Which of Erik Erikson's psychosocial crises revolves around whether the child can depend on the primary caregiver?

Your roommate's brother and sister-in-law just had a baby girl. Their daughter was born with very low birth-weight. What advice can you give them in terms of providing additional care for her?

a. Try infant massage. b. Leave her in her crib with a bottle to insure that she gets plenty to eat. c. Just be calm; there is not much a parent can do at this point. d. Get an infant monitor so that you can listen to her breathing constantly.

With this type of reinforcement schedule, the organism is reinforced for a response made at the end of variable time intervals

A) variable ratio B) fixed ratio C) variable interval D) fixed interval