{"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\/hu\/extraneous-variables\/","title":{"rendered":"K\u00fcls\u0151 v\u00e1ltoz\u00f3k a kutat\u00e1sban: A lehets\u00e9ges hat\u00e1sok szab\u00e1lyoz\u00e1sa"},"content":{"rendered":"<p>A v\u00e1ltoz\u00f3k kontroll\u00e1l\u00e1sa elengedhetetlen a tudom\u00e1nyos kutat\u00e1sban az eredm\u00e9nyek \u00e9rv\u00e9nyess\u00e9g\u00e9nek \u00e9s megb\u00edzhat\u00f3s\u00e1g\u00e1nak biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben. M\u00e9g a legpontosabban el\u0151k\u00e9sz\u00edtett tanulm\u00e1nyokat is befoly\u00e1solhatj\u00e1k azonban olyan k\u00fcls\u0151 v\u00e1ltoz\u00f3k, amelyeket nem sz\u00e1nd\u00e9kosan manipul\u00e1lnak vagy nem vesznek figyelembe, de ennek ellen\u00e9re befoly\u00e1solhatj\u00e1k a kutat\u00e1si k\u00f6vetkeztet\u00e9seket. A k\u00fcls\u0151 v\u00e1ltoz\u00f3k hozz\u00e1j\u00e1rulhatnak a hib\u00e1s eredm\u00e9nyekhez, a rossz el\u0151rejelz\u00e9sekhez \u00e9s a kutat\u00e1s megism\u00e9telhet\u0151s\u00e9g\u00e9nek hi\u00e1ny\u00e1hoz.&nbsp;<\/p>\n\n\n\n<p>Ez a cikk a k\u00fcls\u0151 v\u00e1ltoz\u00f3kkal kapcsolatos \u00f6sszes l\u00e9nyeges inform\u00e1ci\u00f3t ismerteti, hogy mi\u00e9rt fontosak, \u00e9s milyen t\u00edpusokkal szembes\u00fclhet a kutat\u00e1s sor\u00e1n.&nbsp;<\/p>\n\n\n\n<h2 id=\"h-what-are-extraneous-variables\">Mik azok az idegen v\u00e1ltoz\u00f3k?<\/h2>\n\n\n\n<p>Az idegen v\u00e1ltoz\u00f3 olyan v\u00e1ltoz\u00f3, amelyet nem c\u00e9lzottan manipul\u00e1lnak vagy ellen\u0151riznek egy tudom\u00e1nyos vizsg\u00e1latban, de ennek ellen\u00e9re befoly\u00e1solhatja a vizsg\u00e1lat k\u00f6vetkeztet\u00e9s\u00e9t. K\u00e9pesek \u00f6sszezavarni vagy torz\u00edtani a v\u00e1ltoz\u00f3kat, \u00e9s els\u0151sorban a f\u00fcgg\u0151 v\u00e1ltoz\u00f3(ka)t befoly\u00e1solj\u00e1k.<\/p>\n\n\n\n<p>Ez vesz\u00e9lyeztetheti a tanulm\u00e1ny \u00e9rv\u00e9nyess\u00e9g\u00e9t, \u00e9s ronthatja a megfelel\u0151 k\u00f6vetkeztet\u00e9sek levon\u00e1s\u00e1nak vagy az eredm\u00e9nyeken alapul\u00f3 sz\u00e9lesk\u00f6r\u0171 \u00e1ltal\u00e1nos\u00edt\u00e1soknak a k\u00e9pess\u00e9g\u00e9t. Meg\u00e1llap\u00edt\u00e1saik megb\u00edzhat\u00f3s\u00e1g\u00e1nak \u00e9s \u00e9rv\u00e9nyess\u00e9g\u00e9nek biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben a kutat\u00f3knak gondosan elemezni\u00fck \u00e9s ellen\u0151rizni\u00fck kell a k\u00fcls\u0151 v\u00e1ltoz\u00f3kat.<\/p>\n\n\n\n<p>A k\u00fcls\u0151 v\u00e1ltoz\u00f3k sz\u00e1mos okb\u00f3l sz\u00e1rmazhatnak, bele\u00e9rtve a r\u00e9sztvev\u0151k k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9geket, a k\u00eds\u00e9rleti k\u00f6rnyezetben vagy k\u00f6r\u00fclm\u00e9nyekben bek\u00f6vetkez\u0151 v\u00e1ltoz\u00e1sokat \u00e9s az ellen\u0151rizetlen k\u00f6rnyezeti hat\u00e1sokat.&nbsp;<\/p>\n\n\n\n<h2 id=\"h-why-are-extraneous-variables-important\">Mi\u00e9rt fontosak az idegen v\u00e1ltoz\u00f3k?<\/h2>\n\n\n\n<p>A k\u00fcls\u0151 v\u00e1ltoz\u00f3k az\u00e9rt fontosak, mert jelent\u0151s hat\u00e1ssal lehetnek a tudom\u00e1nyos kutat\u00e1s eredm\u00e9ny\u00e9re az\u00e1ltal, hogy esetleg torz\u00edtj\u00e1k \u00e9s befoly\u00e1solj\u00e1k a f\u00fcgg\u0151 v\u00e1ltoz\u00f3(ka)t.&nbsp;<\/p>\n\n\n\n<p>Az idegen v\u00e1ltoz\u00f3k, amint azt kor\u00e1bban eml\u00edtett\u00fck, t\u00e9ves vagy f\u00e9lrevezet\u0151 eredm\u00e9nyekhez vezethetnek, ha nem azonos\u00edtj\u00e1k \u00e9s nem veszik figyelembe \u0151ket, aminek jelent\u0151s k\u00f6vetkezm\u00e9nyei lehetnek a tov\u00e1bbi kutat\u00e1sokban \u00e9s a val\u00f3s alkalmaz\u00e1sokban.<\/p>\n\n\n\n<p>A k\u00fcls\u0151 v\u00e1ltoz\u00f3k torz\u00edt\u00e1st okozhatnak, mint p\u00e9ld\u00e1ul:<\/p>\n\n\n\n<ul>\n<li><strong>T\u00e1voz\u00e1si torz\u00edt\u00e1s:<\/strong> Akkor fordul el\u0151, amikor a kutat\u00e1sban r\u00e9szt vev\u0151k, akik kil\u00e9pnek, szisztematikusan k\u00fcl\u00f6nb\u00f6znek azokt\u00f3l, akik maradnak;<\/li>\n\n\n\n<li><strong>Alulfedetts\u00e9gi torz\u00edt\u00e1s: <\/strong>Akkor fordul el\u0151, ha a mint\u00e1ban nem k\u00e9pviselteti mag\u00e1t a popul\u00e1ci\u00f3 egy bizonyos fajta egyede;<\/li>\n\n\n\n<li><strong>Nemv\u00e1laszol\u00e1si torz\u00edt\u00e1s:<\/strong> Akkor fordul el\u0151, amikor azok, akik nem v\u00e1laszolnak egy felm\u00e9r\u00e9sre, jelent\u0151sen k\u00fcl\u00f6nb\u00f6znek azokt\u00f3l, akik v\u00e1laszolnak;<\/li>\n\n\n\n<li><a href=\"https:\/\/mindthegraph.com\/blog\/sampling-bias\/\"><strong>Mintav\u00e9teli torz\u00edt\u00e1s<\/strong><\/a><strong>, m\u00e1s n\u00e9ven ascertainment bias:<\/strong> Akkor fordul el\u0151, ha a c\u00e9lcsoport egyes tagjai kisebb val\u00f3sz\u00edn\u0171s\u00e9ggel ker\u00fclnek bevon\u00e1sra, mint m\u00e1sok;<\/li>\n\n\n\n<li><strong>T\u00fal\u00e9l\u00e9si torz\u00edt\u00e1s:<\/strong> Akkor fordul el\u0151, amikor a kutat\u00f3k kiz\u00e1r\u00f3lag a sikeres emberek esetein alapul\u00f3 meg\u00e1llap\u00edt\u00e1sokat tesznek, nem pedig az eg\u00e9sz csoporton.<\/li>\n<\/ul>\n\n\n\n<p>A kutat\u00f3k a k\u00fcls\u0151 v\u00e1ltoz\u00f3k helyes azonos\u00edt\u00e1s\u00e1val \u00e9s kiigaz\u00edt\u00e1s\u00e1val seg\u00edthetnek meg\u00e1llap\u00edt\u00e1saik \u00e9rv\u00e9nyess\u00e9g\u00e9nek \u00e9s megb\u00edzhat\u00f3s\u00e1g\u00e1nak biztos\u00edt\u00e1s\u00e1ban. Ez mag\u00e1ban foglalja a k\u00fcls\u0151 v\u00e1ltoz\u00f3k hat\u00e1sainak cs\u00f6kkent\u00e9s\u00e9t vagy kik\u00fcsz\u00f6b\u00f6l\u00e9s\u00e9t, ak\u00e1r k\u00eds\u00e9rleti tervez\u00e9ssel (pl. randomiz\u00e1l\u00e1s, kiegyens\u00falyoz\u00e1s), ak\u00e1r statisztikai elemz\u00e9ssel. (pl. idegen v\u00e1ltoz\u00f3k kovari\u00e1tork\u00e9nt val\u00f3 bevon\u00e1sa). A kutat\u00f3k ezzel n\u00f6velhetik a vizsg\u00e1lat eredm\u00e9nyeibe vetett bizalmukat, \u00e9s pontosabb \u00e9s \u00e9rt\u00e9kesebb inform\u00e1ci\u00f3kat adhatnak a tudom\u00e1nyos k\u00f6z\u00f6ss\u00e9gnek.<\/p>\n\n\n\n<h2 id=\"h-what-are-the-types-of-extraneous-variables\">Melyek a k\u00fcls\u0151 v\u00e1ltoz\u00f3k t\u00edpusai?<\/h2>\n\n\n\n<p>K\u00fcl\u00f6nf\u00e9le k\u00fcls\u0151 v\u00e1ltoz\u00f3k vannak, amelyek esetleg befoly\u00e1solhatj\u00e1k a tudom\u00e1nyos kutat\u00e1s eredm\u00e9ny\u00e9t. \u00cdme n\u00e9h\u00e1ny p\u00e9lda:<\/p>\n\n\n\n<h3 id=\"h-demand-characteristics-variable\">A kereslet jellemz\u0151i v\u00e1ltoz\u00f3<\/h3>\n\n\n\n<p>Egyfajta idegen v\u00e1ltoz\u00f3, amely akkor alakul ki, amikor a kutat\u00e1sban r\u00e9sztvev\u0151k a k\u00eds\u00e9rlet \u00e1ltal adott jelz\u00e9sek vagy elv\u00e1r\u00e1sok hat\u00e1s\u00e1ra m\u00f3dos\u00edtj\u00e1k viselked\u00e9s\u00fcket vagy reakci\u00f3ikat. P\u00e9ld\u00e1ul, ha a r\u00e9sztvev\u0151k \u00fagy \u00e9rzik, hogy elv\u00e1rj\u00e1k t\u0151l\u00fck, hogy egy bizonyos m\u00f3don viselkedjenek vagy reag\u00e1ljanak, akkor viselked\u00e9s\u00fcket ennek megfelel\u0151en m\u00f3dos\u00edthatj\u00e1k.<\/p>\n\n\n\n<h3 id=\"h-situational-variables\">Helyzeti v\u00e1ltoz\u00f3k<\/h3>\n\n\n\n<p>Ezek a<strong> <\/strong>olyan k\u00fcls\u0151 v\u00e1ltoz\u00f3k, amelyek a k\u00eds\u00e9rleti k\u00f6rnyezet vagy k\u00f6rnyezet elemei miatt fordulnak el\u0151. A h\u0151m\u00e9rs\u00e9klet, a megvil\u00e1g\u00edt\u00e1s vagy a zajszint v\u00e1ltoz\u00e1sa p\u00e9ld\u00e1ul befoly\u00e1solhatja a vizsg\u00e1lati eredm\u00e9nyeket, ak\u00e1rcsak m\u00e1s szem\u00e9lyek vagy zavar\u00f3 t\u00e9nyez\u0151k jelenl\u00e9te a k\u00f6rnyezetben.<\/p>\n\n\n\n<h3 id=\"h-participant-variables\">R\u00e9sztvev\u0151i v\u00e1ltoz\u00f3k<\/h3>\n\n\n\n<p>A r\u00e9sztvev\u0151k k\u00f6z\u00f6tti egy\u00e9ni elt\u00e9r\u00e9sek, amelyek, ha nem veszik figyelembe, befoly\u00e1solhatj\u00e1k a kutat\u00e1si eredm\u00e9nyeket. Figyelembe vehet\u0151k az olyan demogr\u00e1fiai jellemz\u0151k, mint az \u00e9letkor, a nem \u00e9s az etnikai hovatartoz\u00e1s, valamint az olyan pszichol\u00f3giai jellemz\u0151k, mint a szem\u00e9lyis\u00e9gjegyek, a kognit\u00edv k\u00e9pess\u00e9gek vagy a hangulat.<\/p>\n\n\n\n<h3 id=\"h-experimenter-variable\">K\u00eds\u00e9rleti v\u00e1ltoz\u00f3<\/h3>\n\n\n\n<p>A k\u00eds\u00e9rleti v\u00e1ltoz\u00f3kat k\u00e9t kateg\u00f3ri\u00e1ba soroljuk. Az els\u0151 az, hogy a k\u00eds\u00e9rletez\u0151k \u00e9s a r\u00e9sztvev\u0151k interakci\u00f3i v\u00e9letlen\u00fcl befoly\u00e1solhatj\u00e1k a r\u00e9sztvev\u0151k viselked\u00e9s\u00e9t, ami anal\u00f3g a keresleti jellemz\u0151k v\u00e1ltoz\u00f3val. A m\u00e1sodik t\u00e9nyez\u0151 a k\u00eds\u00e9rletvezet\u0151 \u00e1ltal a m\u00e9r\u00e9s, megfigyel\u00e9s, elemz\u00e9s vagy \u00e9rtelmez\u00e9s sor\u00e1n okozott esetleges torz\u00edt\u00e1s, amely megv\u00e1ltoztathatja a vizsg\u00e1lat eredm\u00e9nyeit.<\/p>\n\n\n\n<h3 id=\"h-methodological-variables\">M\u00f3dszertani v\u00e1ltoz\u00f3k<\/h3>\n\n\n\n<p>A kutat\u00e1s technik\u00e1j\u00e1nak vagy folyamatainak elt\u00e9r\u00e9sei, p\u00e9ld\u00e1ul a m\u00e9r\u0151berendez\u00e9sek vagy az adatgy\u0171jt\u00e9si m\u00f3dszerek elt\u00e9r\u00e9sei olyan k\u00fcls\u0151 v\u00e1ltoz\u00f3k lehetnek, amelyek befoly\u00e1solj\u00e1k a k\u00f6vetkeztet\u00e9seket.<\/p>\n\n\n\n<h3 id=\"h-time-variables\">Id\u0151v\u00e1ltoz\u00f3k<\/h3>\n\n\n\n<p>Az id\u0151beli v\u00e1ltoz\u00f3k, mint p\u00e9ld\u00e1ul a napszak vagy a h\u00e9t napja, olyan k\u00fcls\u0151 t\u00e9nyez\u0151k lehetnek, amelyek befoly\u00e1solj\u00e1k a kutat\u00e1si eredm\u00e9nyeket.<\/p>\n\n\n\n<h3 id=\"h-task-variables\">Feladatv\u00e1ltoz\u00f3k<\/h3>\n\n\n\n<p>A vizsg\u00e1latban haszn\u00e1lt feladat vagy inger jellemz\u0151i, mint p\u00e9ld\u00e1ul a neh\u00e9zs\u00e9g vagy az ismerts\u00e9g, olyan k\u00fcls\u0151 v\u00e1ltoz\u00f3k lehetnek, amelyek befoly\u00e1solj\u00e1k a vizsg\u00e1lati eredm\u00e9nyeket.<\/p>\n\n\n\n<h2 id=\"h-how-to-control-extraneous-variables\">Hogyan lehet ellen\u0151rizni a k\u00fcls\u0151 v\u00e1ltoz\u00f3kat?<\/h2>\n\n\n\n<p>\u00cdme n\u00e9h\u00e1ny egyszer\u0171 l\u00e9p\u00e9s, amelyet a kutat\u00f3k a nem ellen\u0151rizhet\u0151 v\u00e1ltoz\u00f3k ellen\u0151rz\u00e9s\u00e9re tehetnek:<\/p>\n\n\n\n<h3>1. A lehets\u00e9ges felesleges v\u00e1ltoz\u00f3k azonos\u00edt\u00e1sa<\/h3>\n\n\n\n<p>A kutat\u00f3knak gondosan elemezni\u00fck kell minden olyan lehets\u00e9ges t\u00e9nyez\u0151t, amely hat\u00e1ssal lehet a tanulm\u00e1ny meg\u00e1llap\u00edt\u00e1saira, \u00e9s azonos\u00edtaniuk kell azokat, amelyek idegenek.<\/p>\n\n\n\n<h3>2. Vez\u00e9rl\u00e9si m\u00f3dszer<\/h3>\n\n\n\n<p>Miut\u00e1n azonos\u00edtotta a vizsg\u00e1latot befoly\u00e1sol\u00f3 k\u00fcls\u0151 v\u00e1ltoz\u00f3kat, v\u00e1laszthat egy ellen\u0151rz\u00e9si m\u00f3dszert. A m\u00f3dszerek a v\u00e1ltoz\u00f3k egy bizonyos kateg\u00f3ri\u00e1j\u00e1hoz kapcsol\u00f3dnak, \u00edgy egyszer\u0171en kiv\u00e1laszthatja, hogy melyik technik\u00e1t alkalmazza. A kontrollm\u00f3dszerek k\u00f6z\u00e9 tartoznak a k\u00f6vetkez\u0151k:<\/p>\n\n\n\n<h4 id=\"h-standardized-procedures\">Szabv\u00e1nyos\u00edtott elj\u00e1r\u00e1sok<\/h4>\n\n\n\n<p>Ez a megk\u00f6zel\u00edt\u00e9s a tanulm\u00e1ny tervez\u00e9se sor\u00e1n felmer\u00fcl\u0151 szitu\u00e1ci\u00f3s, id\u0151beli, feladat- \u00e9s ig\u00e9nyjellemz\u0151 v\u00e1ltoz\u00f3kra vonatkozik. Hozzon l\u00e9tre szabv\u00e1nyos int\u00e9zked\u00e9seket az \u00f6sszes r\u00e9sztvev\u0151 sz\u00e1m\u00e1ra konzisztens be\u00e1ll\u00edt\u00e1shoz.<\/p>\n\n\n\n<h4 id=\"h-counterbalancing\">Ellens\u00falyoz\u00e1s<\/h4>\n\n\n\n<p>Ez a megk\u00f6zel\u00edt\u00e9s a r\u00e9sztvev\u0151 v\u00e1ltoz\u00f3khoz kapcsol\u00f3dik, mint p\u00e9ld\u00e1ul a vizsg\u00e1lat konkr\u00e9t sorrendje. Ennek figyelembev\u00e9tele \u00e9rdek\u00e9ben utas\u00edthatja a r\u00e9sztvev\u0151k egyik csoportj\u00e1t, hogy fejezzen be egy szakaszt, m\u00edg egy m\u00e1sik csoport egy m\u00e1sik szakaszt fejez be.<\/p>\n\n\n\n<h4 id=\"h-random-sampling\">V\u00e9letlenszer\u0171 mintav\u00e9tel<\/h4>\n\n\n\n<p>Ez a megk\u00f6zel\u00edt\u00e9s a r\u00e9sztvev\u0151k v\u00e1ltoz\u00f3ihoz kapcsol\u00f3dik, \u00e9s biztos\u00edtja, hogy minden r\u00e9sztvev\u0151 egyenl\u0151 es\u00e9llyel ker\u00fclj\u00f6n kiv\u00e1laszt\u00e1sra. Amikor p\u00e9ld\u00e1ul az embereket egy kontrollcsoportra \u00e9s egy k\u00eds\u00e9rleti csoportra osztja, v\u00e9letlenszer\u0171en h\u00fazhat neveket, hogy biztos\u00edtsa, hogy minden egyes szem\u00e9lynek azonos es\u00e9lye van arra, hogy b\u00e1rmelyik csoportba beker\u00fclj\u00f6n.<\/p>\n\n\n\n<h4 id=\"h-masking\">Maszkol\u00e1s<\/h4>\n\n\n\n<p>Ez a megk\u00f6zel\u00edt\u00e9s a k\u00eds\u00e9rletez\u0151 v\u00e1ltoz\u00f3kkal foglalkozik. A maszkol\u00e1s azt jelenti, hogy valaki \u00fagy v\u00e9gzi el a k\u00eds\u00e9rletet, hogy nem ismeri a vizsg\u00e1lat c\u00e9lj\u00e1t.<\/p>\n\n\n\n<h2 id=\"h-the-world-s-largest-scientifically-accurate-illustrations-gallery\">A vil\u00e1g legnagyobb tudom\u00e1nyos pontoss\u00e1g\u00fa illusztr\u00e1ci\u00f3s gal\u00e9ri\u00e1ja<\/h2>\n\n\n\n<p><a href=\"https:\/\/mindthegraph.com\" target=\"_blank\" rel=\"noreferrer noopener\">Mind the Graph<\/a> a vil\u00e1g legnagyobb tudom\u00e1nyos pontoss\u00e1g\u00fa illusztr\u00e1ci\u00f3s gal\u00e9ri\u00e1ja, amely tele van illusztr\u00e1ci\u00f3kkal \u00e9s grafikonokkal a tudom\u00e1ny sz\u00e1mos \u00e1g\u00e1b\u00f3l, p\u00e9ld\u00e1ul a biol\u00f3gi\u00e1b\u00f3l, k\u00e9mi\u00e1b\u00f3l, fizik\u00e1b\u00f3l \u00e9s m\u00e9g sok m\u00e1s tudom\u00e1ny\u00e1gb\u00f3l. Egyszer\u0171en haszn\u00e1lhat\u00f3 \u00e9s fantasztikusan jav\u00edtja munk\u00e1ja min\u0151s\u00e9g\u00e9t!<\/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\">Kezdjen alkotni az Mind the Graph-vel<\/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>Ismerje meg a kutat\u00e1sban el\u0151fordul\u00f3 idegen v\u00e1ltoz\u00f3kat \u00e9s azok ellen\u0151rz\u00e9s\u00e9nek m\u00f3djait a kutat\u00e1s bels\u0151 \u00e9rv\u00e9nyess\u00e9g\u00e9nek n\u00f6vel\u00e9se \u00e9rdek\u00e9ben.<\/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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