Developmental language disorder (DLD; prior called specific language impairment, (Bishop et al., 2017) is one of the most frequent childhood disorders. Efficient intervention requires that we understand the underlying nature of the disorder. In this paper we will present our ongoing study of children with DLD that has been made possible by the Marcus and Amalia Wallenberg Foundation. Our hypothesis is that the underlying deficit in DLD is not domain specific, (i.e., affects language only) but rather domain general and as such relates to general cognitive mechanisms. If results from our study confirms our hypotheses this could affect how interventions for children with DLD should be developed and designed.