Table 4.
M-FAST Testing-the-Limits Changes to Item Scoring
| Item # |
Score Changed % (n) |
Participant No Longer Endorsed % (n) |
Consensus Determination % (n) |
Misheard or Misunderstood % (n) |
Responded to Part of Item % (n) |
Idiosyncratic Interpretation % (n) |
Plausible Symptom % (n) |
|---|---|---|---|---|---|---|---|
| 1 | 10.2 (18) | 27.8 (5) | 72.2 (13) | 11.1 (2) | 11.1 (2) | 11.1 (2) | 83.3 (15) |
| 2 | 45.5 (80) | 3.8 (3) | 96.3 (77) | 1.3 (1) | 3.8 (3) | 3.8 (3) | 92.5 (74) |
| 3 | 10.8 (19) | 57.9 (11) | 42.1 (8) | 31.6 (6) | 26.3 (5) | 36.8 (7) | 42.1 (8) |
| 4 | 2.3 (4) | 100 (4) | 0.0 | 25 (1) | 50 (2) | 50 (2) | 0.0 |
| 5 | 16.5 (29) | 62.1 (18) | 37.9 (11) | 48.3 (14) | 25 (7) | 50 (14) | 3.6 (1) |
| 6 | 0.6 (1) | 100 (1) | 0.0 | 0.0 | 100 (1) | 0.0 | 0.0 |
| 7 | 5.1 (9) | 55.6 (5) | 44.4 (4) | 44.4 (4) | 44.4 (4) | 22.2 (2) | 55.6 (5) |
| 8 | 2.8 (5) | 100 (5) | 0.0 | 40 (2) | 60 (3) | 20 (1) | 0.0 |
| 9 | 3.4 (6) | 33.3 (2) | 66.7 (4) | 16.7 (1) | 0.0 | 66.7 (4) | 16.7 (1) |
| 10 | 2.3 (4) | 100 (4) | 0.0 | 25 (1) | 50 (2) | 75 (3) | 0.0 |
| 11 | 3.4 (6) | 83.3 (5) | 16.7 (1) | 16.7 (1) | 83.3 (5) | 16.7 (1) | 16.7 (1) |
| 12 | 5.7 (10) | 80 (8) | 20 (2) | 20 (2) | 70 (7) | 20 (2) | 10 (1) |
| 13 | 0.6 (1) | 100 (1) | 0.0 | 0.0 | 100 (1) | 100 (1) | 0.0 |
| 14 | 7.4 (13) | 61.5 (8) | 38.5 (5) | 15.4 (2) | 23.1 (3) | 53.8 (7) | 23.1 (3) |
| 15 | 1.1 (2) | 100 (2) | 0.0 | 50 (1) | 50 (1) | 50 (1) | 0.0 |
| 16 | 5.1 (9) | 66.7 (6) | 33.3 (3) | 44.4 (4) | 44.4 (4) | 33.3 (3) | 22.2 (2) |
| 17 | 8.0 (14) | 14.3 (2) | 85.7 (12) | 14.3 (2) | 14.3 (2) | 7.1 (1) | 78.6 (11) |
| 18 | 5.1 (9) | 33.3 (3) | 66.7 (6) | 22.2 (2) | 11.1 (1) | 44.4 (4) | 55.6 (5) |
| 19 | 4.0 (7) | 57.1 (4) | 42.9 (3) | 0.0 | 0.0 | 100 (7) | 14.3 (1) |
| 20 | 9.7 (17) | 23.5 (4) | 76.5 (13) | 0.0 | 23.5 (4) | 5.9 (1) | 70.6 (12) |
| 21 | 8.0 (14) | 78.6 (11) | 21.4 (3) | 21.4 (3) | 7.1 (1) | 78.6 (11) | 7.1 (1) |
| 22 | 11.9 (21) | 38.1 (8) | 61.9 (13) | 38.1 (8) | 14.3 (3) | 42.9 (9) | 33.3 (7) |
| 23 | 37.5 (66) | 12.1 (8) | 87.9 (58) | 0.0 | 9 (6) | 16.4 (11) | 86.6 (58) |
| 24 | 1.1 (2) | 50 (1) | 50 (1) | 0.0 | 0.0 | 100 (2) | 0.0 |
| 25 | 2.8 (5) | 60 (3) | 40 (2) | 40 (2) | 20 (1) | 0.0 | 60 (3) |
| Mean | 8.4% | 60% | 52.7% | 27.7% | 34.2% | 43.7% | 40.7% |
Note. N = 176. The denominator for the first column is 176 (total number of subjects who completed testing the limits). The denominator for all other columns is the number of times a score was changed for that item (i.e., column #1). Whether the participant no longer endorsed the item upon follow-up questioning or whether it was still endorsed but the consensus was that the symptom did not represent malingering was a mutually exclusive determination. However, detailed explanations (last 4 columns) of why the symptom score was changed were not mutually exclusive and therefor sum to more than 100% for a given item.