Table 3.
Tests for experimental moderator variables
| Metric | Factor | n | Estimate | 95% CI lower bound | 95% CI upper bound | QM | df | P‐value |
|---|---|---|---|---|---|---|---|---|
| SMDmean | Log cage volume (cm3) | 186 | 0.049 | −0.018 | 0.116 | 2.084 | 1 | 0.149 |
| Duration of study (hours) | 209 | −0.0002 | −0.001 | 0.0002 | 0.892 | 1 | 0.345 | |
| Design | 3.188 | 1 | 0.074 | |||||
| Additive (reference) | 99 | 0.569 | 0.341 | 0.797 | ||||
| Substitutive | 115 | −0.277 | −0.581 | 0.027 | 0.074 | |||
| Study setting | 0.191 | 1 | 0.662 | |||||
| Field (reference) | 89 | 0.487 | 0.222 | 0.752 | ||||
| Lab/Greenhouse | 125 | −0.072 | −0.393 | 0.250 | 0.662 | |||
| SMDmax | Log cage volume (cm3) | 186 | 0.037 | −0.036 | 0.109 | 0.988 | 1 | 0.320 |
| Duration of study (hours) | 209 | −0.0002 | −0.001 | 0.0003 | 0.707 | 0.401 | ||
| Design | 9.351 | 1 | 0.002 | |||||
| Additive (reference) | 99 | 0.122 | −0.136 | 0.379 | ||||
| Substitutive | 115 | −0.519 | −0.852 | −0.186 | 0.002 | |||
| Study setting | 0.003 | 1 | 0.955 | |||||
| Field (reference) | 89 | −0.104 | −0.392 | 0.185 | ||||
| Lab/Greenhouse | 125 | −0.010 | −0.353 | 0.333 | 0.955 |
Parameter estimates are shown for continuous variables. Categorical variable estimate is the reference level then the difference between the other levels of the factor. QM statistic is the omnibus test for the factors and Wald z‐tests show differences between levels. SMDmean is predator polyculture compared to the mean of the component predator species in monocultures. SMDmax is the predator polyculture compared to the most effective predator species in a monoculture. Bold values indicates statistically significant.