AP (Advanced Placement) Psychology Sensation & Perception-Sensory Adaptations Revision (Page 1 of 2)

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Working of a Human Eye

We are able to see the object as light gets reflected on it which is made up of photons and waves measured by brightness and wavelengths. Hue (also known as color) is the dominant wavelength of light. Brightness is the physical intensity.

Vision results from the work of many di

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Theories of Vision

  • Ewald Hering gave a theory for color vision known as opponent-color or opponent-process which states that in the eye, there are two types of color-sensitive cells, one which give response to blue-yellow color and others responding to red-green. When one pair works, other stops w

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Loudness, Pitch and Timbre

Humans are sensitive to loudness and pitch in sound.

Loudness of a sound is determined by the amplitude or physical intensity of a sound wave.

The pitch in sound is determined by frequency, the pace of vibration or sound waves per second. Low frequency is perceived as low pitc

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Parts of the Ear There are three major parts of the ear:

  • Outer ear sends sounds to the middle ear through parts like pinna and the auditory canal.
  • Middle era starts with the tympanic membrane (also known as the ear-drum) which is seen all through the auditory canal, followed by the ossicles (three small bones), the last of which is t

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Major Theories on Hearing

  • Hermann von Helmholtz propagated the place-resonance theory of sound perception which stated that various parts of the basilar membrane give response to different frequencies.
  • Sound localization is easy to catch up with. The more the frequency of sound, the less the distance of

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