50%
31
77.50%
31
77.50%
0.63400.5952
Staff relationships with students subscale98
81.67%
99
82.50%
31
77.50%
31
77.50%
0.73490.7633
Integration of students’ academic education and broader social development subscale98
81.67%
99
82.50%
31
77.50%
31
77.50%
0.69840.4839
School–community relationships subscale96
80.00%
99
82.50%
31
77.50%
31
77.50%
0.73630.7536