1. Senses and Perception
Chapter 4

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

3. 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

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

5. 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

6. The Eye

7. 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

8. The Ear

9. 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

14. Hearing tests Many sounds that humans cannot hear.
Where do you hear the sound