{"id":22918,"date":"2015-12-29T12:00:37","date_gmt":"2015-12-29T11:00:37","guid":{"rendered":"https:\/\/www.emagister.com\/blog\/?p=22918"},"modified":"2021-04-27T11:00:04","modified_gmt":"2021-04-27T09:00:04","slug":"metodos-estadisticos-robustos-para-maximizar-la-precision-de-tu-investigacion","status":"publish","type":"post","link":"https:\/\/www.emagister.com\/blog\/metodos-estadisticos-robustos-para-maximizar-la-precision-de-tu-investigacion\/","title":{"rendered":"M\u00e9todos estad\u00edsticos robustos para maximizar la precisi\u00f3n de tu investigaci\u00f3n"},"content":{"rendered":"<p>Cualquier investigador habr\u00e1 escuchado hablar alguna vez de las pruebas de <strong>hip\u00f3tesis param\u00e9tricas cl\u00e1sicas<\/strong> (e.g. t de Student, ANOVA, regresi\u00f3n por m\u00ednimos cuadrados). Son el tipo de pruebas m\u00e1s utilizado aunque requieren que se cumplan sus supuestos (e.g. normalidad y homogeneidad de varianza) para que realmente generen buenos resultados.\u00a0Los <strong>datos reales<\/strong> no suelen cumplir con estos supuestos, y, como consecuencia,\u00a0disminuye la capacidad de detectar efectos reales (i.e. afecta al -valor, adem\u00e1s del tama\u00f1o del efecto y a los intervalo de confianza estimados). \u00a1Toda la interpretaci\u00f3n de tus datos puede ser err\u00f3nea!. Pero no hay que alarmarse, tenemos una soluci\u00f3n.<!--more--><\/p>\n<p>Los <strong>m\u00e9todos estad\u00edsticos robustos<\/strong> son t\u00e9cnicas modernas que hacen frente a estos problemas, son sencillos y se encuentran disponibles en softwares gratuitos como R. Sin embargo, debemos reconocer que su desconocimiento hace que raramente sean utilizados por los investigadores.<\/p>\n<p>\u00bfPor qu\u00e9 son desconocidos?\u00a0La mayor\u00eda de los investigadores no son conscientes de las serias <strong>limitaciones<\/strong> de los m\u00e9todos cl\u00e1sicos, y\u00a0no saben c\u00f3mo comprobar los supuestos de la estad\u00edstica cl\u00e1sica y\/o no est\u00e1n familiarizados con las alternativas modernas.<\/p>\n<h2>Problemas con los m\u00e9todos cl\u00e1sicos.<\/h2>\n<p>Revisemos los principales problemas con los m\u00e9todos param\u00e9tricos cl\u00e1sicos para entender su importancia.<\/p>\n<ol>\n<li>Los datos reales suelen ser <strong>multimodales<\/strong>, asim\u00e9tricos y con largas colas en su distribuci\u00f3n de valores, por lo que raramente son normales.<\/li>\n<li>La igualdad de <strong>varianza poblacional<\/strong> (i.e. homogeneidad de varianza u homocedasticidad) suele no cumplirse, debido a la naturaleza de los dise\u00f1os experimentales y de las muestras.<\/li>\n<li><strong>Variabilidad<\/strong> inherente a los datos. Los grupos definidos por un <em>factor pre-existente<\/em> pueden tener varianzas diferentes. Por ejemplo, la respuesta a un test cognitivo es m\u00e1s variable en personas mayores que en los j\u00f3venes.\u00a0<a href=\"https:\/\/www.emagister.com\/blog\/wp-content\/uploads\/2015\/12\/ThinkstockPhotos-86534959.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-22925\" src=\"https:\/\/www.emagister.com\/blog\/wp-content\/uploads\/2015\/12\/ThinkstockPhotos-86534959-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" \/><\/a><\/li>\n<\/ol>\n<p>Los estad\u00edsticos robustos son capaces de <strong>disminuir la tasa de error<\/strong> tipo I y tambi\u00e9n mejorar la potencia de la prueba cuando los datos no son normales ni homog\u00e9neos.<\/p>\n<h2>\u00bfPor qu\u00e9 se utilizan poco los m\u00e9todos modernos?<\/h2>\n<p>Los motivos m\u00e1s comunes son:<\/p>\n<ol>\n<li>Falta de familiaridad.<\/li>\n<li>Falta de corroboraci\u00f3n de los supuestos cl\u00e1sicos.<\/li>\n<li>Err\u00f3neo argumento de la resistencia.<\/li>\n<li>Err\u00f3nea utilizaci\u00f3n de las transformaciones.<\/li>\n<li>Err\u00f3nea utilizaci\u00f3n de las pruebas no-param\u00e9tricas cl\u00e1sicas.<\/li>\n<li>Conceptos err\u00f3neos acerca de los m\u00e9todos modernos.<\/li>\n<\/ol>\n<h2>Hay poco que perder y mucho que ganar.<\/h2>\n<p>Los m\u00e9todos robustos modernos son dise\u00f1ados para obtener un buen desempe\u00f1o cuando los supuestos cl\u00e1sicos se cumplen y tambi\u00e9n cuando se incumplen. Por lo tanto, hay poco que perder y mucho que ganar a la hora de utilizar estas t\u00e9cnicas en lugar de las cl\u00e1sicas. Una estrategia alternativa es utilizar <strong>ambos m\u00e9todos<\/strong> y decidir en funci\u00f3n de la evidencia de los resultados.<\/p>\n<p><a href=\"https:\/\/www.emagister.com\/blog\/wp-content\/uploads\/2015\/12\/ThinkstockPhotos-477529408.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-22927 alignleft\" src=\"https:\/\/www.emagister.com\/blog\/wp-content\/uploads\/2015\/12\/ThinkstockPhotos-477529408-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" \/><\/a>Si deseas maximizar la potencia y precisi\u00f3n de tu investigaci\u00f3n recuerda que el\u00a0<em><a href=\"https:\/\/www.emagister.com\/master-universitario-estadistica-aplicada-r-software-tecnicas-clasicas-robustas-avanzadas-multivariantes-cursos-3237344.htm\" target=\"_blank\" rel=\"noopener\">M\u00e1ster de Estad\u00edstica Aplicada con R software<\/a><\/em>\u00a0de M\u00e1xima Formaci\u00f3n es el \u00fanico en el que podr\u00e1s aprender t\u00e9cnicas robustas de vanguardia mediante ejemplos con datos reales utilizando R software.<\/p>\n<p>En <a href=\"https:\/\/www.emagister.com\/maxima-formacion-cursos-90145-centrodetalles.htm\" target=\"_blank\" rel=\"noopener\">M\u00e1xima Formaci\u00f3n<\/a>\u00a0te ofrecemos la oportunidad de actualizar tus conocimientos de estad\u00edstica con herramientas capaces de lidiar con datos complejos, para que trabajes con total seguridad y confianza en tu investigaci\u00f3n.<\/p>\n<p>&nbsp;<\/p>\n<p>Este texto es una adaptaci\u00f3n del art\u00edculo:<\/p>\n<p>Erceg-Hurn, D. M., &amp; Mirosevich, V. M. (2008). Modern robust statistical methods: an easy way to maximize the accuracy and power of your research. American Psychologist, 63(7), 591.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cualquier investigador habr\u00e1 escuchado hablar alguna vez de las pruebas de hip\u00f3tesis param\u00e9tricas cl\u00e1sicas (e.g. t de Student, ANOVA, regresi\u00f3n &#8230; <a title=\"M\u00e9todos estad\u00edsticos robustos para maximizar la precisi\u00f3n de tu investigaci\u00f3n\" class=\"read-more\" href=\"https:\/\/www.emagister.com\/blog\/metodos-estadisticos-robustos-para-maximizar-la-precision-de-tu-investigacion\/\" aria-label=\"M\u00e1s en M\u00e9todos estad\u00edsticos robustos para maximizar la precisi\u00f3n de tu investigaci\u00f3n\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":145,"featured_media":22921,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[785],"tags":[10141,973,1153,2832,2950,3004,3005,3006],"class_list":["post-22918","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nuestros-clientes","tag-noticiaselpais","tag-datos","tag-investigacion","tag-noticias-de-centros-de-formacion","tag-2950","tag-tecnicas-de-investigacion","tag-metodos-estadisticos-robustos","tag-hipotesis","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-25"],"acf":{"bannerid1":null,"bannerid2":null,"hreflang":null,"estilo_titulo":null,"fecha":null,"mostrar_faldon":null,"texto_faldon":null,"link_faldon":null,"link_texto_faldon":null,"link_button_faldon":null,"noticiasElPais":null,"noticiasLaVanguardia":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>M\u00e9todos estad\u00edsticos robustos para maximizar la precisi\u00f3n de tu investigaci\u00f3n - Blog Emagister<\/title>\n<meta name=\"description\" content=\"Son pocos investigadores los que utilizan m\u00e9todos estad\u00edsticos robustos en procesos de investigaci\u00f3n, que aportan mayor precisi\u00f3n a los datos resultantes.\" \/>\n<meta name=\"robots\" content=\"index, follow\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.emagister.com\/blog\/metodos-estadisticos-robustos-para-maximizar-la-precision-de-tu-investigacion\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u00e9todos estad\u00edsticos robustos para maximizar la precisi\u00f3n de tu investigaci\u00f3n\" \/>\n<meta property=\"og:description\" content=\"Son pocos 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