“…Several recent studies have identified morphological awareness (Tighe, 2012; Herman, Gilbert-Cote, Reilly, & Binder, 2013; Tighe & Binder, 2014; To, Tighe, & Binder, in press) and vocabulary knowledge (Tighe, 2012; Hall, Greenberg, Laures-Gore, & Pae, 2014; Mellard & Fall, 2012; Mellard, Fall, & Woods, 2010; Taylor, Greenberg, Laures-Gore, & Wise, 2012) as important component skills of reading comprehension in adults with low literacy skills. The extent to which morphological awareness and vocabulary knowledge contribute jointly and uniquely to reading comprehension has been investigated extensively with children (Kieffer & Lesaux, 2008; Ku & Anderson, 2003; Nagy, Berninger, & Abbott, 2006; Nagy, Berninger, Abbott, Vaughan, & Vermeulen, 2003; Singson, Mahony, & Mann, 2000); however, it has only been considered in a single study in the low literate adult population (Tighe, 2012).…”