infants can make an even more finegrained distinction between two types of word forms that are phonotactically legal—those that consist of high-frequency phonemes and phoneme combinations versus those that consist of low-frequency phonemes and pho- neme combinations. Some experiments have demonstrated increasing sensitivity to native lan- guage phonotactics from 6 to 9 months of age, indicating that phonotactic knowledge develops over time and with increased linguistic experience.