In a dark room, lighting one candle adds a lot of brightness. However, in a room with 100 lit candles, lighting one candle has little effect. This example can be explained by Select one: a. sensory adaptation. b. perceptual constancy. c. Weber's law. d. the Law of Effect. The gray matter of the brain is called the Select one: a. hypothalamus. b. cingulate gyrus. c. cerebral cortex. d. medulla oblongata. The Department of Motor Vehicles recently completed a study that indicated there is a negative correlation between the age of the driver and the number of errors on the written driving test. This result means that Select one: a. The older the driver, the more errors on the driving test. b. Younger drivers should not be allowed to drive. c. The older the driver, the fewer errors on the driving test. d. Older drivers should not be allowed to drive. The Department of Motor Vehicles recently completed a study that indicated there is a negative correlation between the age of the driver and the number of errors on the written driving test. This result means that Select one: a. The older the driver, the more errors on the driving test. b. Younger drivers should not be allowed to drive. c. The older the driver, the fewer errors on the driving test. d. Older drivers should not be allowed to drive. Early in the history of psychology a memory researcher (Ebbinghaus) used himself as the only research participant in his study. Given this information, what might cause you to be skeptical about his results? Select one: a. The results were not gathered scientifically. b. The sample was probably not representative. c. People are smarter than they used to be. d. Most studies of memory focus on college students. A change in the wavelength of light would result in a change in Select one: a. brightness. b. saturation. c. hue. d. intensity.