Using electronic storybooks to support word learning in children with severe language impairments.

Novel word learning is reported to be problematic for children with severe language impairments (SLI). In this study, we tested electronic storybooks as a tool to support vocabulary acquisition in SLI children. In Experiment 1, 29 kindergarten SLI children heard four e-books each four times: (a) two stories were presented as video books with motion pictures, music, and sounds, and (b) two stories included only static illustrations without music or sounds. Two other stories served as the control condition. Both static and video books were effective in increasing knowledge of unknown words, but static books were most effective. Experiment 2 was designed to examine which elements in video books interfere with word learning: video images or music or sounds. A total of 23 kindergarten SLI children heard 8 storybooks each four times: (a) two static stories without music or sounds, (b) two static stories with music or sounds, (c) two video stories without music or sounds, and (d) two video books with music or sounds. Video images and static illustrations were equally effective, but the presence of music or sounds moderated word learning. In children with severe SLI, background music interfered with learning. Problems with speech perception in noisy conditions may be an underlying factor of SLI and should be considered in selecting teaching aids and learning environments.

Interactive electronic storybooks for kindergartners to promote vocabulary growth.

The goals of this study were to examine (a) whether extratextual vocabulary instructions embedded in electronic storybooks facilitated word learning over reading alone and (b) whether instructional formats that required children to invest more effort were more effective than formats that required less effort. A computer-based "assistant" was added to electronic storybooks. The assistant posed extratextual vocabulary questions. Questions were presented in a multiple-choice format so that children could respond by clicking on the picture that best represented the target word. In Experiment 1 (N=20), children read stories with and without questions. Children learned more words when reading with questions than without. Expressive vocabulary was particularly affected by question insertion. In Experiment 2 (N=27), we used two methods for teaching words: one requiring more effort on the part of children (questions) and one requiring less effort ("hotspots" that provide definitions). Results revealed that questions were more beneficial than just providing a definition or synonym of the target word. Implications for designing new e-book apps are discussed.