Insights into Rett Syndrome girls’ receptive vocabulary through eye movements and parental perception

Título: Insights into Rett Syndrome girls’ receptive vocabulary through eye movements and parental perception

Autores: Jucineide S. Xavier, Fernanda T. Orsati, Paulo G. Laurence, Lourenço K. Barbosa, Andressa S. Gouveia, Maria Eloisa F. D’Antino, Katerina Lukasova, Elizeu C. Macedo, José Salomão Schwartzman

Abstract:

  • Objective: This study evaluated the receptive vocabulary of girls diagnosed with Rett Syndrome (RS) by employing eye-tracking technology and examined how these objective measures compared with parents’ perceptions of their daughters’ language abilities.
  • Method: Fourteen girls with RS and eleven typically developing peers participated. Instruments included the Kerr Scale, a parental questionnaire on communication skills, the Peabody Picture Vocabulary Test – PPVT-4, and eyetracking equipment. The PPVT-4’s initial 12 cards, each displaying four images, were presented on screen for 5s for the child’s initial inspection. Subsequently, the same card was shown for 5s with instructions to identify the picture matching the word, repeated three times in a randomized order.
  • Results: Eye-tracking assessments revealed that girls with RS with less severe symptoms, performed below typically developing peers with aged 3–4 years. The number of eye fixations emerged as a reliable metric for assessing their performance. A positive correlation was found between parental reports of their daughters’ vocabulary knowledge and their ability to identify the correct stimulus, suggesting comprehension and active engagement in the testing process.
  • Conclusion: This study presents a pioneering approach by combining parental perceptions with eye-tracking measures to assess receptive vocabulary in girls diagnosed with Rett Syndrome. Despite showing lower performance levels compared to significantly younger peers, the findings suggest that these individuals use less effectively eye contact as a mode of communication.

 

Eur J Paediatr Neurol. 2024 Jul:51:1-8. doi: 10.1016/j.ejpn.2024.05.001. Epub 2024 May 4.

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