Relative utility of selected methods for promoting the use of tree preservation in construction projects (mean scores, 5-point scale) by survey and group.
| Method | Survey | Group | Total n = 647 | |||||
|---|---|---|---|---|---|---|---|---|
| PA n = 275 | NADF n = 372 | F value | Arborist n = 268 | Builder n = 75 | Designer n = 204 | F value | ||
| Education | 4.66 | 4.72 | 1.42 | 4.75 a | 4.65 a | 4.66 a | 1.49 | 4.69 |
| Technical help | 4.37 | 4.47 | 2.40 | 4.57 a | 4.20 b | 4.38 b | 7.80 | 4.43 |
| Local ordinances | 3.71* | 4.16* | 20.87 | 4.08 a | 2.89 b | 4.16 a | 34.46 | 3.97 |
| Govt. incentives | 3.78 | 3.94 | 2.43 | 3.94 a | 3.67 a | 3.83 a | 1.50 | 3.87 |
| State laws | 3.36 | 3.49 | 1.35 | 3.57 a | 2.49 b | 3.55 a | 19.64 | 3.44 |
Between surveys, an asterisk indicates means are significantly different at p < .05; d.f. = 1, 645.
Among groups, means within a row followed by the same letter are not significantly different at p < .05; d.f, 2, 544.