{"id":28669,"date":"2023-07-18T10:31:35","date_gmt":"2023-07-18T13:31:35","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/scientific-prediction-copy\/"},"modified":"2023-07-18T10:37:02","modified_gmt":"2023-07-18T13:37:02","slug":"extraneous-variables","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/sk\/cudzie-premenne\/","title":{"rendered":"Cudzie premenn\u00e9 vo v\u00fdskume: Regul\u00e1cia potenci\u00e1lnych vplyvov"},"content":{"rendered":"<p>Kontrola premenn\u00fdch je vo vedeckom v\u00fdskume nevyhnutn\u00e1 na zabezpe\u010denie platnosti a spo\u013eahlivosti v\u00fdsledkov. Aj tie najprec\u00edznej\u0161ie pripraven\u00e9 \u0161t\u00fadie v\u0161ak m\u00f4\u017eu by\u0165 ovplyvnen\u00e9 vonkaj\u0161\u00edmi premenn\u00fdmi, ktor\u00e9 nie s\u00fa z\u00e1merne manipulovan\u00e9 alebo zoh\u013ead\u0148ovan\u00e9, ale napriek tomu m\u00f4\u017eu ovplyvni\u0165 z\u00e1very v\u00fdskumu. Cudzie premenn\u00e9 m\u00f4\u017eu prispie\u0165 k nespr\u00e1vnym v\u00fdsledkom, zl\u00fdm progn\u00f3zam a nedostato\u010dnej opakovate\u013enosti v\u00fdskumu.&nbsp;<\/p>\n\n\n\n<p>V tomto \u010dl\u00e1nku si preberieme v\u0161etky relevantn\u00e9 inform\u00e1cie t\u00fdkaj\u00face sa cudz\u00edch premenn\u00fdch, pre\u010do s\u00fa d\u00f4le\u017eit\u00e9 a s ak\u00fdmi typmi sa m\u00f4\u017eete stretn\u00fa\u0165 pri vykon\u00e1van\u00ed v\u00fdskumu.&nbsp;<\/p>\n\n\n\n<h2 id=\"h-what-are-extraneous-variables\">\u010co s\u00fa cudzie premenn\u00e9?<\/h2>\n\n\n\n<p>Cudzia premenn\u00e1 je premenn\u00e1, ktor\u00e1 nie je vo vedeckej \u0161t\u00fadii cielene manipulovan\u00e1 alebo kontrolovan\u00e1, ale napriek tomu m\u00f4\u017ee ma\u0165 vplyv na z\u00e1very \u0161t\u00fadie. Maj\u00fa schopnos\u0165 zamie\u0148a\u0165 alebo skres\u013eova\u0165 premenn\u00e9, pri\u010dom ovplyv\u0148uj\u00fa najm\u00e4 z\u00e1visl\u00fa premenn\u00fa (premenn\u00e9).<\/p>\n\n\n\n<p>To m\u00f4\u017ee ohrozi\u0165 platnos\u0165 \u0161t\u00fadie a naru\u0161i\u0165 schopnos\u0165 vyvodi\u0165 pr\u00edslu\u0161n\u00e9 z\u00e1very alebo urobi\u0165 rozsiahle zov\u0161eobecnenia na z\u00e1klade zisten\u00ed. Aby v\u00fdskumn\u00edci zabezpe\u010dili spo\u013eahlivos\u0165 a platnos\u0165 svojich zisten\u00ed, musia starostlivo analyzova\u0165 a kontrolova\u0165 cudzie premenn\u00e9.<\/p>\n\n\n\n<p>Cudzie premenn\u00e9 m\u00f4\u017eu ma\u0165 r\u00f4zne pr\u00ed\u010diny vr\u00e1tane rozdielov medzi \u00fa\u010dastn\u00edkmi, zmien v experiment\u00e1lnom prostred\u00ed alebo okolnostiach a nekontrolovan\u00fdch vplyvov prostredia.&nbsp;<\/p>\n\n\n\n<h2 id=\"h-why-are-extraneous-variables-important\">Pre\u010do s\u00fa cudzie premenn\u00e9 d\u00f4le\u017eit\u00e9?<\/h2>\n\n\n\n<p>Cudzie premenn\u00e9 s\u00fa d\u00f4le\u017eit\u00e9, preto\u017ee m\u00f4\u017eu ma\u0165 zna\u010dn\u00fd vplyv na v\u00fdsledok vedeck\u00e9ho v\u00fdskumu t\u00fdm, \u017ee m\u00f4\u017eu skresli\u0165 a ovplyvni\u0165 z\u00e1visl\u00fa premenn\u00fa (premenn\u00e9).&nbsp;<\/p>\n\n\n\n<p>Cudzie premenn\u00e9, ako u\u017e bolo uveden\u00e9, m\u00f4\u017eu vies\u0165 k chybn\u00fdm alebo zav\u00e1dzaj\u00facim v\u00fdsledkom, ak sa neidentifikuj\u00fa a nezoh\u013eadnia, \u010do m\u00f4\u017ee ma\u0165 z\u00e1sadn\u00e9 d\u00f4sledky pre \u010fal\u0161\u00ed v\u00fdskum a re\u00e1lne aplik\u00e1cie.<\/p>\n\n\n\n<p>Cudzie premenn\u00e9 m\u00f4\u017eu sp\u00f4sobi\u0165 skreslenie, ako napr\u00edklad:<\/p>\n\n\n\n<ul>\n<li><strong>Skreslenie \u00fabytku:<\/strong> Vyskytuje sa vtedy, ke\u010f sa \u00fa\u010dastn\u00edci v\u00fdskumu, ktor\u00ed odch\u00e1dzaj\u00fa, systematicky l\u00ed\u0161ia od t\u00fdch, ktor\u00ed zost\u00e1vaj\u00fa;<\/li>\n\n\n\n<li><strong>Predpojatos\u0165 z nedostato\u010dn\u00e9ho krytia: <\/strong>Nast\u00e1va vtedy, ke\u010f vo vzorke nie je zast\u00fapen\u00fd ur\u010dit\u00fd druh jedinca z va\u0161ej popul\u00e1cie;<\/li>\n\n\n\n<li><strong>Neodpovedanie na ot\u00e1zky:<\/strong> Vyskytuje sa vtedy, ke\u010f sa t\u00ed, ktor\u00ed na prieskum neodpovedali, v\u00fdrazne l\u00ed\u0161ia od t\u00fdch, ktor\u00ed odpovedali;<\/li>\n\n\n\n<li><a href=\"https:\/\/mindthegraph.com\/blog\/sampling-bias\/\"><strong>Skreslenie v\u00fdberu vzorky<\/strong><\/a><strong>, zn\u00e1me aj ako skreslenie zistenia:<\/strong> Vyskytuje sa vtedy, ke\u010f je pravdepodobnos\u0165, \u017ee niektor\u00ed \u010dlenovia cie\u013eovej skupiny bud\u00fa zahrnut\u00ed, ni\u017e\u0161ia ako u in\u00fdch;<\/li>\n\n\n\n<li><strong>Predsudok o pre\u017eit\u00ed:<\/strong> Vyskytuje sa vtedy, ke\u010f v\u00fdskumn\u00edci stanovuj\u00fa zistenia len na z\u00e1klade pr\u00edpadov \u00faspe\u0161n\u00fdch \u013eud\u00ed, a nie na z\u00e1klade celej skupiny.<\/li>\n<\/ul>\n\n\n\n<p>V\u00fdskumn\u00edci m\u00f4\u017eu pom\u00f4c\u0165 zabezpe\u010di\u0165 platnos\u0165 a spo\u013eahlivos\u0165 svojich zisten\u00ed spr\u00e1vnou identifik\u00e1ciou a \u00fapravou cudz\u00edch premenn\u00fdch. To zah\u0155\u0148a zn\u00ed\u017eenie alebo odstr\u00e1nenie \u00fa\u010dinkov cudz\u00edch premenn\u00fdch, a to bu\u010f experiment\u00e1lnym pl\u00e1nom (napr. n\u00e1hodn\u00fdm v\u00fdberom, vyv\u00e1\u017een\u00edm) alebo \u0161tatistickou anal\u00fdzou. (napr. zahrnutie cudz\u00edch premenn\u00fdch ako kovari\u00e1t). V\u00fdskumn\u00ed pracovn\u00edci tak m\u00f4\u017eu zv\u00fd\u0161i\u0165 svoju d\u00f4veru vo v\u00fdsledky \u0161t\u00fadie a poskytn\u00fa\u0165 vedeckej komunite presnej\u0161ie a hodnotnej\u0161ie inform\u00e1cie.<\/p>\n\n\n\n<h2 id=\"h-what-are-the-types-of-extraneous-variables\">Ak\u00e9 s\u00fa typy cudz\u00edch premenn\u00fdch?<\/h2>\n\n\n\n<p>Existuj\u00fa r\u00f4zne druhy cudz\u00edch premenn\u00fdch, ktor\u00e9 m\u00f4\u017eu ovplyvni\u0165 v\u00fdsledok vedeck\u00e9ho v\u00fdskumu. Toto je nieko\u013eko pr\u00edkladov:<\/p>\n\n\n\n<h3 id=\"h-demand-characteristics-variable\">Premenn\u00e1 charakteristika dopytu<\/h3>\n\n\n\n<p>Typ vonkaj\u0161ej premennej, ktor\u00e1 vznik\u00e1, ke\u010f \u00fa\u010dastn\u00edci v\u00fdskumu menia svoje spr\u00e1vanie alebo reakcie v d\u00f4sledku podnetov alebo o\u010dak\u00e1van\u00ed, ktor\u00e9 im dod\u00e1va samotn\u00fd experiment. Napr\u00edklad, ak \u00fa\u010dastn\u00edci c\u00edtia, \u017ee sa od nich o\u010dak\u00e1va, \u017ee sa bud\u00fa spr\u00e1va\u0165 alebo reagova\u0165 ur\u010dit\u00fdm sp\u00f4sobom, m\u00f4\u017eu svoje spr\u00e1vanie primerane upravi\u0165.<\/p>\n\n\n\n<h3 id=\"h-situational-variables\">Situa\u010dn\u00e9 premenn\u00e9<\/h3>\n\n\n\n<p>Tieto str\u00e1nky<strong> <\/strong>s\u00fa vonkaj\u0161ie premenn\u00e9, ktor\u00e9 sa vyskytuj\u00fa v d\u00f4sledku prvkov experiment\u00e1lneho prostredia alebo prostredia. Vplyv na v\u00fdsledky \u0161t\u00fadie m\u00f4\u017eu ma\u0165 napr\u00edklad zmeny teploty, osvetlenia alebo \u00farovne hluku, ako aj pr\u00edtomnos\u0165 in\u00fdch os\u00f4b alebo ru\u0161iv\u00fdch vplyvov v okol\u00ed.<\/p>\n\n\n\n<h3 id=\"h-participant-variables\">Premenn\u00e9 \u00fa\u010dastn\u00edkov<\/h3>\n\n\n\n<p>Individu\u00e1lne rozdiely medzi \u00fa\u010dastn\u00edkmi, ktor\u00e9, ak sa nezoh\u013eadnia, m\u00f4\u017eu ma\u0165 vplyv na v\u00fdsledky v\u00fdskumu. Do \u00favahy mo\u017eno bra\u0165 demografick\u00e9 charakteristiky, ako je vek, pohlavie a etnick\u00fd p\u00f4vod, ako aj psychologick\u00e9 charakteristiky, ako s\u00fa osobnostn\u00e9 \u010drty, kognit\u00edvne schopnosti alebo n\u00e1lada.<\/p>\n\n\n\n<h3 id=\"h-experimenter-variable\">Premenn\u00e1 experiment\u00e1tora<\/h3>\n\n\n\n<p>Premenn\u00e9 experiment\u00e1tora s\u00fa rozdelen\u00e9 do dvoch kateg\u00f3ri\u00ed. Prvou je, \u017ee interakcie experiment\u00e1torov s \u00fa\u010dastn\u00edkmi m\u00f4\u017eu ne\u00famyselne ovplyvni\u0165 ich spr\u00e1vanie, \u010do je analogick\u00e9 premennej charakteristiky dopytu. Druh\u00fdm faktorom je potenci\u00e1lne skreslenie sp\u00f4soben\u00e9 experiment\u00e1torom pri meran\u00ed, pozorovan\u00ed, anal\u00fdze alebo interpret\u00e1cii, ktor\u00e9 m\u00f4\u017ee zmeni\u0165 v\u00fdsledky \u0161t\u00fadie.<\/p>\n\n\n\n<h3 id=\"h-methodological-variables\">Metodick\u00e9 premenn\u00e9<\/h3>\n\n\n\n<p>Odch\u00fdlky v technike alebo postupoch v\u00fdskumu, ako s\u00fa odch\u00fdlky v merac\u00edch zariadeniach alebo met\u00f3dach zberu \u00fadajov, m\u00f4\u017eu by\u0165 vonkaj\u0161\u00edmi premenn\u00fdmi, ktor\u00e9 ovplyv\u0148uj\u00fa z\u00e1very.<\/p>\n\n\n\n<h3 id=\"h-time-variables\">\u010casov\u00e9 premenn\u00e9<\/h3>\n\n\n\n<p>\u010casov\u00e9 premenn\u00e9, ako napr\u00edklad denn\u00e1 doba alebo de\u0148 v t\u00fd\u017edni, m\u00f4\u017eu by\u0165 vonkaj\u0161\u00edmi faktormi, ktor\u00e9 ovplyv\u0148uj\u00fa v\u00fdsledky v\u00fdskumu.<\/p>\n\n\n\n<h3 id=\"h-task-variables\">Premenn\u00e9 \u00falohy<\/h3>\n\n\n\n<p>Charakteristiky \u00falohy alebo podnetu pou\u017eit\u00e9ho v \u0161t\u00fadii, ako je jeho n\u00e1ro\u010dnos\u0165 alebo zn\u00e1mos\u0165, m\u00f4\u017eu by\u0165 vonkaj\u0161\u00edmi premenn\u00fdmi, ktor\u00e9 ovplyv\u0148uj\u00fa v\u00fdsledky \u0161t\u00fadie.<\/p>\n\n\n\n<h2 id=\"h-how-to-control-extraneous-variables\">Ako kontrolova\u0165 cudzie premenn\u00e9?<\/h2>\n\n\n\n<p>Tu je nieko\u013eko jednoduch\u00fdch krokov, ktor\u00e9 m\u00f4\u017eu v\u00fdskumn\u00edci podnikn\u00fa\u0165 na kontrolu nekontrolovate\u013en\u00fdch premenn\u00fdch:<\/p>\n\n\n\n<h3>1. Identifikujte potenci\u00e1lne nepotrebn\u00e9 premenn\u00e9<\/h3>\n\n\n\n<p>V\u00fdskumn\u00edci by mali starostlivo analyzova\u0165 v\u0161etky potenci\u00e1lne faktory, ktor\u00e9 by mohli ma\u0165 vplyv na v\u00fdsledky \u0161t\u00fadie, a identifikova\u0165 tie, ktor\u00e9 s\u00fa ved\u013eaj\u0161ie.<\/p>\n\n\n\n<h3>2. Met\u00f3da kontroly<\/h3>\n\n\n\n<p>Po identifik\u00e1cii cudz\u00edch premenn\u00fdch ovplyv\u0148uj\u00facich va\u0161u \u0161t\u00fadiu si m\u00f4\u017eete vybra\u0165 met\u00f3du kontroly. Met\u00f3dy s\u00fa spojen\u00e9 s ur\u010ditou kateg\u00f3riou premenn\u00fdch, \u010do zjednodu\u0161uje v\u00fdber techniky, ktor\u00fa chcete pou\u017ei\u0165. Medzi met\u00f3dy kontroly patria nasleduj\u00face:<\/p>\n\n\n\n<h4 id=\"h-standardized-procedures\">\u0160tandardizovan\u00e9 postupy<\/h4>\n\n\n\n<p>Tento pr\u00edstup sa t\u00fdka situa\u010dn\u00fdch, \u010dasov\u00fdch, \u00falohov\u00fdch a dopytov\u00fdch charakterist\u00edk, ktor\u00e9 sa objavuj\u00fa v celom n\u00e1vrhu \u0161t\u00fadie. Vytvorte \u0161tandardn\u00e9 opatrenia pre konzistentn\u00e9 prostredie pre v\u0161etk\u00fdch \u00fa\u010dastn\u00edkov.<\/p>\n\n\n\n<h4 id=\"h-counterbalancing\">Vyva\u017eovanie<\/h4>\n\n\n\n<p>Tento pr\u00edstup s\u00favis\u00ed s premenn\u00fdmi \u00fa\u010dastn\u00edkov, ako je napr\u00edklad \u0161pecifick\u00e9 poradie udalost\u00ed v \u0161t\u00fadii. Aby ste to zoh\u013eadnili, m\u00f4\u017eete da\u0165 pokyn jednej skupine \u00fa\u010dastn\u00edkov, aby dokon\u010dila ur\u010dit\u00fa \u010das\u0165, zatia\u013e \u010do in\u00e1 skupina dokon\u010d\u00ed in\u00fa \u010das\u0165.<\/p>\n\n\n\n<h4 id=\"h-random-sampling\">N\u00e1hodn\u00fd v\u00fdber vzorky<\/h4>\n\n\n\n<p>Tento pr\u00edstup s\u00favis\u00ed s premenn\u00fdmi \u00fa\u010dastn\u00edkov a zabezpe\u010duje, \u017ee v\u0161etci \u00fa\u010dastn\u00edci maj\u00fa rovnak\u00fa pravdepodobnos\u0165 v\u00fdberu. Napr\u00edklad pri rozdelen\u00ed \u013eud\u00ed do kontrolnej a experiment\u00e1lnej skupiny m\u00f4\u017eete men\u00e1 losova\u0165 n\u00e1hodne, aby ste zabezpe\u010dili, \u017ee ka\u017ed\u00fd jednotlivec m\u00e1 rovnak\u00fa \u0161ancu by\u0165 v ktorejko\u013evek skupine.<\/p>\n\n\n\n<h4 id=\"h-masking\">Maskovanie<\/h4>\n\n\n\n<p>Tento pr\u00edstup sa t\u00fdka premenn\u00fdch experiment\u00e1tora. Maskovanie znamen\u00e1, \u017ee experiment vykon\u00e1va niekto, kto nevie o cieli \u0161t\u00fadie.<\/p>\n\n\n\n<h2 id=\"h-the-world-s-largest-scientifically-accurate-illustrations-gallery\">Najv\u00e4\u010d\u0161ia gal\u00e9ria vedecky presn\u00fdch ilustr\u00e1ci\u00ed na svete<\/h2>\n\n\n\n<p><a href=\"https:\/\/mindthegraph.com\" target=\"_blank\" rel=\"noreferrer noopener\">Mind the Graph<\/a> je najv\u00e4\u010d\u0161ia vedecky presn\u00e1 ilustra\u010dn\u00e1 gal\u00e9ria na svete pln\u00e1 ilustr\u00e1ci\u00ed a grafov z mnoh\u00fdch vedn\u00fdch odborov, ako je biol\u00f3gia, ch\u00e9mia, fyzika a \u010fal\u0161ie. Jednoduch\u00e9 pou\u017e\u00edvanie a fantastick\u00e9 na zlep\u0161enie kvality va\u0161ej pr\u00e1ce!<\/p>\n\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"394\" src=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2022\/12\/3yuqz9n9m78.gif\" alt=\"\" class=\"wp-image-25763\"\/><\/figure><\/div>\n\n\n<div style=\"height:21px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"is-layout-flex wp-block-buttons\">\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/mindthegraph.com\/\" style=\"border-radius:50px;background-color:#dc1866\" target=\"_blank\" rel=\"noreferrer noopener\">Za\u010dnite tvori\u0165 s Mind the Graph<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:44px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Z\u00edskajte inform\u00e1cie o cudz\u00edch premenn\u00fdch vo v\u00fdskume a sp\u00f4soboch ich kontroly, aby ste zv\u00fd\u0161ili vn\u00fatorn\u00fa platnos\u0165 svojho v\u00fdskumu.<\/p>","protected":false},"author":28,"featured_media":28672,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.9 - 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