Table 1. Number of mark actions (non-mark actions) [the sum of trials 1 and 2] during each condition with each mark.
| Subject | Barrier/Grey | Barrier/Red | Blurry /Grey | Blurry /Red | Mirror/Grey | Mirror/Red | Regular Mirror | Blurry Mirror | Non-Mirror Visual |
|---|---|---|---|---|---|---|---|---|---|
| Fido | 0 (12) | 0 (5) | 1 (3) | 20 (13) | 5 (14) | 64 (37) | ☑ | ☑ | |
| Bitsy | 0 (0) | 0 (2) | 0 (17) | 19 (2) | 0 (1) | 2 (3) | ☑ | ☑ | |
| Jan | 1 (32) | 4 (31) | 0 (23) | 19 (94) | 0 (4) | 3 (2) | ☑ | ||
| Reorx | 1 (0) | 0 (4) | 1 (7) | 4 (1) | 0 (7) | 0 (10) | ☑ | ||
| Lance | 1 (2) | 1 (0) | 0 (40) | 5 (4) | 2 (48) | 2 (2) | ☑ | ||
| Capone | 0 (31) | 5 (47) | 5 (87) | 9 (43) | 0 (70) | 1 (18) | ☑ | ||
| Krusty | 6 (21) | 16 (25) | 20 (17) | 27 (39) | 14 (82) | 18 (32) | ☑ | ||
| Sid | 24 (176) | 22 (184) | 6 (153) | 17 (115) | 0 (138) | 30 (189) | ☑ | ||
| Stefen | 1 (6) | 10 (4) | 0 (13) | 0 (5) | 1 (4) | 2 (2) | ☑ | ||
| Bert | 1 (21) | 28 (20) | 0 (13) | 7 (8) | 0 (22) | 8 (2) | ☑ |
Note: Bold values indicate mark action mirror scores that are higher than any control condition. To emphasize important differences, checkmarks in the Regular and Blurry Mirror columns indicate the bird made 1.5x more mark actions during the mirror condition than during any control condition (the value being selected as a conservative subjective point for comparison that could be scaled to each bird’s behaviour). Checkmarks in the Non-Mirror Visual column indicate mark actions were elevated during the Barrier/Red condition.