Both questionnaire data and observational data, such as eye contact, positive vocalizations, and interaction quality, were used for evaluation purposes.
en.wikipedia.org In human beings, eye contact is a form of nonverbal communication and is thought to have a large influence on social behavior.
en.wikipedia.org Behavioral characteristics may include stereotypic movements (e.g., hand-flapping) and atypical social development, particularly shyness, limited eye contact, memory problems, and difficulty with face encoding.
en.wikipedia.org Autistic children can respond especially well to llamas, sometimes the expressive eyes of the animal help them make their first sustained eye contact.
en.wikipedia.org