IQ assessed as part of ASC assesment

The reason is that high functioning is defined as having an IQ greater than 70. It has nothing to do with anything else.  Thus someone could be e.g. non verbal but still high functioning.

"High functioning" is not a term that is used in the current Diagnostic and Statical Manual  (DSM-5 Textual Revision.)  The average IQ is 100, and one standard deviation on either side puts the range at 85 - 115 for about 2/3 of the population.  For education purposes an IQ of  70 >85 is suggestive of " Moderate Learning Difficulties ".  70 is generally regarded as the cut-off for learning disability, as about 2.2% of the population will have a measured IQ of  <70.

But IQ should be used with caution. Psychologists are now talking about "spiky profiles" when you measure individual competences.  www.employmentautism.org.uk/.../the-autism-spectrum-as-a-spiky-profile

"High functioning" is not a term that is used in the current Diagnostic and Statical Manual  (DSM-5 Textual Revision.)  The average IQ is 100, and one standard deviation on either side puts the range at 85 - 115 for about 2/3 of the population.  For education purposes an IQ of  70 >85 is suggestive of " Moderate Learning Difficulties ".  70 is generally regarded as the cut-off for learning disability, as about 2.2% of the population will have a measured IQ of  <70.

But IQ should be used with caution. Psychologists are now talking about "spiky profiles" when you measure individual competences.  www.employmentautism.org.uk/.../the-autism-spectrum-as-a-spiky-profile