According to dynamic systems theory of motor development, each new skill is a joint product of central nervous system development, the body's movement capacities, the child's goals, and

How does the amount of time between a CS and the UCS compare in classical conditioning of a salivary response and in taste-aversion learning?

a) Any time interval works effectively. b) In both cases the interval between the CS and UCS can be as long as four hours. c) Conditioning a salivary response requires a very short interval; taste-aversion learning occurs with intervals of an hour or longer. d) Conditioning a salivary response occurs with intervals as long as an hour, taste-aversion learning occurs with short intervals only.

Which of the following is one of the ethical principles that psychologists must follow when using human participants? All participants must be

a. informed that they can withdraw from the study at any time. b. informed of the true nature of the study upon arriving at the laboratory. c. contacted six months after the study to assure that no psychological harm resulted. d. compensated in some way for their participation in research.