Table 1. Trial-types of the vibrotactile discrimination task.
| Context | Different/Same pairs | Easy | Medium | Hard | |||
| Fast-Slow | Different | Regular | Noisy | Regular | Noisy | Regular | NA |
| 24 | 24 | 24 | 24 | 24 | |||
| Same | NA | NA | NA | NA | NA | NA | |
| Same-Diff | Different | Regular | Noisy | Regular | NA | NA | NA |
| 24 | 24 | 24 | |||||
| Same | Regular | Noisy | Regular | NA | NA | NA | |
| 24 | 24 | 24 | |||||
The trial-types are determined by task difficulty (easy, medium, hard), noise (regular, noisy) and context (fast-slow, same-diff). There were 24 trials for each trial-type presented pseudorandomly across four sessions; two for the fast-slow context, and two for the same-diff context. Boxes with NA (not applicable) indicate possible trial-types that were not used in the study.