Table 1. Durations used in each study providing a direct comparison of retrospective vs. prospective paradigms.
| Articles | Task duration |
| 120 s or less | |
| Avni-Babad & Ritov [25] | 120 s |
| Boltz [5] | 7 s to 10 s |
| Bueno MartÃnez [54] | 80 s |
| Brown [30] | 16 s or 32 s |
| Gruber & Block [26] | 15 s |
| Hicks, Miller & Kinsbourne [11] | 42 s |
| Klapproth [27] | 15 s to 45 s |
| Kurtz & Strube [28] | 30 s or 60 s |
| McClain [14] | 120 s |
| Miller, Hicks & Wilette [12] | 32 s to 54 s |
| Predebon [31] | 10 s to 50 s |
| Predebon [55] | 48 s |
| Predebon [29] | 12,5 s to 50 s |
| Zakay [37] | 3 s or 6 s |
| Zakay [15] | 12 s or 15 s |
| Zakay & Fallach [34] | 10 s |
| 121 s to 20 min | |
| Block [35] | 165 s (exp1) |
| 160 s (exp2) | |
| Block, George & Reed [56] | 270 s |
| Brown & Stubbs [44] | 14,45 min to 19,18 min (exp1) |
| 7,7 min to 19,6 min (exp2) | |
| Brown & Stubbs [6] | 466 s or 836 s |
| Kikkawa [33] | 20 min |
| 20 min or more | |
| Bakan [32] | 60 min |
| Tobin & Grondin [8] | 8 min and 24 min** |
**Each participant made three consecutive tasks of 8 min, 8 min and 24 min and estimated time (prospectively or retrospectively) only at the end of all three tasks.