Table 5.
Scores on test-style survey components in the 1st and 2nd rounds of administration, stratified by unpaired and paired comparisons.
| Survey Component 1 | 1st Round Mean ± SD (n) |
2nd Round Mean ± SD (n) |
Mean Difference | t-test p-value |
|---|---|---|---|---|
| All Participants, Unpaired | ||||
| c. Moss, air pollution, and urban forestry | 78.3 ± 17.0% (n = 20) |
85.3 ± 14.0% (n = 17) |
7.0% | 0.181 |
| d. Moss sampling methods | 65.7 ± 17.4% (n = 17) |
78.0 ± 17.0% (n = 15) |
12.3% | 0.053 |
| e. Moss sample preparation | 61.1 ± 25.5% (n = 15) |
77.1 ± 20.7% (n = 19) |
18.8% | 0.060 |
| Total 2 | 73.3 ± 14.1% (n = 9) |
82.6 ± 11.2% (n = 10) |
9.3% | 0.100 |
| Pre-Post Pairs | ||||
| c. Moss, air pollution, and urban forestry | 73.6 ± 17.5% (n = 13) |
87.4 ± 14.0% (n = 13) |
13.8% | 0.012 * |
| d. Moss sampling methods | 72.7 ± 8.1% (n = 10) |
79.0 ± 13.2% (n = 10) |
6.3% | 0.213 |
| e. Moss sample preparation | 61.1 ± 26.5% (n = 14) |
82.0 ± 18.9% (n = 14) |
20.9% | 0.002 * |
| Total 3 | 73.3 ± 14.1% (n = 9) |
82.6 ± 11.9% (n = 9) |
9.3% | 0.002 * |
1 These include the scored survey components lettered in Table 2. 2 This total refers to participants’ scores who completed all three survey components from the 1st or 2nd rounds of survey component administration (unpaired). 3 This total refers to participants’ scores who completed all three survey components from the 1st and 2nd rounds of survey component administration (paired). * p-values ≤ 0.05 are considered statistically significant.