splab#2virtual.

splab#2virtual. - 68 1.2%85 44 22890 -34 0% 09.7% 4 4...

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9.7% 10.12% 10.9% 10.5% 10.8% 10.3% 11% 11.9% 9.6% 10.3% On average (t-test): 13.5% or 1351 difference. 2890 2788 2584 2686 2652 2720 2618 2414 2992 2720 On average: 2706.4 difference. 68 -34 -238 -136 -170 -102 -204 -408 170 -102 Average JND: -304 (Showing favor in underestimation). 2822 2822 2822 2822 2822 2822 2822 2822 2822 2822 1.2% 1.6% 1.01% .96% 1.07% .97% 1.08% 1.11% 1.17% 1.2% On average (t-test): .94% or 9.34 difference. 85 82 86 90 81 89 80 78 74 70 On average:70 line difference. -2 -5 -1 3 -6 2 -7 -9 -13 -17 Average JND: -5.5 (Showing favor in underestimation). 87 87 87 87 87 87 87 87 87 87 44 44 44 44 44 44 44 44 44 44 0% .84% .91% .84% -.91% 0% 0% .88% .84% .91% On average (t-test): .43& or 4.31 difference. 0 -8 -4 -8 -4 0 0 -16 -8 -4 Average JND: -4.8 (Showing favor in underestimation). 44 52 48 52 -48 44 44 50 52 48 On average: 34.6 pixel 44 52 48 52 -48 44 44 50 52 48 On average: 34.6 pixel difference. Just Noticeable Differences Running head: Just Noticeable Differences Virtual Lab Just Noticeable Differences Virtual Lab Avery Goodwin Ripon College Just Noticeable Differences Virtual Lab
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Just Noticeable Differences The Just notable difference illusion test also known as the JND is a test very similar to the Muller- Lyer test. Like the Muller- Lyer test it measures the DL (difference threshold) in this case particular DL is recognized as the JND (just notable difference). According to Goldstein, the JND is “The smallest differences between luminance’s; colors, areas, usually being adjacent to each other, and can easily be discerned or is obvious from ordinary observation (387)”. I.e. The experimenters own eye perception, conducting to match the difference, making our results be in accordance with the “difference threshold”. This test alone has three different stimuli being tested and the stimulus test different measurements in the brain. The JND measures the difference we perceive in: area, length, and color saturation. This test just like the Muller- Lyer test, test the DL. In the Just Noticeable Difference test is “the smallest differences between two stimuli that a person can detect (14).” In which case we find these expected differences through our perception. Our perception being: the measured area differences, the length differences, and the saturation differences. When looking back to our Muller- Lyer test we can recall our perception being somewhat cognitively influenced. In this specific test it is actually very notable to provided that there is defiant cognitive influences making our perception be swayed. This is due to our ability to have a “standard stimulus” subtracted from the “comparison stimulus” we create. Considering in this specific test we are able to pick our own DL rather than having it given to us (like the Muller-Lyer), we can see our personal cognitive reasoning. Basically when undergoing the process of this test we are able to measure out our own “comparison stimulus”. With this ability, our perception has much influence
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This note was uploaded on 05/02/2011 for the course PSY 400 taught by Professor Petersik during the Spring '11 term at Ripon College.

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splab#2virtual. - 68 1.2%85 44 22890 -34 0% 09.7% 4 4...

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