Table 2.
Factors (F), covariates (C) and their interactions in univariate general linear models found to predict the latency for A. gundlachi to orient towards robot displays given at distances (A) typical of most receivers and (B) extreme for receivers
| A | Typical-receiver distance: overall model, F(10,147) = 3.82, P < 0.001 |
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|---|---|---|---|---|
| Independent variable | d.f. | F | P | |
| Intercept | 1 | 5.01 | 0.027 | |
| Display-type (F) | 2 | 0.52 | 0.596 | |
| Light (C) | 1 | 1.32 | 0.253 | |
| Visual noise (C) | 1 | 2.23 | 0.138 | |
| Robot ID (C) | 1 | 0.04 | 0.843 | |
| Display-type*light | 2 | 10.11 | <0.001 | |
| Display-type*light*robot ID | 3 | 7.40 | <0.001 | |
| B | Extreme-receiver distance: overall model, F(7,164) = 2.26, P = 0.032 |
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| Independent variable | d.f. | F | P | |
| Intercept | 1 | 39.77 | <0.001 | |
| Display-type (F) | 2 | 4.03 | 0.020 | |
| Light (C) | 1 | 5.62 | 0.019 | |
| Visual noise (C) | 1 | 1.60 | 0.207 | |
| Robot ID (C) | 1 | 0.54 | 0.464 | |
| Display-type*robot ID | 2 | 4.44 | 0.013 | |
All covariate interactions with display-type (F) were initially considered and only those significantly contributing to the final model were retained (P < 0.10).