According to Erikson's psychosocial theory, identity development is an extremely important aspect of

Russell travels frequently for his work, and he always keeps any pens that are offered at meetings, hotels, and restaurants. He knew that he or someone would make good use of them. When he began working with a counselor, his car and trunk were completely full of paper, and he had two gym bags full of pens. It is likely that Russell is suffering from:

a. OCD b. collecting disorder c. hoarding disorder d. kleptomania

"Rules of thumb" that are usually quick but which do not guarantee a problem solution will be found, are called:

a. algorithms b. homilies c. heuristics d. axioms