11 research outputs found

    ๊ฒฝํ—˜๊ณผํ•™์—์„œ์˜ ํ•ฉ๋ฆฌ์„ฑ์˜ ๊ฐœ๋…: ๋…ผ๋ฆฌํ•™์  ์ ‘๊ทผ๊ณผ ์‹ฌ๋ฆฌํ•™์  ์ ‘๊ทผ

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    ์ด ๋…ผ๋ฌธ์—์„œ๋Š” ์•„์ฃผ ํ•œ์ •๋œ ์˜๋ฏธ์˜ ํ•ฉ๋ฆฌ์„ฑ์— ๋Œ€ํ•˜์—ฌ ๋…ผ์˜ํ•˜๊ณ ์ž ํ•œ๋‹ค. ์ฒ ํ•™์—์„œ ํ•ฉ๋ฆฌ์„ฑ์€ ํ•˜๋‚˜์˜ ๊ฐœ๋…์œผ๋กœ ์ •์˜๋˜๊ธฐ๋ณด๋‹ค๋Š” ๋‹ค์–‘ํ•œ ์ธก๋ฉด์„ ๋ ๊ณ  ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ๋ณด์ธ๋‹ค. ์ฒ ํ•™ ์ด์™ธ์˜ ์˜์—ญ์—์„œ๋„ ํ•™์ž์™€ ๋ถ„์•ผ๋งˆ๋‹ค ๊ทธ ์ •์˜๋Š” ๋งค์šฐ ๋‹ค์–‘ํ•˜๋‹ค. ์ธ๊ฐ„์—๊ฒŒ ๊ด€์ฐฐ๋˜๋Š” ๋™์ผํ•œ ์‚ฌ๊ณ ๋‚˜ ํ–‰๋™์— ๋Œ€ํ•˜์—ฌ ์–ด๋–ค ํ•™์ž๋Š” ํ•ฉ๋ฆฌ์ ์ด๋ผ๊ณ  ํ•˜๊ณ  ๋‹ค๋ฅธ ํ•™์ž๋Š” ํ•ฉ๋ฆฌ์  ์ด์ง€ ์•Š๋‹ค๊ณ  ์ฃผ์žฅํ•œ๋‹ค. ๋‹ค์–‘ํ•œ ๋ชจ์Šต์„ ๋ ๊ณ  ์žˆ๋Š” ํ•ฉ๋ฆฌ์„ฑ์— ๋Œ€ํ•œ ์ •์˜๋ฅผ ๋ช…ํ™•ํ•˜๊ฒŒ ํ•˜์ง€ ์•Š์œผ๋ฉด,๋…ผ์˜์˜ ์ผ๊ด€์„ฑ์„ ์œ ์ง€ํ•  ์ˆ˜ ์—†๋‹ค.์ด ๋…ผ๋ฌธ์—์„œ๋Š” ํ•ฉ๋ฆฌ์„ฑ์„ ๋…ผ๋ฆฌ์— ๊ทผ๊ฑฐํ•œ ํ˜น์€ ๋…ผ๋ฆฌ์™€ ํ•ฉ์น˜๋˜๋Š” ์‚ฌ๊ณ ๋กœ ์ •์˜ํ•˜๊ณ  ๊ฐœ์ธ์˜ ์ถ”๋ก ์ด๋‚˜ ์˜์‚ฌ๊ฒฐ์ •๊ณผ์ •์˜ ํ•ฉ๋ฆฌ์„ฑ์— ๊ด€ํ•˜์—ฌ ๋…ผ์˜ํ•  ๊ฒƒ์ด๋‹ค.์ด ๋…ผ๋ฌธ์€ 2002๋…„๋„ ํ•œ๊ตญํ•™์ˆ ์ง„ํฅ์žฌ๋‹จ์˜ ์ง€์›์— ์˜ํ•˜์—ฌ ์—ฐ๊ตฌ๋˜์—ˆ์Œ(KRF-2002-074-HS1002

    Misuse of Exploratory Factor Analysis and Its Remedies

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    ์š”์ธ๋ถ„์„์€ ์‚ฌํšŒ๊ณผํ•™์—์„œ ๋„๋ฆฌ ์‚ฌ์šฉ๋˜๋Š” ๊ธฐ๋ฒ•์ด๊ธฐ๋„ ํ•˜์ง€๋งŒ ์—ฐ๊ตฌ์ž๋“ค์ด ๋ถ„์„๊ณผ์ •์—์„œ ํ•„์š”ํ•œ ๊ฒฐ์ •๋“ค์„ ๋นˆ๋ฒˆํ•˜๊ฒŒ ์ž˜๋ชป๋‚ด๋ฆฌ๋Š” ๊ธฐ๋ฒ•์ด๊ธฐ๋„ ํ•˜๋‹ค. ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ์š”์ธ๋ถ„์„์„ ์ˆ˜ํ–‰ํ•  ๋•Œ ์–ด๋– ํ•œ ๊ฒฐ์ •๋“ค์ด ํ•„์š”ํ•˜๊ณ  ์–ด๋–ป๊ฒŒ ๊ฒฐ์ •ํ•˜๋Š” ๊ฒƒ์ด ๋ฐ”๋žŒ์งํ•œ์ง€์— ๋Œ€ํ•˜์—ฌ ๋…ผ์˜ํ•˜์˜€๋‹ค. ํŠนํžˆ ์š”์ธ๋ถ„์„์˜ ์ž˜๋ชป๋œ ์ ์šฉ์ด ๋Œ€๋ถ€๋ถ„ ์š”์ธ๋ถ„์„์„ ์ฃผ์„ฑ๋ถ„๋ถ„์„์˜ ํ‹€ ์†์—์„œ ์ดํ•ดํ•˜๊ธฐ ๋•Œ๋ฌธ์ด๋ผ๋Š” ๊ด€์ ์„ ์ทจํ•œ๋‹ค. ๋”ฐ๋ผ์„œ ์ด ๋‘ ๋ฐฉ๋ฒ•์˜ ํ†ต๊ณ„์  ์ฐจ์ด์ ์„ ์‚ดํŽด๋ณด๊ณ  ์ฃผ์„ฑ๋ถ„๋ถ„์„์˜ ํ‹€์—์„œ ์š”์ธ๋ถ„์„์„ ํ•ด์„ํ•  ๋•Œ ์–ด๋– ํ•œ ๋ฌธ์ œ๊ฐ€ ์žˆ๋Š”์ง€๋ฅผ ๋ถ„์„ํ•˜์˜€๋‹ค. ์ด ๋…ผ๋ฌธ์€ ๋˜ํ•œ ์ž๋ฃŒ ์ ํ•ฉ๋ฐฉ์‹, ์ ํ•ฉ๋„ ์ง€์ˆ˜, ์š”์ธ์˜ ์ˆ˜์˜ ๊ฒฐ์ •๋ฐฉ๋ฒ•, ๊ฒฐ์ธก์น˜์™€ ๋ฒ”์ฃผ๋ณ€์ˆ˜๋“ค์˜ ์ฒ˜๋ฆฌ์— ๋Œ€ํ•œ ์ด์Šˆ๋“ค๋„ ๋…ผ์˜ํ•˜์˜€๋‹ค. Though the factor analysis is widely used in social science research, researchers make frequently unreasonable decisions when conducting these analyses. The study reviews and recommends which decisions must be made when conducting factor analyses. This study contends that one of the main reasons of the misuse is because researchers understand exploratory factor analysis(EFA) in the frame of principal component analysis(PCA). The paper provides methodological and statistical comparisons between two methods and the consequences of interpreting EFA results in the frame of PCA. This article also address the issues of data fitting method, fit indices, choosing number of factors, and treating missing data and categorical data.N

    Cognitive Biases in Judicial Decision Making

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    ์ด ๋…ผ๋ฌธ์˜ ์ดˆ๊ธฐ ํ˜•ํƒœ๋Š” ์„œ์šธ๋Œ€ํ•™๊ต ๋ฒ•ํ•™์—ฐ๊ตฌ์†Œ ํ•™์ˆ ๋Œ€ํšŒ์ธ ๋ฒ•๊ณผ ์ธ์ง€๊ณผํ•™์˜ ๋Œ€ํ™”์—์„œ ๋ฐœํ‘œ๋˜์—ˆ๋‹ค.๋ฒ•๊ด€์€ ํŒ๋‹จ์˜ ์ „๋ฌธ๊ฐ€๋กœ์„œ์˜ ํŠน์„ฑ๊ณผ ๋…ผ๋ฆฌ์  ์˜ค๋ฅ˜๋ฅผ ์ €์ง€๋ฅด๋Š” ์ธ๊ฐ„์˜ ํŠน์„ฑ์„ ๋™์‹œ์— ์ง€๋‹ˆ๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์—, ๋ฒ•์ • ์ƒํ™ฉ์—์„œ ํŽธํ–ฅ๋œ ํŒ๋‹จ๊ณผ ์˜์‚ฌ๊ฒฐ์ •์„ ํ•  ๊ฐ€๋Šฅ์„ฑ์ด ์กด์žฌํ•œ๋‹ค. ๋ฒ•๊ด€๋“ค์˜ ์ธ์ง€์  ํŽธํ–ฅ์ด ์กด์žฌํ•˜๋Š”์ง€, ์กด์žฌํ•œ๋‹ค๋ฉด ๊ทธ ์ •๋„๊ฐ€ ์–ผ๋งˆ์ธ์ง€๋ฅผ ์—ฐ๊ตฌํ•˜๋Š” ๊ฒƒ์€ ๋งค์šฐ ์ค‘์š”ํ•˜๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ •๋ฐ•ํšจ๊ณผ, ํ™•์ฆํŽธํ–ฅ, ํ›„๊ฒฌํŽธํ–ฅ๋“ค๊ณผ ๊ฐ™์ด ์ž˜ ์•Œ๋ ค์ง„ ์ธ์ง€์  ํŽธํ–ฅ๋“ค์ด ๋ฒ•๊ด€๋“ค์˜ ๋ฒ•์ • ์˜์‚ฌ๊ฒฐ์ •์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š”์ง€๋ฅผ ๊ฒฝํ—˜์ ์œผ๋กœ ์กฐ์‚ฌํ•˜๊ณ ์ž ํ•˜์˜€๋‹ค. 103๋ช…์˜ ํŒ์‚ฌ์™€ 76๋ช…์˜ ์‚ฌ๋ฒ•์—ฐ์ˆ˜์›์ƒ, 134๋ช…์˜ ๋Œ€ํ•™์ƒ์ด ์—ฐ๊ตฌ์— ์ฐธ๊ฐ€ํ•˜์˜€๊ณ  ์‹ค์ œ ์žฌํŒ์‚ฌ๋ก€๋ฅผ ์ˆ˜์ •ํ•˜์—ฌ ๋งŒ๋“  ์„ธ ๊ฐ€์ง€ ์žฌํŒ ์‹œ๋‚˜๋ฆฌ์˜ค๋ฅผ ์ด์šฉํ•˜์—ฌ ์‹คํ—˜์ด ์ง„ํ–‰๋˜์—ˆ๋‹ค. ์‹คํ—˜ ๊ฒฐ๊ณผ, ์„ธ ์ง‘๋‹จ ๋ชจ๋‘์—์„œ ์ •๋ฐ•ํšจ๊ณผ๊ฐ€ ๊ด€์ฐฐ๋˜์—ˆ์œผ๋ฉฐ ๊ทธ ์ •๋„๋Š” ์ง‘๋‹จ๋งˆ๋‹ค ๋‹ฌ๋ž๋‹ค. ํ•™์ƒ์ด ๊ฐ€์žฅ ๊ฐ•ํ•œ ์ •๋ฐ•ํšจ๊ณผ๋ฅผ ์‚ฌ๋ฒ•์—ฐ์ˆ˜์›์ƒ์ด ๊ทธ ๋‹ค์Œ์œผ๋กœ ๊ฐ•ํ•œ ํšจ๊ณผ๋ฅผ ๋ฒ•๊ด€์ด ๊ฐ€์žฅ ์•ฝํ•œ ํšจ๊ณผ๋ฅผ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ํ™•์ฆํŽธํ–ฅ์˜ ๊ฒฝ์šฐ, ์žฌํŒ์‹œ๋‚˜๋ฆฌ์˜ค์—์„œ๋Š” ๋ฒ•๊ด€๊ณผ ์—ฐ์ˆ˜์›์ƒ์ด ๋Œ€ํ•™์ƒ๋ณด๋‹ค ๋‚ฎ์€ ํŽธํ–ฅ์„ ๋ณด์˜€์œผ๋‚˜ Wason์˜ ์นด๋“œ ์„ ํƒ๊ณผ์ œ ๋‚˜ 2-4-6 ๋ฌธ์ œ์™€ ๊ฐ™์€ ์ผ๋ฐ˜ ์ถ”๋ฆฌ ๋ฌธ์ œ์—์„œ๋Š” ๋ฒ•๊ด€๋“ค์ด ๋„๋ฆฌ์–ด ๋Œ€ํ•™์ƒ๋ณด๋‹ค ๋†’์€ ํŽธํ–ฅ์„ ๋ณด์˜€๋‹ค. ๋ชจ๋“  ์ง‘๋‹จ๋“ค์ด ๋ฒ•์ •์‹œ๋‚˜๋ฆฌ์˜ค์—์„œ ์•ฝํ•œ ํ›„๊ฒฌํŽธํ–ฅํšจ๊ณผ๋ฅผ ๋ณด์˜€๋‹ค. ํ›„๊ฒฌํŽธํ–ฅ ์‹คํ—˜์—์„œ ํ”ผํ—˜์ž๋“ค์ด ํŒ๋‹จ์„ ๋‚ด๋ฆฐ ๋‹ค์Œ, ํŒ๋‹จ์„ ๋‚ด๋ฆฌ๋Š” ๋ฐ ์ œ์‹œ๋œ ์ฆ๊ฑฐ๊ฐ€ ์–ผ๋งˆ๋‚˜ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ–ˆ๋Š”์ง€๋ฅผ ํ‰์ •ํ•˜๊ฒŒ ํ•˜์˜€๋‹ค. ๋ฒ•๊ด€์ง‘๋‹จ์—์„œ๋Š” ์œ ์ฃ„, ๋ฌด์ฃ„ ํŒ๋‹จ์— ๋ฌด๊ด€ํ•˜๊ฒŒ ๋ช…ํ™•ํ•œ ์ฆ๊ฑฐ๋ฅผ ๊ฐ€์žฅ ์ค‘์š”ํ•˜๊ฒŒ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ๋ฐ˜๋ฉด, ์‚ฌ๋ฒ•์—ฐ์ˆ˜์›์ƒ ์ง‘๋‹จ์—์„œ๋Š” ์œ ์ฃ„๋กœ ํŒ๋‹จํ•˜์˜€์œผ๋ฉด ์œ ์ฃ„์ฆ๊ฑฐ๋ฅผ, ๋ฌด์ฃ„๋กœ ํŒ๋‹จํ•˜์˜€์œผ๋ฉด ๋ฌด์ฃ„ ์ฆ๊ฑฐ๋ฅผ ๋” ์ค‘์š”ํ•˜๊ฒŒ ํ‰๊ฐ€ํ•˜์˜€๋‹ค. ๋น„๋ฒ•์ • ์ƒํ™ฉ์—์„œ ์ •๋ฐ•ํšจ๊ณผ์™€ ํ›„๊ฒฌํŽธํ–ฅ์€ ์„ธ ์ง‘๋‹จ๊ฐ„์— ์ฐจ์ด๊ฐ€ ์—†์—ˆ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋“ค์€ ํŒ๋‹จ ์ „๋ฌธ๊ฐ€๋กœ์„œ์˜ ํŒ์‚ฌ๋“ค์€ ๋ฒ•์ •์žฅ๋ฉด์—์„œ ์ •ํ™•ํ•œ ํŒ๋‹จ๊ณผ ์˜์‚ฌ๊ฒฐ์ •์„ ํ•˜ ๋Š”๋ฐ ๋„์›€์„ ์ฃผ๋Š” ๋ฒ•์ • ์ถ”๋ฆฌ ์Šคํ‚ค๋งˆ๋ฅผ ํ˜•์„ฑํ•˜๊ณ  ์žˆ์Œ์„ ์‹œ์‚ฌํ•œ๋‹ค. ๋งˆ์ง€๋ง‰์œผ๋กœ ๋ฒ•์ •์žฅ๋ฉด์—์„œ ์ธ์ง€์  ์˜ค๋ฅ˜๋ฅผ ์ค„์ด๊ณ  ์˜์‚ฌ๊ฒฐ์ •์˜ ์งˆ์„ ์ œ๊ณ ํ•  ์ˆ˜ ์žˆ๋Š” ๋ช‡ ๊ฐ€์ง€ ๋ฐฉ์•ˆ๋“ค์ด ๋…ผ์˜๋˜์—ˆ๋‹ค

    A Study on the Difference in Clinical Performance by Comparing EEG Activity between Dentist Experts and Beginners in the Diagnostic Process

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    One of the most demanded competencies of an oral health professional such as an oral pathologist is the ability to make clinical decisions. The purpose of this study was to examine the neurological differences between beginners and experts in the clinical decision-making process which consisting of complex, dynamic and sophisticated cognitive processes, and to identify the characteristics of experts based on the brain by comparing EEG activity. This study conducted experimental design with 10 dentists with more than 10 years of clinical experience and 10 students with short clinical experience as beginners as a fourth year student before graduation. The hypothesis-oriented algorithm proposed in HOAC II was used. As a standard, the clinical decision-making stage of the dentist was divided into three stages, and an event was developed and an experiment was designed for measuring EEG for each stage. The cerebral activity distribution patterns of the two groups were measured with EEG, compared and analyzed with pre-processing process using EEGlab. As a result, the difference in the auditory information was not noticeable between the novice and the expert, but the difference between the group of the novice and the expert appeared in the visual data and the radiographic data. In the case of beginners, the activity was higher in the left hemisphere, and in the case of experts, both brains were activated. The results of this study are intended to present objective information based on brain-based analysis of differences that appear in the clinical decision-making process of experts and beginners. It can be used as basic research data to present the brain-based characteristic analysis of dentist experts.N
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