PSYC 2000 Chapter : 3 1 SENSATION
Document Summary
Intro to sensation: what is sensation, sensation - how our sensory receptors and nervous system receives and represents stimulus energies from our environment, detection, perception - how we organize and interpret sensory information. Identification: prosopagnosia disorder that illustrates distinction between sensation and perception; they can recognize faces but cannot identify people; face blindness , sensory receptors are specialized forms of neurons. Influenced by various factors such as motivations and expectations: varies with age, difference threshold lowest level of difference between two stimuli required for detection 50% of the time, detectable difference increases with size of the stimulus. Light characteristics: wavelength (hue/color) distance between wave peaks; determines hue (color we see) Intensity (brightness: amplitude waves" height; determines brightness, saturation (purity of a color, structure of the eye, surface of eye covered in clear membrane called cornea. Fixed curvature: the light then enters the eye through the pupil which is inside the iris (colored part of the eye).
