FMR1 and fragile X syndrome: Further, future research should examine how FMRP interacts with other constellations of variables in the manifestation of other aspects of speech and language (e.g., syntax development, phonological processes), cognitive abilities (e.g., executive functions, working memory), and related functional outcomes (e.g., adaptive behavior) in young boys with FXS, thus continuing to support potential intervention efforts for young boys with FXS [37,38].