Study Selection bias Performance bias Detection bias Attrition bias Reporting bias Random sequence Allocation Blinding of participants and personnel Blinding of assessors Incomplete outcome data Selective reporting Cognitive Training Programs Bangirana et al., [36 ] + — — — + ? Bangirana et al., [35 ] + ? — — + ? Carlson-Green et al., [44 ] / / / — + ? Conklin et al., [46 ] + ? ? + — ? Conklin et al., [45 ] + ? ? + + ? Corti et al., [29 ] + — + + + ? de Kloet, et al., [34 ] / / / ? + ? Eve, et al., [64 ] / / / ? — ? Hardy et al., [65 ] / / / ? — ? Hardy et al., [47 ] + ? + + — ? Kesler et al., [21 ] / / / + + ? Phillips et al., [50 ] + + + + + ? Piovesana et al., [51 ] + + + ? — ? Sakzewski et al., [52 ] + + — + + ? Sohlberg et al., [66 ] / / / — — ? Treble-Barna et al., [33 ] / / / — + ? Vander Linden et al., [14 ] / / ? + + ? Verhelst et al., [68 ] / / / ? + ? Behavioral Training Programs Kurowski et al., [53 ] + + — + ? ? Kurowski et al., [69 ] + + — + ? ? Narad et al., [73 ] / / / ? + ? Tlustos et al., [54 ] ? ? — + ? ? Wade et al., [72 ] / / / ? + ? Wade et al., [55 ] + — — — — ? Wade et al., [22 ] + — — — + — Wade et al., [23 ] + — — — — ? Wade et al., [58 ] + — — — — — Wade et al., [56 ] + + — + ? ? Wade et al., [70 ] + + — + ? ? Wade et al., [71 ] + + — + ? ? Wade et al., [48 ] / / / ? ? ? Wade et al., [57 ] + ? — ? ? ?