Kendra's EEG recordings showed that she spent more time in REM sleep the night after she stayed awake for 24 straight hours. Kendra experienced _____

Which of the following statements is a formal definition of psychology?

a. Psychology is the scientific study of human nature. b. Psychology is the scientific study of theories and research methods. c. Psychology is the scientific study of the process of learning and modifying behavioral reflexes. d. Psychology is the scientific study of behavior and mental processes. e. Psychology is the scientific study of groups of people.

If you stare for 30 seconds at a red object and then look at a blank sheet of white paper, you will see a greenish image of the object. This phenomenon BEST supports the ______ theory of color vision

a. Grieco trichromatic b. opponent-process c. Helmholtz trichromatic d. Hering's vibration e. Ponzo's