{"id":636,"date":"2026-01-02T11:30:00","date_gmt":"2026-01-02T02:30:00","guid":{"rendered":"http:\/\/waurimal.kr\/?p=636"},"modified":"2026-01-05T21:37:53","modified_gmt":"2026-01-05T12:37:53","slug":"chap29-%ed%98%bc%ed%95%a9%eb%aa%a8%ed%98%95mixture-models","status":"publish","type":"post","link":"http:\/\/waurimal.kr\/?p=636","title":{"rendered":"Chap 29. \ud63c\ud569\ubaa8\ud615(Mixture Models)"},"content":{"rendered":"\n<p>\uc548\ub155\ud558\uc138\uc694?<br>\uc774\ubc88\uc5d0\ub294 \uad50\uc721 \uc5f0\uad6c\uc5d0\uc11c \uc9d1\ub2e8\uc758 \uc774\uc9c8\uc131\uc744 \ud30c\uc545\ud558\ub294 \uc544\uc8fc \uac15\ub825\ud55c \ub3c4\uad6c\uc778 <strong>\ud63c\ud569 \ubaa8\ud615(Mixture Models)<\/strong>\uc5d0 \ub300\ud574 \uae4a\uc774 \uc788\uac8c \ub2e4\ub8e8\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p>\uacfc\uac70 \uc544\ub9ac\uc2a4\ud1a0\ud154\ub808\uc2a4 \uc2dc\ub300\ubd80\ud130 \uacfc\ud559\uc758 \uae30\ucd08\ub294 \uc0ac\ubb3c\uc744 \uc720\uc0ac\uc131\uc5d0 \ub530\ub77c \ubd84\ub958\ud558\ub294 \uac83\uc774\uc5c8\uc2b5\ub2c8\ub2e4. \uad50\uc721 \ud604\uc7a5\uc5d0\uc11c\ub3c4 \uc6b0\ub9ac\ub294 \ud559\uc0dd\ub4e4\uc744 \ub2e8\uc21c\ud788 &#8216;\uc804\uccb4 \ud3c9\uade0&#8217;\uc73c\ub85c \ubcf4\ub294 \uac83\uc774 \uc544\ub2c8\ub77c, \uc11c\ub85c \ub2e4\ub978 \ud559\uc2b5 \uc591\uc2dd\uc774\ub098 \uc2ec\ub9ac\uc801 \ud2b9\uc131\uc744 \uac00\uc9c4 \uc5ec\ub7ec \uc7a0\uc7ac\uc801 \uc9d1\ub2e8(Latent Groups)\uc73c\ub85c \uc774\ud574\ud560 \ud544\uc694\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. \ud63c\ud569 \ubaa8\ud615\uc758 \uac1c\ub150\uacfc \uae30\ucd08<\/h2>\n\n\n\n<p>\ud63c\ud569 \ubaa8\ud615\uc740 \ub370\uc774\ud130\uac00 \uc5ec\ub7ec \uac1c\uc758 \ud558\uc704 \ubd84\ud3ec(Components)\uac00 \ud569\uccd0\uc9c4 \ud615\ud0dc\ub77c\uace0 \uac00\uc815\ud558\ub294 \ud1b5\uacc4\uc801 \uc811\uadfc\ubc95\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.1. \uc65c \ud63c\ud569 \ubaa8\ud615\uc778\uac00?<\/h3>\n\n\n\n<p>\uc804\ud1b5\uc801\uc778 \uad70\uc9d1 \ubd84\uc11d(K-means \ub4f1)\uc740 \ud559\uc0dd\uc744 \ud2b9\uc815 \uc9d1\ub2e8\uc5d0 &#8216;\ub531&#8217; \uc798\ub77c \ubc30\uc815\ud569\ub2c8\ub2e4(Crisp membership). \ubc18\uba74, \ud63c\ud569 \ubaa8\ud615\uc740 <strong>\ud655\ub960\uc801 \uc18c\uc18d(Probabilistic membership)<\/strong>\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud55c \ud559\uc0dd\uc774 &#8216;\uc790\uae30\uc8fc\ub3c4\ud615&#8217; \uc9d1\ub2e8\uc5d0 \uc18d\ud560 \ud655\ub960\uc774 85%, &#8216;\uad50\uc0ac\uc758\uc874\ud615&#8217; \uc9d1\ub2e8\uc5d0 \uc18d\ud560 \ud655\ub960\uc774 15%\ub77c\uace0 \uc54c\ub824\uc8fc\ub294 \uc2dd\uc774\uc8e0. \uc774\ub294 \ubd84\ub958\uc758 \ubd88\ud655\uc2e4\uc131\uc744 \uacfc\ud559\uc801\uc73c\ub85c \ub2e4\ub8f0 \uc218 \uc788\uac8c \ud574\uc90d\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1.2. \uc8fc\uc694 \ubaa8\ub378\uc758 \uc720\ud615<\/h3>\n\n\n\n<p>\uc2ec\ub9ac\ud559\uacfc \uad50\uc721\ud559\uc5d0\uc11c \uac00\uc7a5 \ub9ce\uc774 \uc4f0\uc774\ub294 \ud615\ud0dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc7a0\uc7ac \ud504\ub85c\ud30c\uc77c \ubd84\uc11d (LPA):<\/strong> \uc5f0\uc18d\ud615 \ubcc0\uc218(\uc608: \uc2dc\ud5d8 \uc810\uc218, \uc790\uc544\uc874\uc911\uac10 \ucc99\ub3c4)\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc9d1\ub2e8\uc744 \uad6c\ubd84\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc7a0\uc7ac \uacc4\uce35 \ubd84\uc11d (LCA):<\/strong> \ubc94\uc8fc\ud615\/\uc774\ubd84\ud615 \ubcc0\uc218(\uc608: \uc608\/\uc544\ub2c8\uc624 \uc124\ubb38 \uc751\ub2f5)\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc9d1\ub2e8\uc744 \uad6c\ubd84\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">2. \ubaa8\ud615\uc758 \ucd94\uc815\uacfc \uc758\uc0ac\uacb0\uc815<\/h2>\n\n\n\n<p>\ud63c\ud569 \ubaa8\ud615\uc744 \uc131\uacf5\uc801\uc73c\ub85c \uad6c\ud604\ud558\uae30 \uc704\ud574\uc11c\ub294 \uba87 \uac00\uc9c0 \uc911\uc694\ud55c \ud1b5\uacc4\uc801 \uacb0\uc815\uc744 \ub0b4\ub824\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.1. EM \uc54c\uace0\ub9ac\uc998\uacfc \uc9c0\uc5ed \ucd5c\uc801\ud574(Local Optima)<\/h3>\n\n\n\n<p>\ud63c\ud569 \ubaa8\ud615\uc740 \ubcf4\ud1b5 <strong>EM(Expectation-Maximization) \uc54c\uace0\ub9ac\uc998<\/strong>\uc744 \ud1b5\ud574 \ucd94\uc815\ub429\ub2c8\ub2e4. \uc774 \uacfc\uc815\uc5d0\uc11c \uc8fc\uc758\ud560 \uc810\uc740 &#8216;\uac00\uc7a5 \uc88b\uc740 \ud574&#8217;\ub77c\uace0 \uc0dd\uac01\ud55c \uacb0\uacfc\uac00 \uc0ac\uc2e4\uc740 \ud2b9\uc815 \uc870\uac74\uc5d0\uc11c\ub9cc \ub098\ud0c0\ub098\ub294 <strong>\uc9c0\uc5ed \ucd5c\uc801\ud574(Local Optima)<\/strong>\uc77c \uc218 \uc788\ub2e4\ub294 \uc810\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>WaurimaL\uc758 \ud301:<\/strong> \uc774\ub97c \ubc29\uc9c0\ud558\uae30 \uc704\ud574 <strong>\ubb34\uc791\uc704 \uc2dc\uc791\uac12(Random Starts)<\/strong>\uc744 \ucda9\ubd84\ud788(\uc608: 1,000 ~ 5,000\uac1c) \uc124\uc815\ud558\ub294 \uac83\uc774 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc2dc\uc791\uac12\uc774 \uc801\uc73c\uba74 \ub370\uc774\ud130\uc758 \uc2e4\uc81c \uad6c\uc870\ub97c \ub193\uce60 \uc704\ud5d8\uc774 \ud07d\ub2c8\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">2.2. \uacf5\ubd84\uc0b0 \uad6c\uc870\uc758 \uacb0\uc815<\/h3>\n\n\n\n<p>\ub370\uc774\ud130\uc758 \ud615\ud0dc(\ubd80\ud53c, \ubaa8\uc591, \ubc29\ud5a5)\ub97c \uc5b4\ub5bb\uac8c \uac00\uc815\ud558\ub290\ub0d0\uc5d0 \ub530\ub77c 14\uac00\uc9c0 \uc774\uc0c1\uc758 \ubaa8\ub378\uc774 \uc874\uc7ac\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\ubaa8\ub378 \uc720\ud615<\/strong><\/td><td><strong>\ubd80\ud53c (Volume)<\/strong><\/td><td><strong>\ubaa8\uc591 (Shape)<\/strong><\/td><td><strong>\ubc29\ud5a5 (Orientation)<\/strong><\/td><td><strong>\ud2b9\uc9d5<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>EII<\/strong><\/td><td>\ub3d9\uc77c<\/td><td>\uad6c\ud615<\/td><td>\ud574\ub2f9 \uc5c6\uc74c<\/td><td>\uac00\uc7a5 \uc81c\uc57d\uc774 \ub9ce\uc740 \ud615\ud0dc (K-means\uc640 \uc720\uc0ac) <\/td><\/tr><tr><td><strong>VII<\/strong><\/td><td>\uac00\ubcc0<\/td><td>\uad6c\ud615<\/td><td>\ud574\ub2f9 \uc5c6\uc74c<\/td><td>\uc9d1\ub2e8\ubcc4 \ud06c\uae30\ub294 \ub2e4\ub974\uc9c0\ub9cc \ubaa8\uc591\uc740 \ub3d9\uadf8\ub77c\ubbf8<\/td><\/tr><tr><td><strong>VVV<\/strong><\/td><td>\uac00\ubcc0<\/td><td>\uac00\ubcc0<\/td><td>\uac00\ubcc0<\/td><td>\uac00\uc7a5 \uc720\uc5f0\ud558\uba70 \ub370\uc774\ud130\uc5d0 \ucd5c\uc801\ud654\ub428<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">2.3. \uc9d1\ub2e8 \uc218 \uc120\uc815 (BIC\uc640 ICL)<\/h3>\n\n\n\n<p>&#8220;\uc6b0\ub9ac \ubc18 \ud559\uc0dd\ub4e4\uc740 \uba87 \uac1c\uc758 \uc720\ud615\uc73c\ub85c \ub098\ub258\ub294\uac00?&#8221;\ub97c \uacb0\uc815\ud560 \ub54c \uac00\uc7a5 \ub110\ub9ac \uc4f0\uc774\ub294 \uc9c0\ud45c\ub294 <strong>BIC(Bayesian Information Criterion)<\/strong>\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c BIC \uac12\uc774 \uac00\uc7a5 \uc791\uc740 \ubaa8\ub378\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4. \ub9cc\uc57d \uc9d1\ub2e8 \uac04 \uad6c\ubd84\uc774 \uba85\ud655\ud55c \ubaa8\ub378\uc744 \uc6d0\ud55c\ub2e4\uba74 <strong>ICL(Integrated Completed Likelihood)<\/strong> \uc9c0\ud45c\ub97c \ud568\uaed8 \uace0\ub824\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. \uad50\uc721 \ud604\uc7a5\uc758 \uc0ac\ub840: &#8220;\ud559\uc2b5 \ub3d9\uae30 \ud504\ub85c\ud30c\uc77c \ubd84\uc11d&#8221;<\/h2>\n\n\n\n<p>\uc774\ud574\ub97c \ub3d5\uae30 \uc704\ud574 \uac00\uc0c1\uc758 \uace0\ub4f1\ud559\uc0dd 200\uba85\uc758 \ub370\uc774\ud130\ub97c \uc0dd\uc131\ud558\uc5ec \ubd84\uc11d\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1. \ubaa8\uc758 \ub370\uc774\ud130 \uc2dc\ub098\ub9ac\uc624<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ubcc0\uc218:<\/strong> \ub0b4\uc7ac\uc801 \ub3d9\uae30(IM), \uc678\uc7ac\uc801 \ub3d9\uae30(EM), \ud559\uc2b5 \ubd88\uc548(ANX), \uc790\uae30\ud6a8\ub2a5\uac10(SE)<\/li>\n\n\n\n<li>\uc7a0\uc7ac\ub41c \uc2a4\ud1a0\ub9ac: 1. \uace0\ub3d9\uae30\ud615: \ubaa8\ub4e0 \uc810\uc218\uac00 \ub192\uc74c. 2. \ubd88\uc548\ud615: \ub3d9\uae30\ub294 \uc788\uc73c\ub098 \ubd88\uc548\ub3c4\uac00 \ub9e4\uc6b0 \ub192\uc74c. 3. \ubb34\uae30\ub825\ud615: \ubaa8\ub4e0 \uc810\uc218\uac00 \uc804\ubc18\uc801\uc73c\ub85c \ub0ae\uc74c.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.2. R\uc744 \uc774\uc6a9\ud55c \ubd84\uc11d \ucf54\ub4dc<\/h3>\n\n\n\n<p>Jamovi\uc758 <code>snowRMM<\/code> \ubaa8\ub4c8\ub85c\ub3c4 \uac00\ub2a5\ud558\uc9c0\ub9cc, \ubcf4\ub2e4 \uc815\ubc00\ud55c \uc81c\uc5b4\ub97c \uc704\ud574 R\uc758 <code>mclust<\/code> \ud639\uc740 <code>mixture<\/code> \ud328\ud0a4\uc9c0\ub97c \uad8c\uc7a5\ud569\ub2c8\ub2e4. <\/p>\n\n\n\n<p>R<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \ud544\uc694\ud55c \ud328\ud0a4\uc9c0 \ub85c\ub4dc\nlibrary(mclust)\nlibrary(tidyverse)\n\n# 1. \ubaa8\uc758 \ub370\uc774\ud130 \uc0dd\uc131 (\uad50\uc218 \uc7ac\ub7c9)\nset.seed(2026)\nn &lt;- 200\n# \uc138 \uac1c\uc758 \uc9d1\ub2e8 \uc0dd\uc131 (\uace0\ub3d9\uae30, \ubd88\uc548, \ubb34\uae30\ub825)\ng1 &lt;- matrix(rnorm(n*0.4*4, mean=4, sd=0.5), ncol=4) # \uace0\ub3d9\uae30\ng2 &lt;- matrix(rnorm(n*0.3*4, mean=c(3,4,4,3), sd=0.6), ncol=4) # \ubd88\uc548\ud615\ng3 &lt;- matrix(rnorm(n*0.3*4, mean=2, sd=0.7), ncol=4) # \ubb34\uae30\ub825\ndata &lt;- rbind(g1, g2, g3)\ncolnames(data) &lt;- c(\"IM\", \"EM\", \"ANX\", \"SE\")\n\nwrite.csv(data,\"chap29.csv\",row.names = F)\n\n# 2. \ud63c\ud569 \ubaa8\ud615 \uc801\ud569 (\uc9d1\ub2e8 \uc218 1~5\uac1c \ud14c\uc2a4\ud2b8)\nfit &lt;- Mclust(data, G=1:5)\n\n# 3. \uacb0\uacfc \uc694\uc57d \ubc0f \uc9d1\ub2e8 \uc218 \ud655\uc778\nsummary(fit) \n# \ucd5c\uc801 \ubaa8\ub378\uacfc \uc9d1\ub2e8 \uc218(G) \ucd9c\ub825\n\n# 4. \uc2dc\uac01\ud654: \ud504\ub85c\ud30c\uc77c \ud50c\ub86f\nmeans &lt;- fit$parameters$mean\nmatplot(means, type=\"b\", pch=1:fit$G, main=\"Student Learning Profiles\")\n\n# 5. \ubaa8\ud615 \uc801\ud569 (\uc608: mclust \uc0ac\uc6a9)\nfit1 &lt;- Mclust(data, G=3)\n\n# 6. 1\ubc88 \uc9d1\ub2e8 80\uac1c, 2\ubc88 \uc9d1\ub2e8 60\uac1c, 3\ubc88 \uc9d1\ub2e8 60\uac1c\ub97c \ud558\ub098\uc758 \ubca1\ud130\ub85c \ub9cc\ub4ed\ub2c8\ub2e4.\nactual_classes &lt;- c(rep(1, 80), rep(2, 60), rep(3, 60))\n\n# 7. \uc608\uce21\ub41c \uc9d1\ub2e8 \ud560\ub2f9 (MAP \ubd84\ub958)\n# \uac01 \uad00\uce21\uce58\ub97c \uac00\uc7a5 \ub192\uc740 \uc0ac\ud6c4 \ud655\ub960\uc744 \uac00\uc9c4 \uc9d1\ub2e8\uc5d0 \ud560\ub2f9\ud569\ub2c8\ub2e4.\npredicted_classes &lt;- fit1$classification\n\n# 8. \uc2e4\uc81c \uc9d1\ub2e8 \uc815\ubcf4\uc640 \ube44\uad50\ud558\uc5ec ARI \uacc4\uc0b0\n# actual_classes\ub294 \ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ud3ec\ud568\ub41c \uc2e4\uc81c \uc9d1\ub2e8 \ub808\uc774\ube14\uc785\ub2c8\ub2e4.\nfinal_ari &lt;- adjustedRandIndex(actual_classes, predicted_classes)\n\n# 9. \uacb0\uacfc \ud574\uc11d\n# \uacb0\uacfc \ucd9c\ub825\ncat(\"\ubd84\uc11d \uacb0\uacfc ARI \uc218\uce58:\", final_ari, \"\\n\")\n<\/code><\/pre>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-2b97e7c4-fb29-42e5-9f75-5ba7aeb836d1\" href=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/chap29.csv\">chap29<\/a><a href=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/chap29.csv\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-2b97e7c4-fb29-42e5-9f75-5ba7aeb836d1\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"401\" height=\"540\" src=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/fig29-1.png\" alt=\"\" class=\"wp-image-638\" srcset=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/fig29-1.png 401w, http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/fig29-1-223x300.png 223w\" sizes=\"auto, (max-width: 401px) 100vw, 401px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4. \ubd84\uc11d \uacb0\uacfc\uc758 \ud574\uc11d\uacfc \uc8fc\uc758\uc0ac\ud56d<\/h2>\n\n\n\n<p>\ubd84\uc11d\uc774 \ub05d\ub0ac\ub2e4\uace0 \ud574\uc11c \ubc14\ub85c &#8220;\uc6b0\ub9ac \ud559\uc0dd\ub4e4\uc740 3\uac1c \uc9d1\ub2e8\uc774\ub2e4!&#8221;\ub77c\uace0 \uacb0\ub860\uc9c0\uc5b4\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1. \uc9c1\uc811\uc801 vs \uac04\uc811\uc801 \uc801\uc6a9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc9c1\uc811\uc801 \uc801\uc6a9:<\/strong> \uc2e4\uc81c\ub85c \ub370\uc774\ud130 \uc548\uc5d0 \uc9c8\uc801\uc73c\ub85c \ub2e4\ub978 &#8216;\uc9c4\uc9dc \uc9d1\ub2e8&#8217;\uc774 \uc874\uc7ac\ud55c\ub2e4\uace0 \ubbff\ub294 \uacbd\uc6b0\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uac04\uc811\uc801 \uc801\uc6a9:<\/strong> \ub370\uc774\ud130\uac00 \ub2e8\uc21c\ud788 \ube44\uc815\uaddc\ubd84\ud3ec(\uae30\uc6b8\uc5b4\uc9d0 \ub4f1)\ub97c \ub760\uace0 \uc788\uc5b4\uc11c, \uc774\ub97c \uc124\uba85\ud558\uae30 \uc704\ud574 \uc5ec\ub7ec \uac1c\uc758 \uc815\uaddc\ubd84\ud3ec\ub97c \ube4c\ub824 \uc4f0\ub294 \uacbd\uc6b0\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p>\ub300\ubd80\ubd84\uc758 \uc0ac\ud68c\uacfc\ud559 \ub370\uc774\ud130\ub294 \ud6c4\uc790\uc778 \uacbd\uc6b0\uac00 \ub9ce\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c &#8216;\uc9d1\ub2e8 \ubd84\ub958&#8217; \uc790\uccb4\uc5d0 \ub9e4\ubab0\ub418\uae30\ubcf4\ub2e4\ub294, <strong>\uc804\uccb4\uc801\uc778 \ub370\uc774\ud130\uc758 \uc774\uc9c8\uc131\uc744 \uc774\ud574\ud558\ub294 \uc218\ub2e8<\/strong>\uc73c\ub85c \ud63c\ud569 \ubaa8\ud615\uc744 \ud65c\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.2. \ubd84\ub958 \uc815\ud655\ub3c4 (ARI)<\/h3>\n\n\n\n<p>\ubd84\uc11d \uacb0\uacfc\ub85c \ub098\uc628 \uc9d1\ub2e8 \ubd84\ub958\uac00 \uc5bc\ub9c8\ub098 \uc815\ud655\ud55c\uc9c0 \ud310\ub2e8\ud558\uae30 \uc704\ud574 <strong>ARI(Adjusted Rand Index)<\/strong>\ub97c \ud655\uc778\ud569\ub2c8\ub2e4. ARI\uac00 0.8 \uc774\uc0c1\uc774\uba74 &#8216;\uc6b0\uc218&#8217;, 0.65 \uc774\uc0c1\uc774\uba74 &#8216;\uc218\uc6a9 \uac00\ub2a5&#8217;\ud55c \uc218\uc900\uc73c\ub85c \ubd05\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. \uacb0\ub860: \uc5f0\uad6c\uc790\ub97c \uc704\ud55c \uc81c\uc5b8<\/h2>\n\n\n\n<p>\ud63c\ud569 \ubaa8\ud615\uc740 \ub9e4\uc6b0 \uc720\uc5f0\ud558\uc9c0\ub9cc, \uadf8\ub9cc\ud07c \uc624\uc6a9\ud558\uae30 \uc27d\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\uc2dc\uac01\ud654\uac00 \uc6b0\uc120\uc785\ub2c8\ub2e4:<\/strong> \ubd84\uc11d \uc804 \uc0b0\uc810\ub3c4\ub098 \uc694\uc778 \uc810\uc218 \ubd84\ud3ec\ub97c \ud1b5\ud574 \uc2e4\uc81c\ub85c \uc9d1\ub2e8\uc774 \ub098\ub260 \ub9cc\ud55c \uad6c\uc870\uc778\uc9c0 \uba3c\uc800 \ud655\uc778\ud558\uc138\uc694. <\/li>\n\n\n\n<li><strong>\uc774\ub860\uc801 \uadfc\uac70\ub97c \uac00\uc9c0\uc138\uc694:<\/strong> \ud1b5\uacc4 \uc9c0\ud45c(BIC)\uac00 4\uac1c\ub97c \ucd94\ucc9c\ud558\ub354\ub77c\ub3c4, \uad50\uc721\ud559\uc801 \uc774\ub860\uc73c\ub85c \uc124\uba85\ub418\uc9c0 \uc54a\ub294 \uc9d1\ub2e8\uc774\ub77c\uba74 \ubaa8\ud615\uc744 \uc7ac\uac80\ud1a0\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ubcf5\uc81c \uac00\ub2a5\uc131\uc744 \uc5fc\ub450\uc5d0 \ub450\uc138\uc694:<\/strong> \ud63c\ud569 \ubaa8\ud615\uc740 \uacfc\uc801\ud569(Overfitting)\uc758 \uc704\ud5d8\uc774 \ud06c\ubbc0\ub85c, \ub2e4\ub978 \uc0d8\ud50c\uc5d0\uc11c\ub3c4 \ub3d9\uc77c\ud55c \uad6c\uc870\uac00 \ub098\ud0c0\ub098\ub294\uc9c0 \ud655\uc778\ud558\ub294 \uacfc\uc815\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\ucc38\uace0\ubb38\ud5cc (APA Style)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bauer, D. J., &amp; Curran, P. J. (2003). Distributional assumptions of growth mixture models: Implications for overextraction of latent trajectory classes. <em>Psychological Methods<\/em>, 8(3), 338\u2013363.<\/li>\n\n\n\n<li>Celeux, G., &amp; Govaert, G. (1995). Gaussian parsimonious clustering models. <em>Pattern Recognition<\/em>, 28(5), 781\u2013793.<\/li>\n\n\n\n<li>Dempster, A. P., Laird, N. M., &amp; Rubin, D. B. (1977). Maximum likelihood from incomplete data via the EM algorithm. <em>Journal of the Royal Statistical Society: Series B (Methodological)<\/em>, 39(1), 1\u201322.<\/li>\n\n\n\n<li>McLachlan, G. J., &amp; Peel, D. (2000). <em>Finite mixture models<\/em>. Wiley.<\/li>\n\n\n\n<li>Steinley, D. (2026). Mixture Models. In <em>The SAGE Handbook of Quantitative Methods in Psychology<\/em>. SAGE. (Original work published 2023)<\/li>\n\n\n\n<li>Steinley, D., &amp; Brusco, M. J. (2011). Evaluating the performance of model-based clustering: Recommendations and cautions. <em>Psychological Methods<\/em>, 16(1), 63\u201379.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc548\ub155\ud558\uc138\uc694?\uc774\ubc88\uc5d0\ub294 \uad50\uc721 \uc5f0\uad6c\uc5d0\uc11c \uc9d1\ub2e8\uc758 \uc774\uc9c8\uc131\uc744 \ud30c\uc545\ud558\ub294 \uc544\uc8fc \uac15\ub825\ud55c \ub3c4\uad6c\uc778 \ud63c\ud569 \ubaa8\ud615(Mixture Models)\uc5d0 \ub300\ud574 \uae4a\uc774 \uc788\uac8c \ub2e4\ub8e8\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uacfc\uac70 \uc544\ub9ac\uc2a4\ud1a0\ud154\ub808\uc2a4 \uc2dc\ub300\ubd80\ud130 \uacfc\ud559\uc758 \uae30\ucd08\ub294 \uc0ac\ubb3c\uc744 \uc720\uc0ac\uc131\uc5d0 \ub530\ub77c \ubd84\ub958\ud558\ub294 \uac83\uc774\uc5c8\uc2b5\ub2c8\ub2e4. \uad50\uc721 \ud604\uc7a5\uc5d0\uc11c\ub3c4 \uc6b0\ub9ac\ub294 \ud559\uc0dd\ub4e4\uc744 \ub2e8\uc21c\ud788 &#8216;\uc804\uccb4 \ud3c9\uade0&#8217;\uc73c\ub85c \ubcf4\ub294 \uac83\uc774 \uc544\ub2c8\ub77c, \uc11c\ub85c \ub2e4\ub978 \ud559\uc2b5 \uc591\uc2dd\uc774\ub098 \uc2ec\ub9ac\uc801 \ud2b9\uc131\uc744 \uac00\uc9c4 \uc5ec\ub7ec \uc7a0\uc7ac\uc801 \uc9d1\ub2e8(Latent Groups)\uc73c\ub85c \uc774\ud574\ud560 \ud544\uc694\uac00 \uc788\uc2b5\ub2c8\ub2e4. 1. \ud63c\ud569 \ubaa8\ud615\uc758 \uac1c\ub150\uacfc <a class=\"read-more\" href=\"http:\/\/waurimal.kr\/?p=636\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[300],"tags":[398,199,166,301,360],"class_list":["post-636","post","type-post","status-publish","format-standard","hentry","category-sem","tag-mixture-models","tag-r","tag-sem","tag-301","tag-360"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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