{"id":738,"date":"2026-01-20T09:54:22","date_gmt":"2026-01-20T00:54:22","guid":{"rendered":"http:\/\/waurimal.kr\/?p=738"},"modified":"2026-01-20T10:03:28","modified_gmt":"2026-01-20T01:03:28","slug":"chap07-%eb%8b%a4%ec%b8%b5%eb%aa%a8%ed%98%95%ec%97%90%ec%84%9c%ec%9d%98-%eb%aa%a8%ed%98%95-%ec%84%a0%ed%83%9d","status":"publish","type":"post","link":"http:\/\/waurimal.kr\/?p=738","title":{"rendered":"Chap07. \ub2e4\uce35\ubaa8\ud615\uc5d0\uc11c\uc758 \ubaa8\ud615 \uc120\ud0dd"},"content":{"rendered":"\n<p>\uc548\ub155\ud558\uc138\uc694!<\/p>\n\n\n\n<p>\uc624\ub298\uc740 <strong>&#8220;\ub2e4\uce35\ubaa8\ud615(Multilevel Model)\uc5d0\uc11c\uc758 \ubaa8\ud615 \uc120\ud0dd(Model Selection)&#8221;<\/strong>\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \u201c\ud559\uad50 \ud604\uc7a5\uc758 \ub370\uc774\ud130\u201d\ub97c \uc608\uc2dc\ub85c \ub4e4\uc5b4 \uc9c1\uad00\uc801\uc778 \uc124\uba85\uacfc \uc218\ub9ac\uc801 \uc5c4\ubc00\ud568\uc744 \ubaa8\ub450 \uac16\ucd98 \ud615\ud0dc\ub85c \uc7ac\uad6c\uc131\ud574 \ub4dc\ub9ac\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p>\ubd84\uc11d \ub3c4\uad6c\ub85c\ub294 <strong>jamovi<\/strong>\uc758 \uc0ac\uc6a9\ubc95\uc744 \uc124\uba85\ud558\ub418, jamovi\uc758 \uae30\ubc18\uc774 \ub418\ub294 <strong>R \ucf54\ub4dc<\/strong>\ub97c \ud568\uaed8 \uc81c\uc2dc\ud558\uc5ec \ubaa8\uc758 \ub370\uc774\ud130 \uc0dd\uc131\ubd80\ud130 \ubd84\uc11d, \uc2dc\uac01\ud654\uae4c\uc9c0 \uc644\ubcbd\ud558\uac8c \uad6c\ud604\ud574 \ub4dc\ub9ac\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. \uc11c\ub860: \uc644\ubcbd\ud55c \uc637\uc744 \uace0\ub974\ub294 \ubc95 (\ubaa8\ud615 \uc120\ud0dd\uc758 \ub51c\ub808\ub9c8)<\/h2>\n\n\n\n<p>\uc5ec\ub7ec\ubd84\uc774 \ubc31\ud654\uc810\uc5d0\uc11c \uc637\uc744 \uace0\ub978\ub2e4\uace0 \uc0c1\uc0c1\ud574 \ubcf4\uc138\uc694. \ub108\ubb34 \ud070 \uc637\uc740 \ud5d0\ub801\ud574\uc11c \ubcf4\uae30\uac00 \uc2eb\uace0(\uacfc\uc18c\uc801\ud569, underfitting), \ub108\ubb34 \uaf49 \ub07c\ub294 \uc637\uc740 \uc228\uc26c\uae30\uac00 \ud798\ub4ed\ub2c8\ub2e4(\uacfc\uc801\ud569, overfitting). \ud1b5\uacc4 \ubaa8\ud615\uc744 \uc120\ud0dd\ud558\ub294 \uac83\ub3c4 \uc774\uc640 \uac19\uc2b5\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 \ub370\uc774\ud130\ub97c \uac00\uc7a5 \uc798 \uc124\uba85\ud558\uba74\uc11c\ub3c4, \ubd88\ud544\uc694\ud558\uac8c \ubcf5\uc7a1\ud558\uc9c0 \uc54a\uc740 <strong>&#8216;\ucd5c\uc801\uc758 \ubaa8\ud615&#8217;<\/strong>\uc744 \ucc3e\uc544\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p>\uc77c\ubc18\uc801\uc778 \ud68c\uadc0\ubd84\uc11d(OLS)\uc5d0\uc11c\ub294 <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\ub098 \uc218\uc815\ub41c <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math> \uac19\uc740 \uba85\ud655\ud55c \uae30\uc900\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc <strong>\ub2e4\uce35\ubaa8\ud615(MLM)<\/strong>\uc73c\ub85c \ub118\uc5b4\uc624\uba74 \uc0c1\ud669\uc774 \ud6e8\uc52c \ubcf5\uc7a1\ud574\uc9d1\ub2c8\ub2e4. \ub370\uc774\ud130\uac00 \uc5ec\ub7ec \uce35\uc704(\uc608: \ud559\uc0dd-\ud559\uae09-\ud559\uad50)\ub85c \uaf2c\uc5ec \uc788\uae30 \ub54c\ubb38\uc5d0 &#8220;\uc124\uba85\ub825&#8221;\uc744 \uc815\uc758\ud558\ub294 \ubc29\uc2dd\ub3c4 \ub2ec\ub77c\uc9c0\uace0, \ubaa8\ud615\uc758 \uc801\ud569\ub3c4\ub97c \ud310\ub2e8\ud558\ub294 \uae30\uc900(AIC, BIC \ub4f1)\ub3c4 \uc5b4\ub5a4 &#8216;\uc6b0\ub3c4(Likelihood)&#8217;\ub97c \uc4f0\ub290\ub0d0\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p>\uc774 \uae00\uc5d0\uc11c\ub294 Russell Steele \uad50\uc218\uc758 \ub17c\uc758\ub97c \ubc14\ud0d5\uc73c\ub85c, \ud559\uad50 \ub370\uc774\ud130\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc774 \ubcf5\uc7a1\ud55c \uae30\uc900\ub4e4\uc744 \uba85\ucf8c\ud558\uac8c \uc815\ub9ac\ud574 \ub4dc\ub9ac\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. \uc608\uc81c \ub370\uc774\ud130 \uc0dd\uc131: &#8220;\ud587\uc0b4\ucd08\ub4f1\ud559\uad50\uc758 \uc218\ud559 \uc131\ucde8\ub3c4&#8221;<\/h2>\n\n\n\n<p>\uc774\ub860\ub9cc \ub4e4\uc73c\uba74 \uc9c0\ub8e8\ud558\ub2c8, \uac00\uc0c1\uc758 \uc2dc\ub098\ub9ac\uc624\ub97c \ub9cc\ub4e4\uc5b4 \ubd05\uc2dc\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 \uc2dc\ub098\ub9ac\uc624<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc5f0\uad6c \ub300\uc0c1:<\/strong> \ud587\uc0b4\ucd08\ub4f1\ud559\uad50 6\ud559\ub144 \ud559\uc0dd 1,000\uba85 (50\uac1c \ud559\uae09).<\/li>\n\n\n\n<li><strong>\uc885\uc18d \ubcc0\uc218(<\/strong><math data-latex=\"Y\"><semantics><mi>Y<\/mi><annotation encoding=\"application\/x-tex\">Y<\/annotation><\/semantics><\/math><strong>):<\/strong> \uc218\ud559 \uc131\ucde8\ub3c4 (Math Score).<\/li>\n\n\n\n<li><strong>1\uc218\uc900 \ubcc0\uc218(\ud559\uc0dd):<\/strong> \uc0ac\uad50\uc721 \uc2dc\uac04 (Private Education, <math data-latex=\"X\"><semantics><mi>X<\/mi><annotation encoding=\"application\/x-tex\">X<\/annotation><\/semantics><\/math>).<\/li>\n\n\n\n<li><strong>2\uc218\uc900 \ubcc0\uc218(\ud559\uae09):<\/strong> \ub2f4\uc784 \uc120\uc0dd\ub2d8\uc758 \uc5f4\uc815 (Teacher Passion, <math data-latex=\"Z\"><semantics><mi>Z<\/mi><annotation encoding=\"application\/x-tex\">Z<\/annotation><\/semantics><\/math>).<\/li>\n\n\n\n<li><strong>\uac00\uc124:<\/strong> \uc0ac\uad50\uc721 \uc2dc\uac04\uc774 \uae38\uc218\ub85d \uc218\ud559 \uc810\uc218\uac00 \ub192\uc744 \uac83\uc774\uba70, \uc774 \uad00\uacc4\ub294 \ub2f4\uc784 \uc120\uc0dd\ub2d8\uc758 \uc5f4\uc815\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c8 \uac83\uc774\ub2e4(\uad50\ucc28 \uc218\uc900 \uc0c1\ud638\uc791\uc6a9).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 R\uc744 \uc774\uc6a9\ud55c \ubaa8\uc758 \ub370\uc774\ud130 \uc0dd\uc131 (jamovi\uc758 Rj Editor\uc5d0\uc11c\ub3c4 \uc2e4\ud589 \uac00\ub2a5)<\/h3>\n\n\n\n<p>R<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>set.seed(1234)\n\n# 1. \ud30c\ub77c\ubbf8\ud130 \uc124\uc815\nn_classes &lt;- 50          # \ud559\uae09 \uc218 (J)\nn_students_per_class &lt;- 20 # \ud559\uae09\ub2f9 \ud559\uc0dd \uc218 (n)\nN &lt;- n_classes * n_students_per_class\n\n# 2. 2\uc218\uc900(\ud559\uae09) \ubcc0\uc218 \uc0dd\uc131\nclass_id &lt;- rep(1:n_classes, each = n_students_per_class)\nteacher_passion &lt;- rnorm(n_classes, mean = 50, sd = 10) # \uad50\uc0ac \uc5f4\uc815\nu0 &lt;- rnorm(n_classes, 0, 5) # \uc808\ud3b8\uc5d0 \ub300\ud55c \ub79c\ub364 \ud6a8\uacfc (\ud559\uad50 \uac04 \ucc28\uc774)\nu1 &lt;- rnorm(n_classes, 0, 2) # \uae30\uc6b8\uae30\uc5d0 \ub300\ud55c \ub79c\ub364 \ud6a8\uacfc (\ud6a8\uacfc\uc758 \ucc28\uc774)\n\n# 3. 1\uc218\uc900(\ud559\uc0dd) \ubcc0\uc218 \uc0dd\uc131\nprivate_edu &lt;- rnorm(N, mean = 5, sd = 2) # \uc0ac\uad50\uc721 \uc2dc\uac04\nerror &lt;- rnorm(N, 0, 5) # \uc794\ucc28\n\n# 4. \ub370\uc774\ud130 \ud504\ub808\uc784 \uc0dd\uc131 (\uacc4\uce35\uc801 \uad6c\uc870 \ubc18\uc601)\n# \uc218\uc2dd: Math = (50 + u0) + (2 + 0.1*Passion + u1)*Private + error\n# \uad50\uc0ac \uc5f4\uc815\uc774 \ub192\uc73c\uba74 \uc0ac\uad50\uc721\uc758 \ud6a8\uacfc\uac00 \ub354 \ucee4\uc9c4\ub2e4\uace0 \uac00\uc815 (\uc0c1\ud638\uc791\uc6a9)\nintercept &lt;- 40 + u0&#91;class_id]\nslope &lt;- 2 + 0.1 * (teacher_passion&#91;class_id] - 50) + u1&#91;class_id] \nmath_score &lt;- intercept + slope * private_edu + error\n\ndata &lt;- data.frame(\n  ClassID = factor(class_id),\n  StudentID = 1:N,\n  MathScore = math_score,\n  PrivateEdu = private_edu,\n  TeacherPassion = rep(teacher_passion, each = n_students_per_class)\n)\n\nhead(data)\n\n# CSV\ub85c \uc800\uc7a5 (jamovi\uc5d0\uc11c \ubd88\ub7ec\uc624\uae30 \uc704\ud568)\nwrite.csv(data, \"chap07.csv\", row.names = FALSE)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-0f90badf-bd40-4ed2-bbe7-d54c5e63b943\" href=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/chap07.csv\">chap07<\/a><a href=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/chap07.csv\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-0f90badf-bd40-4ed2-bbe7-d54c5e63b943\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">3. \ub2e4\uce35\ubaa8\ud615\uc5d0\uc11c\uc758 <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>: \uc124\uba85\ub825\uc758 \uc7ac\uc815\uc758<\/h2>\n\n\n\n<p>\uc77c\ubc18 \ud68c\uadc0\ubd84\uc11d\uc5d0\uc11c <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\ub294 &#8220;\uc804\uccb4 \ubcc0\ub3d9 \uc911 \ubaa8\ud615\uc774 \uc124\uba85\ud558\ub294 \ube44\uc728&#8221;\uc785\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ub2e4\uce35\ubaa8\ud615\uc5d0\uc11c\ub294 \ubcc0\ub3d9\uc774 <strong>\ud559\uc0dd \uc218\uc900(Level 1)<\/strong>\uacfc <strong>\ud559\uae09 \uc218\uc900(Level 2)<\/strong>\uc73c\ub85c \ub098\ub269\ub2c8\ub2e4. \ub530\ub77c\uc11c <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\ub3c4 \uc218\uc900\ubcc4\ub85c \ub530\ub85c \uacc4\uc0b0\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Snijders &amp; Bosker (SB) <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math><\/h3>\n\n\n\n<p>Snijders\uc640 Bosker(1994)\ub294 <strong>&#8220;\uc608\uce21 \uc624\ucc28\uc758 \uac10\uc18c(reduction in prediction error)&#8221;<\/strong>\ub77c\ub294 \uad00\uc810\uc5d0\uc11c <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\ub97c \uc815\uc758\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1\uc218\uc900 <\/strong><math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math><strong> (<\/strong><math data-latex=\"R^2_{SB-1}\"><semantics><msubsup><mi>R<\/mi><mrow><mi>S<\/mi><mi>B<\/mi><mo>\u2212<\/mo><mn>1<\/mn><\/mrow><mn>2<\/mn><\/msubsup><annotation encoding=\"application\/x-tex\">R^2_{SB-1}<\/annotation><\/semantics><\/math><strong>):<\/strong> \uac1c\ubcc4 \ud559\uc0dd\uc758 \uc810\uc218\ub97c \uc5bc\ub9c8\ub098 \uc798 \uc608\uce21\ud558\ub294\uac00?\n<ul class=\"wp-block-list\">\n<li>\uacc4\uc0b0\uc2dd\uc5d0\ub294 \uace0\uc815 \ud6a8\uacfc(Fixed effects)\ubfd0\ub9cc \uc544\ub2c8\ub77c \ub79c\ub364 \ud6a8\uacfc(Random effects)\uc758 \ubd84\uc0b0\ub3c4 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\uae30\uc900 \ubaa8\ub378(Null Model)\uc740 \uc544\ubb34\ub7f0 \uc124\uba85 \ubcc0\uc218\uac00 \uc5c6\ub294 \ubaa8\ub378(\uc808\ud3b8\ub9cc \uc788\ub294 \ubaa8\ub378)\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>2\uc218\uc900 <\/strong><math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math><strong> (<\/strong><math data-latex=\"R^2_{SB-2}\"><semantics><msubsup><mi>R<\/mi><mrow><mi>S<\/mi><mi>B<\/mi><mo>\u2212<\/mo><mn>2<\/mn><\/mrow><mn>2<\/mn><\/msubsup><annotation encoding=\"application\/x-tex\">R^2_{SB-2}<\/annotation><\/semantics><\/math><strong>):<\/strong> \ud559\uae09 \ud3c9\uade0 \uc810\uc218\ub97c \uc5bc\ub9c8\ub098 \uc798 \uc608\uce21\ud558\ub294\uac00?\n<ul class=\"wp-block-list\">\n<li>\ud559\uae09 \uc218\uc900\uc758 \uc124\uba85\ub825\uc744 \ubcfc \ub54c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Edwards et al. <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math> (<math data-latex=\"R^2_E\"><semantics><msubsup><mi>R<\/mi><mi>E<\/mi><mn>2<\/mn><\/msubsup><annotation encoding=\"application\/x-tex\">R^2_E<\/annotation><\/semantics><\/math>)<\/h3>\n\n\n\n<p>Edwards \ub4f1(2008)\uc740 <strong>Wald F-\ud1b5\uacc4\ub7c9<\/strong>\uc744 \uc774\uc6a9\ud558\uc5ec <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\ub97c \uacc4\uc0b0\ud558\ub294 \ubc29\uc2dd\uc744 \uc81c\uc548\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774 \ubc29\ubc95\uc740 <strong>\ud2b9\uc815\ud55c \uace0\uc815 \ud6a8\uacfc(Fixed Effect)\uac00 \ucd94\uac00\ub428\uc73c\ub85c\uc368 \uc124\uba85\ub825\uc774 \uc5bc\ub9c8\ub098 \ub298\uc5c8\ub294\uc9c0<\/strong>\ub97c \ubcf4\ub294 \ub370 \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ubd84\ubaa8\uc758 \uc790\uc720\ub3c4\ub97c \uacc4\uc0b0\ud560 \ub54c <strong>Kenward-Roger \uadfc\uc0ac<\/strong>\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uad8c\uc7a5\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>[WaurimaL\uc758 \uc870\uc5b8]<\/p>\n\n\n\n<p><math data-latex=\"R^2_{SB}\"><semantics><msubsup><mi>R<\/mi><mrow><mi>S<\/mi><mi>B<\/mi><\/mrow><mn>2<\/mn><\/msubsup><annotation encoding=\"application\/x-tex\">R^2_{SB}<\/annotation><\/semantics><\/math>\ub294 \ubaa8\ud615\uc774 \ubcf5\uc7a1\ud574\uc9c8 \ub54c(\ub79c\ub364 \ud6a8\uacfc \ucd94\uac00 \ub4f1) \uac12\uc774 \uc624\ud788\ub824 \uc904\uc5b4\ub4dc\ub294 \uacbd\uc6b0\uac00 \uc788\uc5b4 \ud574\uc11d\uc5d0 \uc8fc\uc758\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. \ubc18\uba74 <math data-latex=\"R^2_E\"><semantics><msubsup><mi>R<\/mi><mi>E<\/mi><mn>2<\/mn><\/msubsup><annotation encoding=\"application\/x-tex\">R^2_E<\/annotation><\/semantics><\/math>\ub294 \uace0\uc815 \ud6a8\uacfc\uc758 \uc124\uba85\ub825\uc744 \ubd84\ub9ac\ud574\uc11c \ubcf4\ub294 \ub370 \uac15\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. \uc815\ubcf4 \uae30\uc900(Information Criteria): AIC\uc640 BIC<\/h2>\n\n\n\n<p>\ubaa8\ud615\uc758 \uc801\ud569\ub3c4(Likelihood)\uc640 \uac04\uba85\uc131(Parsimony, \ubcc0\uc218\uac00 \uc801\uc744\uc218\ub85d \uc88b\uc74c) \uc0ac\uc774\uc758 \uade0\ud615\uc744 \ub9de\ucd94\ub294 \uc9c0\ud45c\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 \uae30\ubcf8 \uac1c\ub150<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Deviance (\uc774\ud0c8\ub3c4):<\/strong> \ubaa8\ud615\uc774 \ub370\uc774\ud130\ub97c \uc5bc\ub9c8\ub098 \uc798 \uc124\uba85 \ubabb\ud558\ub294\uac00? (\ub0ae\uc744\uc218\ub85d \uc88b\uc74c).<\/li>\n\n\n\n<li><strong>AIC (Akaike Information Criterion):<\/strong> \uc608\uce21 \uc815\ud655\ub3c4\ub97c \ub192\uc774\ub294 \ub370 \ucd08\uc810. \uc2e4\uc81c \ubaa8\ud615\uc774 \ud6c4\ubcf4\uad70\uc5d0 \uc5c6\uc5b4\ub3c4 \uac00\uc7a5 \uadfc\uc0ac\ud55c \ubaa8\ud615\uc744 \ucc3e\uc74c.\n<ul class=\"wp-block-list\">\n<li><math data-latex=\"AIC = Deviance + 2k\"><semantics><mrow><mi>A<\/mi><mi>I<\/mi><mi>C<\/mi><mo>=<\/mo><mi>D<\/mi><mi>e<\/mi><mi>v<\/mi><mi>i<\/mi><mi>a<\/mi><mi>n<\/mi><mi>c<\/mi><mi>e<\/mi><mo>+<\/mo><mn>2<\/mn><mi>k<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">AIC = Deviance + 2k<\/annotation><\/semantics><\/math> (<math data-latex=\"k\"><semantics><mi>k<\/mi><annotation encoding=\"application\/x-tex\">k<\/annotation><\/semantics><\/math>: \ud30c\ub77c\ubbf8\ud130 \uc218)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>BIC (Bayesian Information Criterion):<\/strong> &#8216;\uc9c4\uc9dc \ubaa8\ud615(True Model)&#8217;\uc744 \ucc3e\ub294 \ub370 \ucd08\uc810. \ud45c\ubcf8 \ud06c\uae30(<math data-latex=\"n\"><semantics><mi>n<\/mi><annotation encoding=\"application\/x-tex\">n<\/annotation><\/semantics><\/math>)\uac00 \ucee4\uc9c8\uc218\ub85d \ud398\ub110\ud2f0\uac00 \uac15\ud574\uc838\uc11c \ub354 \ub2e8\uc21c\ud55c \ubaa8\ud615\uc744 \uc120\ud638\ud568.\n<ul class=\"wp-block-list\">\n<li><math data-latex=\"BIC = Deviance + k \\ln(n)\"><semantics><mrow><mi>B<\/mi><mi>I<\/mi><mi>C<\/mi><mo>=<\/mo><mi>D<\/mi><mi>e<\/mi><mi>v<\/mi><mi>i<\/mi><mi>a<\/mi><mi>n<\/mi><mi>c<\/mi><mi>e<\/mi><mo>+<\/mo><mi>k<\/mi><mrow><mspace width=\"0.1667em\"><\/mspace><mi>ln<\/mi><mo>\u2061<\/mo><\/mrow><mo form=\"prefix\" stretchy=\"false\">(<\/mo><mi>n<\/mi><mo form=\"postfix\" stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">BIC = Deviance + k \\ln(n)<\/annotation><\/semantics><\/math><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 \ub2e4\uce35\ubaa8\ud615\uc5d0\uc11c\uc758 \ub09c\uc81c: \uc5b4\ub5a4 Likelihood\ub97c \uc4f8 \uac83\uc778\uac00?<\/h3>\n\n\n\n<p>\ub2e4\uce35\ubaa8\ud615\uc5d0\uc11c\ub294 \uc6b0\ub3c4(Likelihood)\ub97c \uacc4\uc0b0\ud558\ub294 \ubc29\uc2dd\uc774 \ud06c\uac8c \ub450 \uac00\uc9c0\ub85c \ub098\ub269\ub2c8\ub2e4. \uc774 \ubd80\ubd84\uc774 \uac00\uc7a5 \ud5f7\uac08\ub9ac\ub294 \ubd80\ubd84\uc774\ub2c8 \uc9d1\uc911\ud574 \uc8fc\uc138\uc694.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">(1) Marginal Likelihood (\uc8fc\ubcc0 \uc6b0\ub3c4) vs. Conditional Likelihood (\uc870\uac74\ubd80 \uc6b0\ub3c4)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Marginal Likelihood (<\/strong><math data-latex=\"LL_{MARG}\"><semantics><mrow><mi>L<\/mi><msub><mi>L<\/mi><mrow><mi>M<\/mi><mi>A<\/mi><mi>R<\/mi><mi>G<\/mi><\/mrow><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">LL_{MARG}<\/annotation><\/semantics><\/math><strong>):<\/strong> \ub79c\ub364 \ud6a8\uacfc(<math data-latex=\"u\"><semantics><mi>u<\/mi><annotation encoding=\"application\/x-tex\">u<\/annotation><\/semantics><\/math>)\ub97c \uc801\ubd84\ud574\uc11c \uc5c6\uc560\ubc84\ub9b0 \uc6b0\ub3c4\uc785\ub2c8\ub2e4. <strong>&#8220;\uc804\uccb4 \ubaa8\uc9d1\ub2e8(\ud3c9\uade0\uc801\uc778 \ud559\uc0dd)&#8221;<\/strong>\uc5d0 \ub300\ud55c \ucd94\ub860\uc744 \ud560 \ub54c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>Conditional Likelihood (<\/strong><math data-latex=\"LL_{COND}\"><semantics><mrow><mi>L<\/mi><msub><mi>L<\/mi><mrow><mi>C<\/mi><mi>O<\/mi><mi>N<\/mi><mi>D<\/mi><\/mrow><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">LL_{COND}<\/annotation><\/semantics><\/math><strong>):<\/strong> \ub79c\ub364 \ud6a8\uacfc(<math data-latex=\"u\"><semantics><mi>u<\/mi><annotation encoding=\"application\/x-tex\">u<\/annotation><\/semantics><\/math>)\ub97c \ud2b9\uc815\ud55c \uac12\uc73c\ub85c \uc870\uac74\ud654\ud55c \uc6b0\ub3c4\uc785\ub2c8\ub2e4. <strong>&#8220;\ud2b9\uc815 \ud559\uae09(Cluster)&#8221;<\/strong>\uc5d0 \ub300\ud55c \uc608\uce21\uc744 \ud560 \ub54c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.\n<ul class=\"wp-block-list\">\n<li>Vaida &amp; Blanchard(2005)\ub294 \uc774\ub97c \ubc14\ud0d5\uc73c\ub85c <strong>Conditional AIC (cAIC)<\/strong>\ub97c \uc81c\uc548\ud588\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">(2) ML vs. REML<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>ML (Maximum Likelihood):<\/strong> \uace0\uc815 \ud6a8\uacfc\ub97c \ube44\uad50\ud560 \ub54c \uc8fc\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ubd84\uc0b0 \uc131\ubd84(Variance Component)\uc744 \uacfc\uc18c\ucd94\uc815\ud558\ub294 \uacbd\ud5a5\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>REML (Restricted ML):<\/strong> \ubd84\uc0b0 \uc131\ubd84\uc744 \uc815\ud655\ud558\uac8c \ucd94\uc815\ud569\ub2c8\ub2e4. \ud558\uc9c0\ub9cc <strong>\uace0\uc815 \ud6a8\uacfc \uad6c\uc870\uac00 \ub2e4\ub978 \ubaa8\ub378\ub07c\ub9ac \ube44\uad50\ud560 \ub54c\ub294 \uc0ac\uc6a9\ud558\uba74 \uc548 \ub429\ub2c8\ub2e4<\/strong> (\uc608: \ubcc0\uc218 A\uac00 \uc788\ub294 \ubaa8\ub378 vs \uc5c6\ub294 \ubaa8\ub378 \ube44\uad50 \uc2dc \uc0ac\uc6a9 \ubd88\uac00).\n<ul class=\"wp-block-list\">\n<li><em>\uc608\uc678:<\/em> Gurka(2006) \uac19\uc740 \ud559\uc790\ub294 \ubca0\uc774\uc9c0\uc548 \uad00\uc810\uc5d0\uc11c \ube44\uad50\ud558\uae30\ub3c4 \ud558\uc9c0\ub9cc, \uc77c\ubc18\uc801\uc778 \uad00\ub840\ub294 \uc544\ub2d9\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. \ubd84\uc11d \uc2e4\uc2b5: jamovi &amp; R<\/h2>\n\n\n\n<p>\uc774\uc81c \uc704\uc5d0\uc11c \uc0dd\uc131\ud55c \ub370\uc774\ud130\ub97c \ubc14\ud0d5\uc73c\ub85c \uc138 \uac00\uc9c0 \ubaa8\ud615\uc744 \ube44\uad50\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Model A (Null Model):<\/strong> \uc124\uba85\ubcc0\uc218 \uc5c6\uc74c. (\ud559\uad50 \uac04 \ucc28\uc774\ub9cc \ud655\uc778)<\/li>\n\n\n\n<li><strong>Model B (Random Intercept):<\/strong> \uc0ac\uad50\uc721 \uc2dc\uac04(<math data-latex=\"X\"><semantics><mi>X<\/mi><annotation encoding=\"application\/x-tex\">X<\/annotation><\/semantics><\/math>)\uacfc \uad50\uc0ac \uc5f4\uc815(<math data-latex=\"Z\"><semantics><mi>Z<\/mi><annotation encoding=\"application\/x-tex\">Z<\/annotation><\/semantics><\/math>) \ud3ec\ud568. (\uc808\ud3b8\ub9cc \ubb34\uc791\uc704)<\/li>\n\n\n\n<li><strong>Model C (Random Slope):<\/strong> \uc0ac\uad50\uc721 \uc2dc\uac04(<math data-latex=\"X\"><semantics><mi>X<\/mi><annotation encoding=\"application\/x-tex\">X<\/annotation><\/semantics><\/math>)\uc758 \ud6a8\uacfc\uac00 \ud559\uae09\ub9c8\ub2e4 \ub2e4\ub984\uc744 \ud5c8\uc6a9. (\uae30\uc6b8\uae30\ub3c4 \ubb34\uc791\uc704)<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 \ubd84\uc11d \uc804\ub7b5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ub3c4\uad6c:<\/strong> jamovi\uc758 <code>GAMLj<\/code> \ubaa8\ub4c8 \ub610\ub294 <code>Linear Mixed Models<\/code> (\uae30\ubcf8). \uc5ec\uae30\uc11c\ub294 \uc0c1\uc138\ud55c <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\uc640 IC \uacc4\uc0b0\uc744 \uc704\ud574 R \ucf54\ub4dc\ub97c \ud65c\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc808\ucc28:<\/strong>\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Null Model\ub85c \uae09\ub0b4\uc0c1\uad00\uacc4\uc218(ICC) \ud655\uc778.<\/li>\n\n\n\n<li>Model B \uc801\ud569 \ud6c4 <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math> \ubc0f AIC\/BIC \ud655\uc778.<\/li>\n\n\n\n<li>Model C \uc801\ud569 \ud6c4 Model B\uc640 \ube44\uad50 (LRT \ubc0f \uc815\ubcf4 \uae30\uc900).<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 R \ucf54\ub4dc \uad6c\ud604 (\ubd84\uc11d \ubc0f \uacb0\uacfc \ube44\uad50)<\/h3>\n\n\n\n<p>R<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>library(lme4)\nlibrary(performance) # R2 \ubc0f IC \uacc4\uc0b0\uc744 \uc704\ud55c \ud328\ud0a4\uc9c0\nlibrary(MuMIn) # r.squaredGLMM \ub4f1\n\n# 1. Model A: Null Model\nmodel_a &lt;- lmer(MathScore ~ 1 + (1 | ClassID), data = data, REML = FALSE)\n\n# 2. Model B: Random Intercept Model (\uace0\uc815\ud6a8\uacfc \ucd94\uac00)\nmodel_b &lt;- lmer(MathScore ~ PrivateEdu + TeacherPassion + (1 | ClassID), \n                data = data, REML = FALSE)\n\n# 3. Model C: Random Slope Model (\uc0c1\ud638\uc791\uc6a9 \ubc0f \ub79c\ub364 \uae30\uc6b8\uae30 \ucd94\uac00)\nmodel_c &lt;- lmer(MathScore ~ PrivateEdu * TeacherPassion + (PrivateEdu | ClassID), \n                data = data, REML = FALSE)\n\n# 4. \ubaa8\ud615 \ube44\uad50 (AIC, BIC, Log-likelihood)\ncomparison &lt;- compare_performance(model_a, model_b, model_c, metrics = c(\"AIC\", \"BIC\", \"R2\"))\nprint(comparison)\n\n# 5. Snijders &amp; Bosker R2 \uacc4\uc0b0 (MuMIn \ud328\ud0a4\uc9c0 \ud65c\uc6a9)\nr2_results &lt;- r.squaredGLMM(model_c)\nprint(r2_results)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 \uacb0\uacfc \ud574\uc11d (\uac00\uc0c1\uc758 \uacb0\uacfc\uac12 \uc608\uc2dc)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Criteria<\/strong><\/td><td><strong>Model A (Null)<\/strong><\/td><td><strong>Model B (Rand. Int)<\/strong><\/td><td><strong>Model C (Rand. Slope + Interaction)<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>AIC<\/strong><\/td><td>6982.3(&lt;.001)<\/td><td>6788.0(&lt;.001)<\/td><td><strong>6389.9(>.999)<\/strong><\/td><\/tr><tr><td><strong>BIC<\/strong><\/td><td>6997.0(&lt;.001)<\/td><td>6812.5(&lt;.001)<\/td><td><strong>6429.2(>.999)<\/strong><\/td><\/tr><tr><td><strong>Marginal <\/strong><math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math><\/td><td>0.000<\/td><td>0.169<\/td><td>0.205<\/td><\/tr><tr><td><strong>Conditional <\/strong><math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math><\/td><td>0.729<\/td><td>0.777<\/td><td><strong>0.861<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ud574\uc11d:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>AIC\/BIC:<\/strong> Model C\uac00 \uac00\uc7a5 \ub0ae\uc740 \uac12\uc744 \uac00\uc9c0\ubbc0\ub85c, <strong>&#8220;\uad50\uc0ac\uc758 \uc5f4\uc815\uc774 \uc0ac\uad50\uc721 \ud6a8\uacfc\ub97c \uc870\uc808\ud558\uba70, \ud559\uae09\ubcc4\ub85c \uc0ac\uad50\uc721 \ud6a8\uacfc\uac00 \ub2e4\ub974\ub2e4&#8221;<\/strong>\ub294 \ubaa8\ud615\uc774 \uac00\uc7a5 \uc801\ud569\ud569\ub2c8\ub2e4. (AIC\uac00 2 \uc774\uc0c1 \ucc28\uc774 \ub098\uba74 \uc720\uc758\ubbf8\ud55c \ucc28\uc774\ub85c \ubd05\ub2c8\ub2e4).<\/li>\n\n\n\n<li><math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math><strong>:<\/strong> Conditional <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>\uac00 0.861\uc774\ub77c\ub294 \uac83\uc740, \uace0\uc815 \ubcc0\uc218\uc640 \ud559\uae09\ubcc4 \ub79c\ub364 \ud6a8\uacfc\ub97c \ubaa8\ub450 \uace0\ub824\ud588\uc744 \ub54c \ud559\uc0dd\ub4e4\uc758 \uc131\uc801 \ubcc0\ub3d9\uc744 86.1% \uc124\uba85\ud55c\ub2e4\ub294 \ub73b\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. \uc2dc\uac01\ud654: \ubcf5\uc7a1\ud55c \uc218\uc2dd \ub300\uc2e0 \uadf8\ub9bc\uc73c\ub85c<\/h2>\n\n\n\n<p>\ub2e4\uce35\ubaa8\ud615\uc758 \uaf43\uc740 \uc2dc\uac01\ud654\uc785\ub2c8\ub2e4. \ud559\uae09\ubcc4\ub85c \uae30\uc6b8\uae30\uac00 \ub2e4\ub978 \uac83\uc744 \ubcf4\uc5ec\uc8fc\ub294 \uac83\uc774 Model C\uc758 \ud575\uc2ec\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p>R<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>library(ggplot2)\n\n# \uc608\uce21\uac12 \uc0dd\uc131\ndata$pred &lt;- predict(model_c)\n\n# \uc2dc\uac01\ud654\nggplot(data, aes(x = PrivateEdu, y = MathScore, group = ClassID)) +\n  geom_point(alpha = 0.1, color = \"gray\") + # \uc804\uccb4 \ub370\uc774\ud130 \uc810\n  geom_line(aes(y = pred, color = ClassID), alpha = 0.5) + # \ud559\uae09\ubcc4 \ud68c\uadc0\uc120\n  theme_minimal() +\n  theme(legend.position = \"none\") +\n  labs(title = \"\ud559\uae09\ubcc4 \uc0ac\uad50\uc721 \uc2dc\uac04\uacfc \uc218\ud559 \uc131\ucde8\ub3c4\uc758 \uad00\uacc4 (Random Slope Model)\",\n       x = \"\uc0ac\uad50\uc721 \uc2dc\uac04\", y = \"\uc218\ud559 \uc131\ucde8\ub3c4\")\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"634\" height=\"1024\" src=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/FIG07-1-634x1024.png\" alt=\"\" class=\"wp-image-740\" style=\"aspect-ratio:0.6191510365251728;width:402px;height:auto\" srcset=\"http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/FIG07-1-634x1024.png 634w, http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/FIG07-1-186x300.png 186w, http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/FIG07-1-624x1008.png 624w, http:\/\/waurimal.kr\/wp-content\/uploads\/2026\/01\/FIG07-1.png 706w\" sizes=\"auto, (max-width: 634px) 100vw, 634px\" \/><\/figure>\n\n\n\n<p>\uc774 \uadf8\ub798\ud504\ub97c \ubcf4\uba74, \uc5b4\ub5a4 \ubc18\uc740 \uc0ac\uad50\uc721 \ud6a8\uacfc\uac00 \uac00\ud30c\ub974\uace0(\uae30\uc6b8\uae30 \uae09\ud568), \uc5b4\ub5a4 \ubc18\uc740 \uc644\ub9cc\ud558\ub2e4\ub294 \uac83\uc744 \ud55c\ub208\uc5d0 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uac83\uc774 \ubc14\ub85c <strong>Random Slope(\ub79c\ub364 \uae30\uc6b8\uae30)<\/strong>\uc758 \uc758\ubbf8\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">7. \uacb0\ub860 \ubc0f \uc81c\uc5b8<\/h2>\n\n\n\n<p>Steele \uad50\uc218\uc758 \ucc55\ud130 \ub0b4\uc6a9\uc744 \uc885\ud569\ud558\uba74, \ub2e4\uce35\ubaa8\ud615\uc5d0\uc11c\uc758 \ubaa8\ud615 \uc120\ud0dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uc6d0\uce59\uc744 \ub530\ub985\ub2c8\ub2e4.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\ud558\ub098\uc758 \uae30\uc900\uc5d0 \ub9f9\uc2e0\ud558\uc9c0 \ub9c8\uc138\uc694.<\/strong> <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math>, AIC, BIC, \uadf8\ub9ac\uace0 \uc774\ub860\uc801 \ubc30\uacbd\uc744 \ubaa8\ub450 \uace0\ub824\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc5f0\uad6c \ubaa9\uc801\uc5d0 \ub9de\ub294 Likelihood\ub97c \uc120\ud0dd\ud558\uc138\uc694.<\/strong>\n<ul class=\"wp-block-list\">\n<li>\uc0c8\ub85c\uc6b4 \ud559\uad50\uc5d0 \uc77c\ubc18\ud654\ud558\uace0 \uc2f6\ub2e4\uba74? \u2192 <strong>Marginal Likelihood (AIC)<\/strong><\/li>\n\n\n\n<li>\ud2b9\uc815 \ud559\uae09 \ub0b4 \ud559\uc0dd\uc744 \uc608\uce21\ud558\uace0 \uc2f6\ub2e4\uba74? \u2192 <strong>Conditional Likelihood (cAIC)<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\uace0\uc815 \ud6a8\uacfc \ube44\uad50 \uc2dc\uc5d0\ub294 ML, \ucd5c\uc885 \ud30c\ub77c\ubbf8\ud130 \ucd94\uc815\uc740 REML<\/strong>\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc815\uc11d\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub2e8\uc21c\ud788 \uc218\uce58\uc801\uc73c\ub85c \uc6b0\uc218\ud55c \ubaa8\ub378\ubcf4\ub2e4, <strong>&#8220;\ud574\uc11d \uac00\ub2a5\ud558\uace0(interpretable)&#8221; \uc2e4\uc81c \uad50\uc721 \ud604\uc7a5\uc758 \ud604\uc0c1\uc744 \uc798 \uc124\uba85\ud558\ub294 \ubaa8\ub378<\/strong>\uc744 \uc120\ud0dd\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>[\ucc38\uace0 \ubb38\ud5cc]<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Akaike, H. (1973). Information theory and an extension of the maximum likelihood principle. In <em>Second International Symposium on Information Theory<\/em> (pp. 267\u2013281). Springer Verlag.<\/li>\n\n\n\n<li>Burnham, K. P., &amp; Anderson, D. R. (2002). <em>Model selection and multimodel inference: A practical information-theoretic approach<\/em>. Springer.<\/li>\n\n\n\n<li>Edwards, L. J., Muller, K. E., Wolfinger, R. D., Qaqish, B. F., &amp; Schabenberger, O. (2008). An <math data-latex=\"R^2\"><semantics><msup><mi>R<\/mi><mn>2<\/mn><\/msup><annotation encoding=\"application\/x-tex\">R^2<\/annotation><\/semantics><\/math> statistic for fixed effects in the linear mixed model. <em>Statistics in Medicine, 27<\/em>, 6137\u20136157.<\/li>\n\n\n\n<li>Gurka, M. J. (2006). Selecting the best linear mixed model under REML. <em>The American Statistician, 60<\/em>, 19\u201326.<\/li>\n\n\n\n<li>Snijders, T. A. B., &amp; Bosker, R. J. (1994). Modeled variance in two-level models. <em>Sociological Methods and Research, 22<\/em>, 342\u2013363.<\/li>\n\n\n\n<li>Steele, R. (2013). Model selection for multilevel models. In <em>The SAGE Handbook of Multilevel Modeling<\/em> (Chapter 7).<\/li>\n\n\n\n<li>Vaida, F., &amp; Blanchard, S. (2005). Conditional Akaike information for mixed-effects models. <em>Biometrika, 92<\/em>, 351\u2013370.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\uc548\ub155\ud558\uc138\uc694! \uc624\ub298\uc740 &#8220;\ub2e4\uce35\ubaa8\ud615(Multilevel Model)\uc5d0\uc11c\uc758 \ubaa8\ud615 \uc120\ud0dd(Model Selection)&#8221;\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \u201c\ud559\uad50 \ud604\uc7a5\uc758 \ub370\uc774\ud130\u201d\ub97c \uc608\uc2dc\ub85c \ub4e4\uc5b4 \uc9c1\uad00\uc801\uc778 \uc124\uba85\uacfc \uc218\ub9ac\uc801 \uc5c4\ubc00\ud568\uc744 \ubaa8\ub450 \uac16\ucd98 \ud615\ud0dc\ub85c \uc7ac\uad6c\uc131\ud574 \ub4dc\ub9ac\uaca0\uc2b5\ub2c8\ub2e4. \ubd84\uc11d \ub3c4\uad6c\ub85c\ub294 jamovi\uc758 \uc0ac\uc6a9\ubc95\uc744 \uc124\uba85\ud558\ub418, jamovi\uc758 \uae30\ubc18\uc774 \ub418\ub294 R \ucf54\ub4dc\ub97c \ud568\uaed8 \uc81c\uc2dc\ud558\uc5ec \ubaa8\uc758 \ub370\uc774\ud130 \uc0dd\uc131\ubd80\ud130 \ubd84\uc11d, \uc2dc\uac01\ud654\uae4c\uc9c0 \uc644\ubcbd\ud558\uac8c \uad6c\ud604\ud574 \ub4dc\ub9ac\uaca0\uc2b5\ub2c8\ub2e4. 1. \uc11c\ub860: \uc644\ubcbd\ud55c \uc637\uc744 \uace0\ub974\ub294 \ubc95 (\ubaa8\ud615 \uc120\ud0dd\uc758 \ub51c\ub808\ub9c8) \uc5ec\ub7ec\ubd84\uc774 \ubc31\ud654\uc810\uc5d0\uc11c \uc637\uc744 <a class=\"read-more\" href=\"http:\/\/waurimal.kr\/?p=738\">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":[399],"tags":[145,199,419,400,415],"class_list":["post-738","post","type-post","status-publish","format-standard","hentry","category-multilevel","tag-jamovi","tag-r","tag-r2","tag-400","tag-415"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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