Effects of adult familiarity on social behaviours in Angelman syndrome.
In Angelman syndrome, kids approach mom over strangers only when mom locks eyes.
01Research in Context
What this study did
The team watched kids with Angelman syndrome during short play sessions.
Sometimes the child’s own mom played. Other times a stranger played.
The adults kept the same friendly face and voice every time.
Observers counted smiles, laughs, eye contact, and how close the child came.
What they found
Smiles, laughs, and eye contact stayed the same no matter who played.
Kids only moved closer to mom, and only when mom looked them in the eye.
Without eye contact, mom and stranger got the same low approach.
How this fits with other research
Meirsschaut et al. (2011) saw no mom-stranger difference in preschoolers with ASD.
They say an adult’s autism-friendly style matters more than the name tag.
Slaughter et al. (2014) flipped the lens: when adults copy the child, moms win big.
Familiarity sat quiet until imitation turned it into a social magnet.
Huntington et al. (2022) push the point into adulthood.
The same man with ASD picked different social rewards when mom ran the test.
Together the papers show: familiarity alone is weak; it needs the right trigger.
Why it matters
For Angelman syndrome, eye contact is that trigger.
Start teaching or assessing social skills with mom first, but only while she is face-to-face.
If mom looks away, expect the same withdrawal a stranger would see.
Use this quick check before group work or community outings.
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02At a glance
03Original abstract
BACKGROUND: Individuals with Angelman syndrome appear strongly motivated by social contact, but there have been few studies that have examined the relationship between sociability and familiarity. In this study we compared social behaviour in Angelman syndrome when in contact with mothers and strangers. METHODS: We systematically manipulated adult familiarity, eye contact and speech to examine the effect on social approach behaviours in children with Angelman syndrome. Eleven children (deletion 15q11-13) participated and were observed during interactions with their mother and an unfamiliar adult, while adult eye contact and talking were manipulated. Laughing and smiling, looking and social approach were observed. RESULTS: There was no effect of familiarity on laughing and smiling or eye contact. Participants showed more social approach towards their mother than the unfamiliar adult but only when their mother was looking at them. CONCLUSIONS: In Angelman syndrome, looking at adults, laughing and smiling appear to be unaffected by the familiarity of the adult. However, approach behaviours are more common with mothers than strangers. The function of the approach behaviours might be to increase investment from the primary caregiver.
Journal of intellectual disability research : JIDR, 2011 · doi:10.1111/j.1365-2788.2010.01364.x