Triad

Question 1

Wing and Gould 1979

Answer 1

Using Kanners definition of Autism, explored the relationship between typical Autism, mental retardation and other social impairments.
All children with social impairments showed RRB’s and most showed language abnormalities- a tendency for them to occur together.
Sample was under 15’s only, issues with classifying behaviours and definition of Autism.

Question 2

Ronald et al 2005

Answer 2

2 typical behaviours for Autism are social impairment and RRB’s.
Using a sample >3000 7 year old twins found that social and non-social behaviours on correlated moderately, with extreme scores present on one scale and not the other.
Both behaviours are highly heritable according to gene modelling but there is little genetic overlap- suggesting considering these separately may be useful.

Question 3

Murray et al 2004

Answer 3

looked into how related ASD symptoms are found that many studies only use clincial ASD samples, which leads to range restriction of symptoms. therefore some studies may have under estimated how inter-correlated the ASD symptoms are.

Question 4

Mandy et al 2012

Answer 4

Using a 1,2 & 3 factor model to best describe Autism found that a 2 factor model in-line with DSM-5 was best used to explain the symptoms, therefore offering an alternative to the triad.