Ulric Neisser's Visual Search: The Study Of Cognitive Psychology

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Introduction Cognitive psychology is the study of mental representations that guide behavior. One way to investigate a brain function is through an experiment called Visual Search. Ulric Neisser’s Visual Search is one of the most famous ways to study a particular brain function, which in this case is perception and identification. More formally, it is a type of perceptual task that requires a scan of a visual environment for a certain target among other similar or distinct features. Ulric Neisser in 1964 created his study of Visual Search for the purposes of developing cognitive psychology. The aim of his experiment was to see whether round or angular letters affected one’s ability to locate a letter “Z” (Neisser, 1964). His method was to first ask a person to scan a list (consisting of fifty items) to find a specific target. The list was computer generated, each list either a set of round letters or angular letters with the letter “Z” randomly mixed in. The subject peered through a window onto a box with the list inside. Then he illuminated the list and started the timer. After the subject scanned the list and found the target, he turned the timer off. The results were that it took the subjects less time to find the letter “Z” in the set of round letters instead of the angular letters. He did not specify the age of his participants or the time of day that each subject took the test. Based off of Ulric Neisser’s study, the researchers are conducting an experiment with few modifications to the original experiment. For this experiment, the researchers will be creating their own list of round letters and angular letters, and randomly placing the letter “K” in each list. The AIM of this experiment is to see whether round or angula... ... middle of paper ... ...02 = 8.41 5.48 – 4.90 = 0.582 = 0.3364 2.18 – 4.90 = -2.722 = 7.3984 8.63 – 4.90 = 3.732 = 13.9129 4.11 – 4.90 = -0.792 = 0.6241 2.67 – 4.90 = -2.232 = 4.9729 5.10 – 4.90 = 0.202 = 0.04 3.50 – 4.90 = -1.402 = 1.96 2.40 – 4.90 = -2.502 = 6.25 4.25 – 4.90 = -0.652 = 0.4225 14.70 – 4.90 = 9.82 = 96.04 4.25 – 4.90 = -0.652 = 0.4225 5.88 – 4.90 = 0.982 = 0.9604 2.53 – 4.90 = -2.372 = 5.6169 6.30 – 4.90 = 1.402 = 1.96 5.51 – 4.90 = 0.612 = 0.3721 5.15 – 4.90 = 0.252 = 0.0625 0.4624 +3.9601 +0.5041 +1.0201 +0.0009 +0.6241 +0.144 +0.2916 +1.2321 +0.0676 +2.3104 +0.0961 +0.7921 +11.2896 +0.6561 +0.3249 +1.4161 +0.5776 +2.5281 + 0.0036 0.0225 +2.56 +0.2025 +8.41 +0.3364 +7.3984 +13.9129 +0.6241 +4.9729 +0.04 +1.96 +6.25 +0.4225 +96.04 +0.4225 +0.9604 +5.6169 +1.96 +0.3721 +0.0625 √28.3016/19 = 1.22 √152.5466/19 = 2.83 Appendix VII Continued: Calculations of Standard Deviation

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