{"id":16348,"date":"2024-04-07T21:01:50","date_gmt":"2024-04-07T21:01:50","guid":{"rendered":"https:\/\/promoguy.nl\/?post_type=entity&p=16348"},"modified":"2024-04-07T21:01:50","modified_gmt":"2024-04-07T21:01:50","slug":"specificity","status":"publish","type":"entity","link":"https:\/\/promoguy.nl\/pt\/blog\/vocabulary\/specificity\/","title":{"rendered":"especificidade"},"content":{"rendered":"<p>A sensibilidade e a especificidade s\u00e3o medidas estat\u00edsticas do desempenho de um teste de classifica\u00e7\u00e3o bin\u00e1ria, tamb\u00e9m conhecido em estat\u00edstica como fun\u00e7\u00e3o de classifica\u00e7\u00e3o. A sensibilidade (tamb\u00e9m designada por taxa de verdadeiros positivos, ou taxa de rechamada em alguns dom\u00ednios) mede a propor\u00e7\u00e3o de verdadeiros positivos que s\u00e3o corretamente identificados como tal (por exemplo, a percentagem de pessoas doentes que s\u00e3o corretamente identificadas como tendo a doen\u00e7a) e \u00e9 complementar \u00e0 taxa de falsos negativos. A especificidade (por vezes designada por taxa de verdadeiros negativos) mede a propor\u00e7\u00e3o de negativos que s\u00e3o corretamente identificados como tal (por exemplo, a percentagem de pessoas saud\u00e1veis que s\u00e3o corretamente identificadas como n\u00e3o tendo a doen\u00e7a) e \u00e9 complementar \u00e0 taxa de falsos positivos. Um preditor perfeito seria descrito como 100% sens\u00edvel (p. ex., todos os doentes s\u00e3o identificados como doentes) e 100% espec\u00edfico (p. ex., todos os saud\u00e1veis n\u00e3o s\u00e3o identificados como doentes); no entanto, teoricamente, qualquer preditor ter\u00e1 um limite m\u00ednimo de erro conhecido como taxa de erro de Bayes. Para qualquer teste, existe normalmente um compromisso entre as medidas. Por exemplo, num contexto de seguran\u00e7a aeroportu\u00e1ria, em que se est\u00e1 a testar potenciais amea\u00e7as \u00e0 seguran\u00e7a, os scanners podem ser configurados para disparar sobre objectos de baixo risco, como fivelas de cintos e chaves (baixa especificidade), a fim de reduzir o risco de perder objectos que representem uma amea\u00e7a para o avi\u00e3o e para as pessoas a bordo (alta sensibilidade). Este compromisso pode ser representado graficamente como uma curva carater\u00edstica de funcionamento do recetor.<\/p>","protected":false},"excerpt":{"rendered":"<p>Sensitivity and specificity are statistical measures of the performance of a binary classification test, also known in statistics as classification function. Sensitivity (also called the true positive rate, or the recall rate in some fields) measures the proportion of actual positives which are correctly identified as such (e.g., the percentage of sick people who are [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"","ping_status":"closed","template":"","meta":{"_acf_changed":false,"wl_entities_gutenberg":"","footnotes":""},"categories":[],"wl_entity_type":[39],"class_list":["post-16348","entity","type-entity","status-publish","hentry","wl_entity_type-thing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>specificity - Promoguy Digital Marketing Agency<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"specificity\" \/>\n<meta property=\"og:description\" content=\"Sensitivity and specificity are statistical measures of the performance of a binary classification test, also known in statistics as classification function. 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