Table 2.
Mean, minimum, and maximum ratings per task variant in each domain and overall difficulty.
| Training task | Memory | Executive functions | Attention | Language | Difficulty |
| Word search, mean (range) | 5.52 (5.05-6.20) | 6.04 (5.60-6.55) | 6.93 (6.50-7.60) | 5.65 (5.25-6.00) | 6.37 (5.70-7.00) |
| Problem resolution, mean (range) | 6.10 (6.10-6.10) | 7.23 (7.15-7.30) | 6.97 (6.90-7.05) | 5.20 (4.65-5.75) | 6.19 (5.35-7.20) |
| Numeric sequences, mean (range) | 5.30 (5.00-5.60) | 6.65 (6.50-6.80) | 6.87 (6.65-7.10) | 4.68 (4.45-4.90) | 3.06 (1.38-4.50) |
| Action sequencing | 4.72 (3.35-5.65) | 4.79 (3.90-5.65) | 5.35 (3.80-6.40) | 4.83 (3.50-5.75) | 4.74 (3.15-6.20) |
| Association | 3.37 (2.65-4.25) | 3.92 (3.40-4.35) | 3.95 (3.00-4.95) | 3.28 (3.00-3.85) | 3.78 (3.10-4.90) |
| Cancellation | 3.59 (2.60-4.50) | 3.98 (2.95-5.00) | 5.09 (4.05-6.15) | 2.94 (2.25-3.60) | 4.08 (2.85-5.05) |
| Categorization | 3.60 (2.20-5.00) | 4.43 (2.85-5.95) | 4.18 (2.60-5.65) | 3.87 (2.80-4.70) | 4.22 (2.35-6.05) |
| Comprehension of contexts | 2.63 (2.60-2.65) | 3.25 (2.65-3.85) | 3.40 (3.20-3.60) | 3.95 (3.45-4.45) | 2.93 (2.55-3.30) |
| Image Pairs | 6.97 (5.85-8.40) | 5.55 (4.75-6.40) | 6.75 (5.75-8.10) | 4.62 (3.90-5.45) | 6.35 (4.90-7.95) |
| Mazes | 3.87 (2.90-4.90) | 5.17 (3.70-6.45) | 5.23 (4.10-6.50) | 3.28 (2.65-3.70) | 4.63 (3.20-6.10) |
| Memory of stories | 6.36 (4.40-7.70) | 4.89 (3.25-6.15) | 6.67 (4.90-7.90) | 5.41 (4.15-6.65) | 5.95 (3.85-7.40) |