"The classification of mental deficiency aroused a healthy debate in the early twentieth century, with the following classifications wining general acceptance:
idiots – who could not develop full speech an had mental ages below three;
imbeciles – who could not master written language and ranged from three to seven in mental age and;
high-grade defectives – the people who could be trained to function in society thereby establishing a bridge between pathology and normality (Gould, S., 1996). Goddard, the director of research at the Vineland Training School for Feeble-Minded Girls and Boys in New Jersey, coined his own label for the high-grade defectives, labeling them "morons" from the Greek meaning foolish."
No reference found for pinhead.
Therefore science rates as follows;
3. idiot 2. imbecile 1. high grade defective "moron"
pinhead does not get rated scientifically
David Weed aka the Bird of Prey www.warp-drive.com
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