by "ASPD" do you mean aspergers? or does it stand for something else?

aspies lack the social knowledge, but they do have empathy. most lack the ability to show it. and may later review what was said, and at that later time they will realize it. they are usually very friendly people. just needing a different understanding, as its hard for them to understand all of the "common" social rules and behaviors.

since the latest dsm (version 5, i think)that came out last year, there are 3 diagnosis under the autism spectrum. and the others were changed to a different diagnosis that is no longer on the spectrum.
classic autism, aspergers, and PDD-NOS are known under the autism spectrum disorders.