Wilsher C, Atkins G, Manfield P
Psychopharmacology (Berl). 1979 Sep;65(1):107-9. doi: 10.1007/BF00491989.
Sixteen male dyslexic children were seen again when adults and matched with 14 student volunteers for a 21-day trial of piracetam. It was found, using a double-blind cross-over technique, that dyslexics significantly increased their verbal learning by 15.0% and students by 8.6% (over and above their placebo increase).