Double trouble: Using spellings of different lengths to represent vowel length in English.

Much previous research on spelling and reading development has focused on single-syllable words. Here we examined disyllables, asking how learners of English mark the distinction between short and long first-syllable vowels by use of vowel digraphs and double-consonant digraphs. In a behavioral study, we asked participants in Grade 2 (n = 32, mean age ∼8 years), Grade 4 (n = 33, mean age ∼10 years), Grade 6 (n = 32, mean age ∼12 years), and university (n = 32; mean age ∼20 years) to spell nonwords with short and long first-syllable vowels.