PS 101 Lecture Notes - Lecture 4: Hair Cell, Retina, Midbrain
Document Summary
Ps101 chapter 4: sensation and perception: no one-to-one correspondence between physical/psychological reality, sensation and perception are active (brain helps with selection, sensory and perceptual processes reflect evolutionary pressure. Absolute threshold: lowest intensity of stimuli 50% of the time. Difference threshold: lowest level of stimulation required to sense a change. Sensory systems to respond less to stimuli that continue without change. Vision: eyes are sensitive to a small portion of light. Rods: sensitive to light, allowing vision in dim light: see black, white, and grey. Color perception happens in retina with rods and cones specialized in blue, green, and red colors. From auditory nerve info goes to medulla, crosses to other hemisphere. Pitch perception: can"t hear higher sounds, ear structure ages. Habituation: sounds that you can"t hear anymore because there is damage to the hair cells that transmit sound waves. Culture and social environment: different tastes in different places. People see food and automatically know how it tastes.
