sentence: The subjects participated voluntarily and received a small monetary recompensation for their participation.Control subjects ( n = 14 ) and synesthesia subjects ( n = 14 ) were matched for age ( synesthetes : 36 ± 15 years , range 19 – 57 , controls : 36 ± 14 years , range 22 – 61 ) , gender ( nine women per group ) , and general intelligence ( IQ values for synesthetes : 119 ± 13 and controls : 112 ± 17 ) as assessed by the MWT-B – “ Mehrfach – Wortschatz Test ” ( Lehrl et al ., 1995 ) .