Sensation and Reception

Sensation and Reception - Chapter 5 Sensation Reception...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5 Sensation: Receiving Sensory Messages What messages can be received? Stimulus : Any aspect of the world that influences behavior or conscious experience Anything you can perceive/experience from the world Must excite receptor cells to be a stimulus! Ex. light, sound, flavors How are they received? Transduction : process of turning something from the world into a neural impulse Translating messages for the brain Translation of energy in the environment into neural impulses Transduced by sensory receptor cells Sensory limits: how strong must messages be? Absolute Threshold : Smallest magnitude of a stimulus that can be detected Ex. how dim a light can be before you can tell that it’s on Difference Threshold : Sensory Adaptation : When a stimulus is continuously present or repeated at short intervals, the sensation becomes gradually weaker Our nervous system becomes used to the same kind of stimulus Psychophysics : What kinds of stimuli changes can you detect? Like structuralist stuff, but much more refined Vision: Sensing Light Light : electromagnetic radiation Only a small portion is visible Intensity = brightness Wavelength = hue Brightness + Hue = Color The Eye ***Parts of the eye: Cornea clear covering that protects the eye Iris Pupil black hole
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Lens focuses the light on the retina Ciliary Muscle How it works: Retina 2 cells picking up light: Rods Cones color, used for bright light Fovea Has clearest image When reading, the fovea is jumping from word to word Sight Process: Light passes between the ganglion cells & bipolar cells, reaching rods & cones at the back of the retina
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 6

Sensation and Reception - Chapter 5 Sensation Reception...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online