“…Some evidence suggests that certain speech production or auditory outcomes may be better for children who are only exposed to spoken language (and not sign language). For example, studies have reported that speech production or auditory skills tend to be better for children who are exposed only to speech than for children who are exposed to both speech and sign language (e.g., Dettman et al, 2013;Percy-Smith et al, 2010); however, overall language and social/emotional skills may be better supported by bimodal bilingual language use (e.g., Swanwick & Tsverik, 2007). Another study found that the speech-only children performed better only on speech intelligibility, auditory reception, and grammatical closure than did those exposed to both speech and sign language (Jiménez et al, 2009).…”