Early studies of pattern recognition were done by

Which of the following glands regulates the activities of the other four?

a. Adrenal medulla b. Adrenal cortex c. Parathyroid d. Pituitary e. Thyroid

Words have no physical resemblance to the concepts they represent, and function as social

conventions. In Piaget's terminology, words are a. symbols. b. signs. c. identifiers. d. signifiers. e. stabilizers.