Table 3.
AICc results and comparison between models for different evolutionary hypotheses including Brownian motion (BM), a single regime OU model (OU1), a chimpanzee-sized ancestor of all hominoids (Anc_Pan), and the best-supported model (Surface fit) for different subsets of body mass data
| Data Set | Model | Surface AICc | Change AICc | t 1/2 |
|---|---|---|---|---|
| Complete data set (N = 87) | BM | 1998.35 | 326.97 | |
| OU1 | 1968.73 | 297.36 | ||
| Anc_Pan | 1714.99 | 43.62 | ||
| Surface fit | 1671.37 | 0.00 | 0.88 | |
| Well sampled reliably attributed early hominins data set (N = 63) | BM | 1418.45 | 225.58 | |
| OU1 | 1414.29 | 221.42 | ||
| Anc_Pan | 1315.41 | 122.54 | ||
| Surface fit | 1192.87 | 0.00 | 1.62 | |
| Extant primates only data set (N = 57) | BM | 1265.85 | 193.73 | |
| OU1 | 1268.03 | 195.91 | ||
| Anc_Pan | 1080.731 | 8.61 | ||
| Surface fit | 1072.12 | 0.00 | 0.21 |
Also shown is half-life (t 1/2) for each data set for the best-supported model