Table 1

Results

FMD (n=18)Controls (n=18)p Value
Age (years)
 Mean±SD43.5±1248.2±140.33
Female/male12/610/80.73
Disease duration (years)
 Mean±SD5.4±4.5
Type of FMD, n (%)
 Tremor12 (67)
 Dystonia5 (28)
 Myoclonus1 (5)
Treatment, n (%)
 SSRIs4 (22)
 Benzodiazepines2 (11)
 None12 (67)
Raven's matrices score
 Mean±SD7.6±2.38.7±2.70.13
PDI-21 total score
 Mean±SD35.7±32.918.9±21.20.34
HADS score, mean±SD
 Anxiety subscale11.0±3.95.6±3.40.001
 Depression subscale9.2±4.23.0±1.8<0.001
 Total20.2±7.38.1±4.2<0.001
Draws to decision
 Mean±SD2.5±1.25.56±2.0<0.001
Effect of confirmatory evidence*
 Mean±SD0.5±15.45.5±2.20.32
Effect of disconfirmatory evidence
 Mean±SD4.8±33.2−2.6±5.40.02
Final decision (jar B chosen) in condition 2
 n (%)10 (56)3 (17)0.03
  • * Effect of confirmatory evidence: the estimate given after the second bead (red) was drawn minus the estimate given after first bead (red) was drawn; positive values indicate an increase in confidence.

  • Effect of disconfirmatory evidence: the estimate given after the third bead (red) was drawn minus the estimate given after fourth bead (blue) was drawn; positive values indicate a reduction in confidence.

  • FMD, functional movement disorder; HADS, Hospital Anxiety and Depression Scale; PDI-21, Peters et al Delusions Inventory of 21 questions; SSRIs, selective serotonin reuptake inhibitors.