Author Question: Approximately ____ percent of intellectual disability cases can be attributed to known biological ... (Read 227 times)

tth · **on:** Jun 22, 2018

Approximately ____ percent of intellectual disability cases can be attributed to known biological abnormalities.

a. 5
b. 20
c. 50
d. 80

Question 2

In 1866, what did the British physician Langdon Down describe for the first time?

a. characteristics of autism
b. a subgroup of intellectual disabilities
c. the case of the wild boy of Aveyron
d. the condition of pervasive developmental disorder