This Is Annoying

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  • Topic: Depth perception, Binocular vision, Eye
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  • Published : January 29, 2013
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Depth Perception is Affected by Disturbing Binocular Vision Erica Roemhild, Department of Biology, University of Massachusetts Dartmouth eroemhild@umassd.edu, 508-991-0165 Absract: Depth perception in humans can be impeded by disturbing binocular vision. Disturbance (e.g. covering one of two eyes with an eye patch) should impede hand-eye coordination. This statement was tested on 19 human subjects under two experimental conditions: binocular vision and monocular vision. When tested for monocular vision, subjects were to cover their right eye with an eye patch and place as many paper clips, with first their right hand and then later their left hand, in an Erlenmeyer flask placed at arm distance on the lab bench within 30 seconds. The same procedure was followed under the binocular vision but this time the subjects did not have to cover their right eye.Table 1 summarizes all of the data collected from all of the subjects ( observed values). Table 2 shows the “expected values” of vision impedance on the human subjects’ depth perception. Tables 3 and 4 show a contingency table with observed, expected, and summation values. Figure 1 shows the mean number of paper clips placed through binocular and monocular vision on either hands. Monocular vision had a fewer number of successful attempts versus binocular vision. Binocular vision allows for proper depth perception, an important adaptations for organisms like humans, who need to ambulate bipedally, hunt, forage, go up stairs, avoid holes in the ground, the ability to see your environment with a wider perception and not have to be always turning your head to look at something, and to see your environment around you when you are trying to escape from a predator. Hypothesis: There is a difference between depth perception through monocular vision and depth perception through binocular vision. Table 1. Effect of vision disturbance on human subjects’ depth perception. the effect was measured as number of paper clips successfully added to a flask during monocular vs. binocular vision. Name| Monocular| | Binocular| | |

| Right| Left| Right| Left| Total Row|
Grace| 17| 21| 24| 23| 85 |
Hayat| 21| 19| 23| 21| 84 |
Shifa| 24| 27| 23| 26| 100 |
Stephen| 29| 31| 35| 33| 128 |
Jordan| 22| 28| 21| 26| 97 |
Sarah| 24| 21| 30| 28| 103 |
Lauren| 17| 18| 19| 20| 74 |
Christine| 27| 25| 26| 23| 101 |
Barbara| 23| 15| 20| 20| 78 |
William| 18| 16| 15| 14| 63 |
jamison| 20| 18| 18| 15| 71 |
Erica| 19| 20| 24| 20| 83 |
collark| 20| 19| 23| 22| 84 |
nina| 20| 23| 23| 20| 86 |
mariano| 17| 16| 17| 15| 65 |
syzanre| 20| 16| 22| 22| 80 |
joshwa| 16| 16| 17| 16| 65 |
kate| 20| 22| 17| 23| 82 |
cary| 15| 17| 21| 20| 70 |
Total Columns | 389 | 388 | 418 | 407 | 1602 | | | | | | Grand Total|

Figure 1. Mean number of paper clips added to a flask during binocular versus monocular vision testing. ( Chi-square = 13.49 , df= 54, P0.05).

Data Source for Figure 1.

Hand| Mean Number of Paper Clips|
Right Hand Monocular Vision| 20.4736842105263|
Left Hand Monocular Vision| 20.421052631579|
Right Hand Binocular Vision| 22|
Left Hand Binocular Vision| 21.421052631579|

Table 2. “ Expected Values” of vision impedance on human subjects’ depth perception.

| Monocular| | Binocular| | |
| Right| Left| Right| Left| Row Data fromTable 1|
| 20.63982521| 20.58676654| 22.1785268414482| 21.5948813982522| 85| | 20.39700375| 20.34456928| 21.9176029962547| 21.3408239700375| 84| | 24.282314732| 24.21972534| 26.0923845193508| 25.4057428214732| 100| | 31.08114856| 31.00124843| 33.398252184769| 32.5193508114856| 128| | 23.5536829| 23.49313358|...
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