Senses and Perception Chapter 4

Have you ever……. Been in a situation where you lost one of your senses? How would you feel?

Thresholds Absolute Threshold Difference Threshold Weakest amount of stimulus that can be sensed Difference Threshold Minimum amount of difference that can be detected between 2 stimuli Signal-Detection Theory The method of distinguishing sensory stimuli that takes into account not only their strengths but also such elements as setting, your physical state, your mood, and your attitudes

Sensory Adaptation The process by which we become more sensitive to weak stimuli and less sensitive to unchanging stimuli.

Senses Vision Hearing Smell Taste Touch What your eyes process through rods and cones in the eye Hearing What the hairs cells of the inner ear process Smell What receptor cells in the nose process Taste What taste buds on the tongue process Touch What sensations that nerve endings in the skin process

The Eye

Parts of the Eye Pupil Lens Retina Photoreceptors Black part of the eye, dilates to limit light into the eye Lens Changes thickness for depth perception Retina Sensitive part of the eye which acts like film in a camera Photoreceptors Rods and Cones in the Retina help to determine color and brightness

The Ear

Parts of the Ear Cochlea Auditory Nerve Contain fluid and neurons that move in accordance with vibrations Auditory Nerve Transmits information from the ear to the cerebral cortex

Hearing tests Many sounds that humans cannot hear. Where do you hear the sound http://www.youtube.com/watch?v=h5l4Rt4Ol7M