What percent of individuals in developed countries attend college or other post-secondary training?

Suppose you walk down an alley in a large city and see someone sleeping who appears to be homeless. You may wonder, "Why is this person homeless?" If you commit the fundamental attribution error, which of the following might be your answer?

The units of a connectionist model that are neither the input nor the output units are called what?

a. metric units b. parallel units c. connecting units d. hidden units