

{"id":981052,"date":"2018-09-27T02:00:32","date_gmt":"2018-09-27T09:00:32","guid":{"rendered":"https:\/\/www.questionpro.com\/blog\/investigacao-experimental-o-que-e-tipos-e-como-realiza-la\/"},"modified":"2025-01-24T08:18:55","modified_gmt":"2025-01-24T15:18:55","slug":"investigacao-experimental-o-que-e-tipos-e-como-realiza-la","status":"publish","type":"post","link":"https:\/\/www.questionpro.com\/blog\/pt\/investigacao-experimental-o-que-e-tipos-e-como-realiza-la\/","title":{"rendered":"Investiga\u00e7\u00e3o experimental: o que \u00e9, tipos e como realiz\u00e1-la"},"content":{"rendered":"\n<p><span style=\"font-weight: 400;\"><strong>A investiga\u00e7\u00e3o experimental<\/strong> \u00e9 qualquer investiga\u00e7\u00e3o conduzida com uma abordagem cient\u00edfica, em que um conjunto de vari\u00e1veis \u00e9 mantido constante, enquanto o outro conjunto de vari\u00e1veis \u00e9 medido como objeto da experi\u00eancia.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">A confirma geralmente que a mudan\u00e7a observada na vari\u00e1vel em estudo se baseia apenas na manipula\u00e7\u00e3o da vari\u00e1vel independente.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">O que \u00e9 a investiga\u00e7\u00e3o experimental?<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">A investiga\u00e7\u00e3o experimental \u00e9 um dos m\u00e9todos de investiga\u00e7\u00e3o quantitativa <\/span><span style=\"font-weight: 400;\">investiga\u00e7\u00e3o quantitativa<\/span><span style=\"font-weight: 400;\"> m\u00e9todos de investiga\u00e7\u00e3o quantitativa.<\/span><span style=\"font-weight: 400;\">Uma verdadeira investiga\u00e7\u00e3o experimental s\u00f3 \u00e9 considerada bem sucedida quando o investigador confirma que uma altera\u00e7\u00e3o na vari\u00e1vel dependente se deve \u00e0 manipula\u00e7\u00e3o da vari\u00e1vel independente.<\/span><span style=\"font-weight: 400;\">\u00c9 importante para a investiga\u00e7\u00e3o experimental estabelecer a causa e o efeito de um fen\u00f3meno, o que significa que deve ser claro que os efeitos observados numa experi\u00eancia se devem \u00e0 causa.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Exemplos de investiga\u00e7\u00e3o experimental<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">O exemplo mais simples de investiga\u00e7\u00e3o de tipo experimental \u00e9 um teste de laborat\u00f3rio.<br>Desde que a investiga\u00e7\u00e3o seja efectuada em condi\u00e7\u00f5es cientificamente aceit\u00e1veis, pode ser considerada uma investiga\u00e7\u00e3o experimental. <\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Naturalmente, os acontecimentos que ocorrem podem ser confusos e n\u00e3o permitir que os investigadores tirem conclus\u00f5es facilmente.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Por exemplo, um estudante de cardiologia faz uma pesquisa para compreender o efeito da alimenta\u00e7\u00e3o no colesterol e descobre que a maioria dos doentes com problemas card\u00edacos n\u00e3o s\u00e3o vegetarianos e n\u00e3o t\u00eam diabetes, \u00e9 porque comem carne (vamos supor).<br>Este \u00faltimo pode ser um aspeto (causa) que pode levar a um ataque card\u00edaco (efeito). <\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Quando deves realizar uma investiga\u00e7\u00e3o experimental?<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">Qualquer investiga\u00e7\u00e3o efectuada em condi\u00e7\u00f5es cientificamente aceit\u00e1veis utiliza m\u00e9todos experimentais.<br>O sucesso dos estudos experimentais depende de os investigadores confirmarem que a altera\u00e7\u00e3o de uma vari\u00e1vel se baseia unicamente na manipula\u00e7\u00e3o da vari\u00e1vel constante.<br>A investiga\u00e7\u00e3o deve estabelecer uma causa e um efeito percept\u00edveis. <\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Podes fazer essa investiga\u00e7\u00e3o&#8230;<\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Quando o tempo \u00e9 um fator vital para estabelecer uma rela\u00e7\u00e3o entre causa e efeito.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Quando existe um comportamento invariante entre causa e efeito.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Quando a rela\u00e7\u00e3o causa-efeito \u00e9 eminentemente de conveni\u00eancia.<\/span><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Tipos de conce\u00e7\u00e3o de investiga\u00e7\u00e3o experimental<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">Existem tr\u00eas tipos principais de projectos de investiga\u00e7\u00e3o experimental:<\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Conce\u00e7\u00e3o pr\u00e9-experimental<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Design experimental verdadeiro<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Conce\u00e7\u00e3o quase-experimental<\/span><\/li>\n<\/ul>\n\n\n\n<p><span style=\"font-weight: 400;\">Os diferentes tipos de conce\u00e7\u00e3o baseiam-se na forma como o investigador classifica os sujeitos.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">1. &nbsp; Conce\u00e7\u00e3o pr\u00e9-experimental<\/span><\/h3>\n\n\n\n<p><span style=\"font-weight: 400;\">Esta \u00e9 a forma mais simples de conce\u00e7\u00e3o da investiga\u00e7\u00e3o experimental.<br>Um grupo, ou v\u00e1rios grupos de pessoas, s\u00e3o mantidos sob observa\u00e7\u00e3o depois de serem considerados factores de causa e efeito.<br>Normalmente, \u00e9 realizada para perceber se \u00e9 necess\u00e1ria mais investiga\u00e7\u00e3o sobre os grupos-alvo. <\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">A investiga\u00e7\u00e3o pr\u00e9-experimental divide-se em tr\u00eas tipos:<\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">Conce\u00e7\u00e3o da investiga\u00e7\u00e3o de um exemplo.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Conce\u00e7\u00e3o da investiga\u00e7\u00e3o de um grupo<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Compara\u00e7\u00e3o de dois grupos est\u00e1ticos.<\/span><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">2. &nbsp; Design experimental verdadeiro<\/span><\/h3>\n\n\n\n<p><span style=\"font-weight: 400;\">Este tipo de conce\u00e7\u00e3o \u00e9 a forma mais precisa de conce\u00e7\u00e3o de investiga\u00e7\u00e3o experimental, uma vez que se baseia na an\u00e1lise estat\u00edstica para provar ou refutar uma hip\u00f3tese.<br>\u00c9 o \u00fanico tipo de desenho experimental que pode estabelecer uma rela\u00e7\u00e3o de causa e efeito dentro de um ou v\u00e1rios grupos.<br>Neste tipo de conce\u00e7\u00e3o, h\u00e1 tr\u00eas factores a ter em conta: <\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Grupos: Grupo de controlo e grupo experimental<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Vari\u00e1vel: que pode ser manipulada pelo investigador.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Distribui\u00e7\u00e3o: aleat\u00f3ria<\/span><\/li>\n<\/ul>\n\n\n\n<p><span style=\"font-weight: 400;\">Este m\u00e9todo de investiga\u00e7\u00e3o experimental \u00e9 habitualmente utilizado nas ci\u00eancias f\u00edsicas.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">3.- Conce\u00e7\u00e3o quase-experimental<\/span><\/h3>\n\n\n\n<p><span style=\"font-weight: 400;\">A palavra &#8220;quasi&#8221; indica semelhan\u00e7a.<br>Um projeto de investiga\u00e7\u00e3o quase-experimental \u00e9 semelhante ao experimental, s\u00e3o quase iguais.<br>A diferen\u00e7a entre os dois \u00e9 a atribui\u00e7\u00e3o de um grupo de controlo. <\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\"><br><\/span><span style=\"font-weight: 400;\">Nesta conce\u00e7\u00e3o de investiga\u00e7\u00e3o, \u00e9 manipulada uma vari\u00e1vel independente, mas os participantes de um grupo n\u00e3o s\u00e3o atribu\u00eddos aleatoriamente.<br>A vari\u00e1vel independente \u00e9 manipulada antes de a vari\u00e1vel dependente ser calculada, pelo que o problema da direccionalidade \u00e9 eliminado.<br>A quase-investiga\u00e7\u00e3o \u00e9 utilizada em contextos de campo em que a atribui\u00e7\u00e3o aleat\u00f3ria \u00e9 irrelevante ou n\u00e3o \u00e9 necess\u00e1ria. <\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Vantagens da investiga\u00e7\u00e3o experimental<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">\u00c9 vital testar novas ideias ou teorias, pelo que podes utilizar este tipo de investiga\u00e7\u00e3o antes de tomares uma decis\u00e3o.<br>Eis algumas das vantagens de realizar este tipo de investiga\u00e7\u00e3o: <\/span><\/p>\n\n\n\n<ul>\n<li><span style=\"font-weight: 400;\">Os investigadores t\u00eam um maior controlo sobre as vari\u00e1veis para obter os resultados desejados.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">O sujeito ou a ind\u00fastria n\u00e3o t\u00eam qualquer influ\u00eancia na efic\u00e1cia da investiga\u00e7\u00e3o experimental.<br>Qualquer ind\u00fastria pode aplic\u00e1-lo para fins de investiga\u00e7\u00e3o. <\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Os resultados s\u00e3o concretos.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Depois de analisares os resultados, podes aplicar as tuas conclus\u00f5es a ideias ou situa\u00e7\u00f5es semelhantes.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Consegue identificar a causa e o efeito de uma hip\u00f3tese.<br>Os investigadores podem analisar mais aprofundadamente esta rela\u00e7\u00e3o para determinar conhecimentos mais profundos. <\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">A investiga\u00e7\u00e3o de tipo experimental \u00e9 um ponto de partida ideal.<br>Os dados que recolhes s\u00e3o uma base sobre a qual podes construir novas ideias e realizar mais investiga\u00e7\u00e3o. <\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Este tipo de investiga\u00e7\u00e3o pode ser utilizado em associa\u00e7\u00e3o com outros m\u00e9todos de investiga\u00e7\u00e3o.&nbsp;<\/span><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-weight: 400;\">Conclus\u00e3o<\/span><\/h2>\n\n\n\n<p><span style=\"font-weight: 400;\">A investiga\u00e7\u00e3o experimental \u00e9 a melhor forma de descobrir, por exemplo, como \u00e9 que o p\u00fablico vai reagir a um novo produto ou se um determinado alimento aumenta a probabilidade de uma doen\u00e7a.&nbsp;<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Se queres realizar uma pesquisa e queres recolher dados online, o <a href=\"https:\/\/www.questionpro.com\/pt\/\">QuestionPro<\/a> tem as ferramentas para te ajudar.<br>Solicita uma demonstra\u00e7\u00e3o e fica a conhecer todas as nossas funcionalidades. <\/span><\/p>\n\n\n\n<br>\n<center>\n<a href=\"https:\/\/eu.questionpro.com\/a\/showEntry.do?lan=pt_PT&#038;custom1=blog\">\n        <button style=\"background: #ff9f00\">Cria uma conta gratuita<\/button>\n    <\/a>\n    <a href=\"https:\/\/contactar.questionpro.com\/t\/AM4X9Z3LxD?custom1=investigacao-experimental-o-que-e-tipos-e-como-realiza-la\" target=\"_blank\" rel=\"noopener\">\n        <button>Agendar uma demonstra\u00e7\u00e3o<\/button>\n    <\/a>\n<\/center>\n<br>\n","protected":false},"excerpt":{"rendered":"<p>A investiga\u00e7\u00e3o experimental \u00e9 qualquer investiga\u00e7\u00e3o conduzida com uma abordagem cient\u00edfica, em que um conjunto de vari\u00e1veis \u00e9 mantido constante, [&hellip;]<\/p>\n","protected":false},"author":38,"featured_media":981054,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[2140],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O que \u00e9 a investiga\u00e7\u00e3o experimental?<\/title>\n<meta name=\"description\" content=\"Aprende o que \u00e9 a investiga\u00e7\u00e3o experimental e os tipos que existem. 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