Assignment: Psychological dimensions of vision.
Assignment: Psychological dimensions of vision.
Unless otherwise stated, answer in complete sentences, and be sure to use correct English, spelling, and grammar. Sources must be cited in APA format. Your response should be double‐spaced; refer to the “Format Requirementsʺ page for specific format requirements.
Part I: Describe the three psychological dimensions of vision.
For Part II: of the written assignment, explain why the following course objectives are important to understanding psychology:
5. Define circadian rhythms and explain how the body’s “biological clock” works and what happens when it doesn’t.
6. Distinguish between the basic processes of sensation and perception, explain how the doctrine of specific nerve energies applies to perception, and discuss how synesthesia contributes to our understanding of sensory modalities.
7. Describe the basic principles of classical conditioning, including the extinction and recovery of a classically conditioned response, how higher-order conditioning takes place, and the process of stimulus generalization and discrimination.
8. Compare social norms and social roles, and note how each contributes to the social rules that govern a culture.
Please reference and include at least three scholarly articles within your response. The minimum word count should be 750 words. Overall response should be formatted according to APA style, with the total assignment between three to six pages, pages not including title page and reference page.
Permalink: Light. The stimulus for vision is light, which travels in waves. The amplitude (wave height) is associated with the sensory experience of brightness; the wavelength determines the hue (color) of the light; and the wave purity (whether there is more than one type of wave) produces the psychological experience of saturation.
The vision system. Light travels to the eye and passes through the cornea, the pupil (regulated in size by the iris), and the lens and then moves to the retina, where it strikes the photoreceptors for vision, the cones and the rods. The cones, in the center (fovea) of the retina, are responsible for color vision, and operate best in intense illumination. The rods are important for night vision and peripheral vision and have a greater density at the edge of the retina. Visual information proceeds from the eye through optic nerves attached to the retina at the back of each eye; the optic nerves meet and then divide at the optic chiasm in the center of the brain (Figure ). The lateral portion of each optic nerve travels from the optic chiasm to the lateral visual cortex on the same side of the brain (that is, the outside of the right nerve to right visual cortex and the outside of the left nerve to the left visual cortex). However, the medial portion of each nerve crosses over at the optic chiasm and goes to the medial visual cortex on the other side of the brain (medial right nerve to left medial visual cortex and medial left nerve to right medial visual cortex).
Figure 1
The visual pathway
Color vision. The three primary colors are red, green, and blue. Two theories suggest the way the eye functions in color vision.
- The Young‐Helmholtz trichromatic theory of color vision, proposed by Thomas Young and Hermann von Helmholtz, states that the eye has three types of cones with different sensitivities to lights of different wavelengths that produce the primary hues of red, green, and blue.
