FSIQ with absent (n = 16) and present (n = 6) cerebellar syndrome (CS) at time of neuropsychological evaluation. Representation of the results is given as a Tukey and Cleveland's box-plot. The box represents the 5 principal centiles, ie 50% of the distribution. The line in the middle of the box represents the median. The line on top of the box joins the 90th centile. The line below the box joins the 10th percentile. Circles indicate the extreme values.