AP PSYCHOLOGY

Detailed explanation-1: -Sensation is the activation of sensory receptor cells at the level of the stimulus. Perception is the central processing of sensory stimuli into a meaningful pattern. Perception is dependent on sensation, but not all sensations are perceived. Receptors are the cells or structures that detect sensations.

Detailed explanation-2: -Sensation usually involves sensing the existence of a stimulus, whereas perceptual systems involve the determination of what a stimulus is.

Detailed explanation-3: -The difference threshold, is the minimum difference in the intensity of two stimuli necessary to detect they are different. For example, two lights may be illuminated at the same time. The difference threshold is reached when an observer can tell that one is brighter than the other.

Detailed explanation-4: -Absolute threshold refers to the minimum amount of stimulus energy that must be present for the stimulus to be detected 50% of the time. Another way to think about this is by asking how dim can a light be or how soft can a sound be and still be detected half of the time.