Nonwords are phonological strings that conform to the phonotactic rules of a language but have no meaning. Many studies have shown that repeating nonwords is very difficult for children with Specific Language Impairment (SLI; e.g., Bishop, North, & Donlan, 1996; Conti-Ramsden & Hesketh, 2003; Dollaghan & Campbell, 1998; Edwards & Lahey, 1998; Gathercole & Baddely, 1990; inter alia). Despite the volume of work in this area, there remains considerable debate over what nonword repetition tests actually measure (for a recent review, see Coady & Evans, 2008). One of the earliest studies of nonword repetition proposed that children with SLI have a short-term phonological memory deficit, based on the finding that their repetition accuracy declines very significantly as nonword length increases (Gathercole & Baddeley, 1990). Subsequent work has revealed that lexical and phonological factors also play an important role in how accurately children, both typically developing and language-impaired, repeat nonwords (e.g., Coady & Aslin, 2004; Dollaghan, Biber, & Campbell, 1995; Edwards, Beckman, & Munson, 2004; Gallon, Harris, & van der Lely, 2007; inter alia), and indeed how deaf children who use a signed language repeat nonsense signs (Mann, Marshall, Mason, & Morgan, 2010). Researchers have recently become interested in how the phonological structure of nonwords affects their repetition, and whether phonological structure poses particular difficulties for children with SLI. Archibald and Gathercole (2007) found that children do not treat strings of syllables in nonwords in the same way as they treat strings of nonsense syllables in a serial recall task*they are more accurate at repeating syllables when they form a nonword, presumably because repetition is supported by coarticulatory and prosodic cues. Children with SLI, however, benefit less from this support than typically developing children. Further research has taken place at the level of metrical stress. Children with SLI are more likely to omit weak syllables when they occur in pre-stressed positions (i.e., fall outside a trochaic foot) than when they