“…Another relevant data is that only 6 studies (19)(20)(21)(22)(23)(24) did not perform comparisons between groups (Chart 1). In other words, these studies were carried out with children regularly enrolled in educational institutions (19)(20)(21)23,24) , or with children suspected of central auditory processing disorder (22) . The other studies compared 2 (26)(27)(28)(29)(30)(31)(32)34,(36)(37)(38)(39)(40)(41)(42)(43)45,49,51,(54)(55)(56)(57)(58)61) , 3 (25,33,44,(46)(47)(48)50,52,53,59,60) or 5 (62) study groups.…”