Table 3.
Sizes of the test stimulus and critical spacings. The test gratings were surrounded by same-frequency or high-frequency gratings having random orientation from trial to trial.
| Observer | Size of the test grating |
Critical spacing | |||
|---|---|---|---|---|---|
| Same frequency distractors |
High frequency distractors |
||||
| arcmin | periods | arcmin | periods | ||
| AN | 2.6 | 5.2 | 3.0 | 2.6 | 1.5 |
| OV | 2.1 | 4.9 | 3.5 | 2.8 | 2.0 |
| NN | 3.15 | 7.35 | 3.5 | 2.1 | 1.0 |
| MD | 3.1 | 4.2 | 2.0 | 3.1 | 1.5 |
| VB | 2.3 | 3.8 | 2.5 | 2.3 | 1.5 |
| PF | 4.5 | 9.0 | 3.0 | 7.5 | 2.5 |
| IK | 3.4 | 3.4 | 1.5 | 2.3 | 1.0 |
| Mean | 3.0 | 5.3 | 2.6 | 3.2 | 1.6 |