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Abstract:
We are doing this experiment to see if girls or boys have better depth perception. Boys have always been know to have better depth perception, however according to research, depth perception and optical illusions that require you to be able to focus in on different images requires a heavy use of the right side of your brain. The right side deals with mainly emotions and imagination; girls use the right side of their brain most of the time, while boys are mainly left-brained. Since girls are right-brained, and depth perception is in the ride side of your brain then we think that girls will have better depth perception than guys.
Title: Depth Perception
Purpose:We are doing this because we want to know if boys or girls have better depth perception. Depth Perception has to do with the ability coordinate the use our right and left eye and to make use of differences between the two images received by each eye allows us to perceive depth.("Neuroscience") There are seven different problems that can occur which make it difficult to judge distances when you are only looking with one eye. The first one is interposition, this is when objects over lap we think that the one being partly covered is farther back when it actually isn't. Another is size and color cues, we know what size and color certain items are suppose to to be, so it helps us judge how far away they are, but when something is changed our brain tells us it isn't even though it really has. Their is also linear perspective, this refers to the fact that parallel lines, such as railroad tracks, appear to converge with distance.("Introduction to Perception") Optical Illusions use these things and other to trick your brain into seeing something that may not really be true. Optical illusions use the same part of the brain that is used for depth perception. Optical illusions also use different color schemes to make a hidden picture which not everyone can see due to their depth perception. You have what are called floaters in your vision, they are small specks which float into your vision and throw off you depth perception and create blind spots which is why optical illusions can sometimes be so difficult.(Nierenberg, Cari) Depth perception is the ability to see in three dimensions and to be able to judge the distances of objects from someone. Without depth perception we couldn't to tell how far objects are away from us, and how far we would need to move to reach or avoid them, which could make us run into objects more often. (Lerner, 2004) Both Depth Perception and Optical illusions require the use of the right side of your brain. We think that girls will do better because they use their right side of their brains more than boys.
Hypothesis: If we do these tests, then girls will have better success at the depth perception tests.
Procedure: We will have two different tests to see if boys or girls have better depth perception. You might want to make sure the people you are using don't have something wrong with their eyes. Contacts, glasses, and other things might change your results. (Faivre)
Test 1. The student will sit at a table and two feet away from then, there will be a cup. With one eye closed, the person will try to place the penny in the cup. The hand of the person must be above the cup.
Materials: The materials that will be used are: one cup, one coin, and piece of paper with a dot on it. How many students are you using? will they all be the same age? whether they play a sport or not might also have to do with depth perception. (Moore)
Data:
this graph looks small, any ways you can expand it?(Ryan Porch). Couldnt your results be diferent based on the person you use (Grant Nichols)

Chart.png
Dropping Data for boys
right eye covered
left eye covered
3/3
3/3
2/3
3/3
2/3
3/3
1/3
2/3

Dropping Data for girls
right eye covered
left eye covered
3/3
3/3
3/3
2/3
3/3
3/3
2/3
2/3

Illusion time test

Girl Times
Boy Times
00.45.45
1.24.33
1.03.13
00.38.00
00.43.19
1.33.78
1.04.94
00.26.71
Average: 54.18
Average: 60.69

One Eyed Throwing Tests for Boys
Boy Throws (Right Eye Covered)
Boy Throws (Left Eye Covered)
0 for 3
0 for 3
1 for 3
0 for 3
0 for 3
1 for 3
0 for 3
1 for 3
Average: 0.25 for 3
Average: 0.5 for 3
One Eyed Throwing Tests for Girls
|| Girl Throws (Right Eye Covered)
Girl Throws (Left Eyed Covered)
3 for 3
1 for 3
0 for 3
0 for 3
2 for 3
0 for 3
1 for 3
1 for 3
Average: 1.5 for 3
Average: 0.5 for 3

Analysis:
As you can see in the throwing test graph, the girls did consistently better than the boys. Also, in the illusion and dropping graphs, it shows the girls as more successful than the boys; the trends in this experiment were pretty basic.The data for the boys throwing tests showed that out of the twenty four trials, only three tosses were successful. I do not believe athleticism was was a factor in these trials for a couple reasons. The non-athletes as well as the boys who participated in athletics preformed about the same. Not only did the athletes make successful throws, but non-athletes also had successful throws. This was the same for the girls, both athletes and non-athletes tossed successful tosses. The data for the girls showed that the toss with the left eye covered was more successful. This must show that the right eye is stronger, or has better depth perception, than the left eye. Also, for the boys, the tossing tests with the left eye covered had better results.

For the illusion tests, the girls (on average) did about 6 seconds better than the boys. Although the girls did better all together, fastest time for this test was achieved by a boy with a time of 26.71 seconds, which beat the girls fastest time, 43.19. by 16.48 seconds, which is a large time span. However, the slowest time for girls (1.04.94) and boys (1.33.78) differed by 28.84 seconds, which is also quite a bit. During the tests, no matter if it was a girl or a boy, all the test takers struggled on the same picture. Some figured it out quicker than others, but for some, it took quite a long time.

For the dropping tests, the graphs show both the boys and girls doing well, however, the girls once again had better percentages missing only 3 drops out of the 24 trials, getting 87.5%. Boys missed 5 out of the 24 trials earning 79.2%. This time for the test, girls did better with their right eye covered, whereas boys did better with their left eye covered. Going by this data, it is hard to tell which eye has better depth perception. I have heard that with only one eye, it is very hard to tell depth. I guess that is true, perhaps, if we tried all these tests with both eyes, everyone may have done better.

Conclusion: In our first hypothesis, we said, "If we do these tests, then girls will have better success at the depth perception tests.", and we accepted this hypothesis because our information was a direct correlation with this hypothesis. On average, all the tests were performed better by the girls that the boys.

Limitations: 1.)Some people play sports and some don't. The people that play sports probably have better depth perception so if we accidentally picked more girls who play sports then guys who play sports than out data will be more sport vs. not sport instead of girl vs. guy. "Than" should be used with like more than or less than stuff. "Then" should be used with before or after stuff (and pretty much everywhere you didn't use "than") Allie We could get rid of this problem by only picking people who don't play any sports. 2.) Another problem is some people wear glasses or contacts. People who wear glasses might not have as good of depth perception as people with perfect vision, and some people don't have good vision and don't wear their glasses. To get rid of this problem we would have to only uses people who have glasses, or only use people that don't have glasses. 3.) Also some of the people might have seen one of the optical illusions before, so it wouldn't have been very hard for them.To make sure this didn't happen we could ask them if they had seen any of them afterwords and if they had, we would not use them for our results. 4.) Another thing that might have changed our data was that when they covered their right eye they would use their right hand to cover and their left hand to throw. If they weren't left handed then this might have been the reason why they woud miss. In order to correct this they should cover their eye with their weak hand all the time so that they are always using their stronger hand to throw or drop the coin. Our new hypothesis would be that if a girl plays sports, then she will have better depth perception then a girl who doesn't play sports.

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"Depth Perception Test." Media College.com. Web. 20 February 2012.
"Neuroscience." Nature.com. Nature Publishing Group. Web. 20 Feb. 2012. http://www.nature.com/nrn/journal/v8/n5/abs/nrn2131.html.
"Introduction to Perception." Depth Perception. Web. 20 Feb. 2012. http://www.sapdesignguild.org/resources/optical_illusions/intro_depth.html.
"Girl Brain, Boy Brain?: Scientific American." Science News, Articles and Information. Web. 22 Apr. 2012.
http://www.scientificamerican.com/article.cfm?id=girl-brain-boy-brain.

Nierenberg, Cari. "Optical Illusions: When Your Brain Can't Believe Your Eyes." Abc News. 13 Oct. 2009. Web. 20 Feb. 2012. http://abcnews.go.com/Health/EyeHealth/optical-illusions-eye-brain-agree/story?id=8455573.
Macknik, Stephen L. "The Neuroscience of Illusion: Scientific American." Science News, Articles and Information. 28 May 2008. Web. 20 Feb. 2012. http://www.scientificamerican.com/article.cfm?id=the-neuroscience-of-illusion.
Lerner, Brenda W. Depth Perception. The Gale Encyclopedia of Science. By Lee K. Lerner. 4th ed. Vol. 6. Detroit: Gale, 2004. Gale VIrtual Reference Library. Web. 28 Feb. 2012.
http://go.galegroup.com/ps/retrieve.do?sgHitCountType=None&sort=RELEVANCE&inPS=true&prodId=GVRL&userGroupName=washington_chs&tabID=T003&searchId=R1&resultListType=RESULTexternal image insert_table.gif