“…called the LENA digital language processor (DLP) and software for analysis of the collected audio data (Ford et al, 2008). The LENA DLP is inserted into a small pocket of clothing worn by the focal child and records all vocalizations that occur within a 1.82- to 3-m radius for up to 16 h. Initially developed for use with typically developing children between 12 and 48 months of age in their home environments (Christakis et al, 2009; Gilkerson and Richards, 2008; Zimmerman et al, 2009), LENA usage has expanded to investigations of children with ASD in home environments (Warren et al, 2010) and preschools (Dykstra et al, 2012; Sanders et al, 2016; or see Burgess et al, 2013 for both home and preschool), as well as language of adults serving children with ASD in a preschool setting (Irvin et al, 2013). In recent years, there have also been studies that used the LENA on school-aged children (e.g.…”