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Summary of previous literature. In the Result column, O indicates the result of the study supporting Levelt 2nd proposition and X indicates the violation of Levelt 2nd proposition.
| Study | Stimulus | Size | Result |
|---|---|---|---|
| Levelt (1965) | reversed | 6.00° | O |
| Fox and Rasche (1969) | luminance | 3.24° | O |
| Bossink et al. (1993) | contrast | 1.32° | X |
| Meng and Tong (2004) | 6° × 2° | O | |
| Logothetis et al. (1996) | sine | 3° | O |
| Blake (1977) | wave | 1.25° | O |
| Mueller and Blake (1989) | grating | 0.80° | X |
| Brascamp et al. (2006) | 0.62° | X |
