Lexical stress is the contrast between strong and weak syllables within words. Ballard et al. (2012) examined the amount of stress contrastivity across adjacent syllables in word productions of typically developing three- to seven-year-olds and adults. Here, eight- to eleven-year-olds are compared with the adults from Ballard et al. using acoustic measurements of relative contrast in duration, peak intensity, and peak fundamental frequency of the vowels within the initial two syllables of each word. While eight- to eleven-year-olds are closer to adult-like stress contrastivity than three- to seven-year-olds, they are not yet adult-like in terms of the intensity contrast for words beginning with a weak syllable.