[감각및지각심리학] Monocular perception

Two extraordinary experiences

  When I wore an eye patch I could feel two extraordinary things. Firstly I experienced dimension of vision changing. My vision is like a flat picture at the art gallery and I percept something like a distortion of time. For example walking on the road and getting on the car, (of course, my friend drove the car) the sight seems to be pressed toward me. So I got surprised whenever the people or the cars which were long ways from me appeared bigger or faster than they really were. This experience was especially surprising when the object becomes close to me than far from me. I knew cognitively what are close or far to me and what are moving faster or slower but I felt uncomfortable with them and also could feel dizziness and tiredness of the eye which weren’t wearing the eye patch. 

  Secondly I experienced visual noise on my covered eye. Thinking about it, I didn’t close the eye intentionally because I blinded the eye with the patch that is enough to cover. So I should see only the black area of the patch, but what I saw was the very small white, gray, and black colored squares moving fast and randomly. It became clear when I lost my focus and saw emptily. I think that this experience is due to the compensatory activity of patched eye or the pressure of the patch on my eye.

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Two tests of visual capacity
- Let me figure out my perception, “The sight seems to be pressed toward me.”-

1. Measuring the distance; My friend put two pencils into certain distance and I guess that distance. I and two pencils were parallel to each other so this test was not a length guess test but a distance guess test. The result is like the below. (Two numbers on each trial indicate my guessed distance/ real distance.)

Binocular	13/13	67/64	5/4	21/16	43/45	19/20	72/82	21/22	28/34	58/54
B-gap	0	3	1	5	2	1	10	1	6	4
Monocular	42/45	18/21	17/14	10/7	20/21	12/10	23/26	10/9	55/58	27/27
M- gap	3	3	3	3	1	2	3	1	3	0

And I make a graph with the gap value between binocular condition and monocular condition.

 
  But as you can see, the gap of binocular condition is higher and more inconsistent. It gives me a wonder why the monocular condition is better against my expectation. In my thought, it’s because of nervousness, I should do well for the binocular condition and I don’t need to do well for the monocular condition, when I do this task. My general thinking and eye patch experience were that monocular condition has less information source and I feel odd, so the performance related to it will be worse than binocular condition. But the result of the above simple task wasn’t. It’s better for me to listen to the next class carefully, understand the different factors between two conditions and perform more delicate, controlled task.

2. Counting the moving beans; In this time, my friend tosses certain amount of beans quickly and I guess the numbers of the beans. (The maximum of the beans were 10.) I’d like to figure out my perception when I saw the moving object with one eye covered. The result is like the below. (Two numbers on each trial indicate my guessed number/ real number.)

Binocular	4/4	3/3	7/7	9/9	6/5	6/6	5/6	5/4	1/1	5/5
B-gap	0	0	0	0	1	0	1	1	0	0
Monocular	4/5	3/3	5/5	6/7	7/7	4/5	7/8	5/6	4/4	5/5
M- gap	1	0	0	1	0	1	1	1	0	0

And I make a graph with the gap value between binocular condition and monocular condition.

 
  The gap was not big for all condition, but on the side of the frequency for error trial, monocular condition has more bad performances. But I doubt that this difference is sufficient to say, ‘It is different.’ If I try again and again result would have no difference statistically. That is, my changed-one eye patched- perception for walking people and running cars are not because of motion related capacity but of other reason. I think that the reason is feeling of anxiousness, which implies that one eye covered experience could make me nervous and anxious like, ‘Oh I should be careful not to be shown like a fool to other people on the street’. But it’s not a level of feeling fear, so I thought that the experience was ‘strange’ or ‘being worse for moving objects’. Or the above task and my one eye covered experience can be related to the different aspects of the perception.