“…Most studies found that multiSLI groups, when compared to monoTD groups, performed worse on measures of linguistic features (Crutchley et al., ; Engel de Abreu et al., ; Spoelman & Bol, ; Verhoeven, Steenge, van Weerdenburg, et al., ; Verhoeven, Steenge, & van Balkom, ). However, findings were mixed when they were compared to multiTD groups, with an equal number of studies reporting poorer performance on measures of linguistic features including use of correct verb forms or endings according to tense and number, and persistence of immature grammatical forms, and number of grammatical errors produced (Blom & Paradis, ; Rothweiler, Chilla, & Babur, ; Sanz‐Torrent, ) and conversely, no differences on these types of measures (Clahsen et al., ; Gutierrez‐Clellen, Simon‐Cereijido, & Erickson Leone, ; Verhoeven, Steenge, van Weerdenburg, et al., ; Verhoeven, Steenge, & van Balkom, ).…”