sensation.pdf

Sensation VS. Perception  Sensation  When our sensory organs (eyes, ears, nose etc.) react to sensory information that they are sensitive to.  Perception  How our brain interprets the signals sent from the sensory organs, and attributes meaning to them. Sensory Receptors  Transduction  proce...

Sensation VS. Perception  Sensation  When our sensory organs (eyes, ears, nose etc.) react to sensory information that they are sensitive to.  Perception  How our brain interprets the signals sent from the sensory organs, and attributes meaning to them. Sensory Receptors  Transduction  process that converts a sensory signal to an electrical signal, to be processed in a specialized area in the brain.  Ex.  Light enters the eye, and an electrical signal is through the rods and cones (receptors) to the occipital lobe.  The occipital lobe communicates with the rest of your brain to tell you what it is seeing (LibreTexts, 2022) How many senses do we have? Sight Smell Taste Touch Hearing Proprioception is the sense that lets us perceive the location, movement, and action of parts of the body. Vestibular contributes to our ability to maintain balance and body posture. Rods and Cones in the Retina Rods  peripheral retina  detect black, white and gray  Soft light or low light Cones  near center of retina  fine detail and color vision  daylight or well-lit conditions Colour Vision Opponent-Process Theory Cones organized into three classes: Red/green, blue/yellow, black/white Somatosensory System (Touch) The Somatosensory system - is the sensory system concerned with the conscious perception of touch, pressure, pain, temperature, position, movement, and vibration, which arise from the muscles, joints, and skin. This information is then sent through our nervous system to the Somatosensory cortex, which processes touch. What is Perception Dependent Upon? Attention  Sensation  Attention  Perception  Exposure  Selection  Interpretation  Perception requires attention Attention  Your attention was immediately (and involuntarily) drawn to the salient item.  Once you attended to it, you could perceive it. Information Processing Model Sensation is unlimited Perception is limited by a ention We only perceive what we pay attention to Information Processing Model Information processing is influenced in two directions: Bottom-up Information from our senses Top-down Effects of our prior knowledge Context and our expectations affect what we perceive.