What are unobservable variables, such as internal states or cognitions, that are assumed to influence behavior?

What is the major drawback in using algorithms with large, complicated problems?

a) Algorithms do not work at all if the problem is large. b) It is impossible to derive algorithms for large problems. c) With large problems, you must use heuristics rather than algorithms. d) They can be time consuming if there are too many algorithm choices to consider.

No one knows exactly how ECT works

a. True b. False