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Eye-Tracking Reveals Agency in Assisted Autistic Communication

πŸ“„ Original study β†—
Jaswal, Vikram K, Wayne, Allison, Golino, Hudson β€’ 2020 Current Era β€’ nonverbal

πŸ“Œ Appears in:

⚑ Facilitated Communication

Plain English Summary

Can nonspeaking autistic people really author their own messages when pointing to letters on a board, or is someone secretly guiding them? This study tackled that explosive question with hard data. Nine nonspeaking autistic young adults wore eye-tracking headsets while answering questions via a hand-held letterboard. Results were striking: letter accuracy hit 94%, and their eyes landed on the correct letter before their finger did about 71% of the time β€” by nearly half a second. You simply cannot explain that as the assistant cueing them. Their spelling timing also mirrored fluent non-autistic typists: longer pauses between words, faster movement through common letter pairs. This is the first objective eye-tracking evidence that these communicators genuinely author their messages β€” directly challenging organizations that dismiss all letterboard communication as facilitator-controlled.

Research Notes

First objective eye-tracking study of letterboard communication by nonspeaking autistic individuals, published in Nature's Scientific Reports with open data (OSF: osf.io/jzdc6). Directly challenges ASHA position statements classifying all assisted communication as facilitator-authored. Central to Controversy #9 (facilitated communication). University of Virginia, funded by College of Arts & Sciences.

Nine nonspeaking autistic young adults who communicate by pointing to letters on a hand-held letterboard wore head-mounted eye trackers while answering 24 comprehension, spelling, and open-ended questions about a lesson read aloud by a familiar assistant. Frame-by-frame video coding (30 fps, inter-rater ΞΊ = 0.88–0.94) showed letter accuracy of 94%, word accuracy of 83%, and a median inter-point interval of 952 ms (~1 letter/second from 26 alternatives). Anticipatory gaze fixations preceded pointing on 71% of letter selections by a median of 476 ms. IPI was significantly longer at word boundaries (b = 0.75, p < .0001) and shorter for high bigram-frequency pairs (Ξ² = βˆ’0.18, p < .0001), paralleling timing signatures of fluent spelling in non-autistic typists. These patterns render a cueing account unlikely and provide objective evidence that the participants, not the assistant, authored their communications.

Links

DOI: 10.1038/s41598-020-64553-9

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πŸ“‹ Cite this paper
APA 
Jaswal, Vikram K, Wayne, Allison, Golino, Hudson (2020). Eye-Tracking Reveals Agency in Assisted Autistic Communication. Scientific Reports. https://doi.org/10.1038/s41598-020-64553-9
BibTeX 
@article{jaswal_2020_eyetracking,
  title = {Eye-Tracking Reveals Agency in Assisted Autistic Communication},
  author = {Jaswal, Vikram K and Wayne, Allison and Golino, Hudson},
  year = {2020},
  journal = {Scientific Reports},
  doi = {10.1038/s41598-020-64553-9},
}