Sensation and Perception PSYCHOLOGY 1

Objectives -U-Understand the definition of sensation and perception; -D-Discuss concepts of threshold; -E-Explain signal detection theory and sensory adaptation; -F-Familiarize with sensory system; -E-Explain the movement of perception; -D-Determine between perceptual illusion and sound perception; -D-Discuss difference between olfactory and gustatory perception and -U-Understand special type of perception.

Definition In psychology, Sensation and Perception are stages of processing of the senses in human and animal systems, such as vision, auditory, vestibular, and pain senses.

Thresholds A minimum amount of stimulation needed to start a neural impulse. Divides the line between what energy can be detected or not. Absolute Threshold and Difference Threshold

Absolute threshold for our Senses Senses Absolute Threshold Equivalent VisionCandle thirty miles away on a clear, dark night HearingTick of a watch twenty feet away in a quiet room TasteTeaspoons of sugar dissolved in two gallons of water SmellOne drop of perfume in a three-room apartment TouchA bee’s wing falling on the cheek from a height of one centimeter Warmth or Cold A one to two degree celcius change in skin temperature

Signal-Detection Theory Signal detection theory (SDT) is used when psychologists want to measure the way we make decisions under conditions of uncertainty, such as how we would perceive distances in foggy conditions.

Sensory Adaptation

Visual Sensation Sense of Sight

Auditory Sensation Sense of Hearing

Olfactory Sensation Sense of Smell

Gustatory Sensation Sense of Taste

Cutaneous or Skin Sensation Sense of Touch

Sense OrganVarious SensesReceptor Cells EyesSightRods and cones in the retina EarsHearingHair cells in the Organ of Corti TongueGustatoryTaste cells in the taste buds NoseOlfactoryOlfactory Epithelium cells SkinPressure, pain, warmth, and cold Subcutaneous adipose tissues

The End