{"id":112300,"date":"2018-01-31T17:36:04","date_gmt":"2018-01-31T17:36:04","guid":{"rendered":"https:\/\/staging.wingify.com\/blog\/aa-testing-interet-conversion\/"},"modified":"2026-09-10T20:20:48","modified_gmt":"2026-09-10T14:50:48","slug":"aa-testing-interet-conversion","status":"publish","type":"post","link":"https:\/\/wingify.com\/blog\/fr\/aa-testing-interet-conversion\/","title":{"rendered":"A\/A Testing : perte de temps ou r\u00e9el int\u00e9r\u00eat ?"},"content":{"rendered":"<p style=\"text-align: justify\">M\u00e9connu et sujet \u00e0 de vives discussions sur son utilit\u00e9, l\u2019A\/A Testing apporte pourtant une vraie valeur ajout\u00e9e pour ceux qui cherchent \u00e0 int\u00e9grer <a href=\"https:\/\/wingify.com\/fr\/experimentation-web\/\" target=\"_blank\" rel=\"noopener noreferrer\">une solution d\u2019A\/B Testing<\/a> avec rigueur et pr\u00e9cision.<\/p>\n<p>Mais avant toute chose \u2026<\/p>\n<h2>Qu\u2019est-ce que l\u2019A\/A Testing\u00a0?<\/h2>\n<p>L\u2019A\/A Testing est un d\u00e9riv\u00e9 de l\u2019A\/B Testing. Cependant, au lieu de comparer deux versions diff\u00e9rentes (de votre page d\u2019accueil, par exemple), on compare ici <strong>deux versions identiques<\/strong>.<\/p>\n<p>Deux versions identiques\u00a0? Oui\u00a0!<\/p>\n<p>L\u2019objectif principal d\u2019un A\/A Testing est simple\u00a0: v\u00e9rifier que la solution d\u2019<strong>A\/B Testing a \u00e9t\u00e9 correctement configur\u00e9e et est efficace<\/strong>.<\/p>\n<p>On utilise l\u2019A\/A Testing dans 3 cas\u00a0:<\/p>\n<ul>\n<li>Pour v\u00e9rifier l\u2019exactitude de l\u2019outil d\u2019A\/B Testing<\/li>\n<li>Pour d\u00e9finir un taux de conversion de r\u00e9f\u00e9rence pour de futurs tests<\/li>\n<li>Pour statuer sur une taille optimale d\u2019\u00e9chantillon pour les tests A\/B<\/li>\n<\/ul>\n<h2>1. V\u00e9rifier l\u2019exactitude de l\u2019outil d\u2019A\/B Testing<\/h2>\n<p>Lorsqu\u2019on effectue un test A\/A, on compare donc 2 versions strictement identiques d\u2019une m\u00eame page.<\/p>\n<p>Logiquement, le but d\u2019un test A\/A est d\u2019afficher des valeurs similaires en termes de conversion. L\u2019id\u00e9e \u00e9tant ici de prouver que la solution de <a href=\"https:\/\/wingify.com\/fr\/experimentation-web\/\" target=\"_blank\" rel=\"noopener noreferrer\">test est efficace<\/a>.<\/p>\n<p>En toute logique, on organisera donc un A\/A Test lorsque on met en place une nouvelle solution d\u2019A\/B Test ou que l\u2019on passe d\u2019une solution \u00e0 une autre.<\/p>\n<p>Cependant, il arrive qu\u2019un &#8220;gagnant&#8221; soit d\u00e9clar\u00e9 sur deux versions pourtant identiques. Il faut donc <a href=\"https:\/\/wingify.com\/fr\/blog\/reussite-programme-ab-testing\/\" target=\"_blank\" rel=\"noopener noreferrer\">chercher \u00e0 comprendre &#8220;pourquoi&#8221;<\/a> et c\u2019est l\u00e0 tout l\u2019int\u00e9r\u00eat de l\u2019A\/A Testing.<\/p>\n<ul>\n<li>Le test peut ne pas avoir \u00e9t\u00e9 conduit correctement<\/li>\n<li>L\u2019outil peut ne pas avoir \u00e9t\u00e9 bien param\u00e9tr\u00e9<\/li>\n<li>La solution d\u2019A\/B Testing peut \u00eatre inefficace.<\/li>\n<\/ul>\n<h2>2. D\u00e9finir un taux de conversion de r\u00e9f\u00e9rence<\/h2>\n<p>Imaginons que vous souhaitiez mettre en place une s\u00e9rie d\u2019A\/B Tests sur votre page d\u2019accueil. Vous param\u00e9trez la solution mais un probl\u00e8me surgit\u00a0: vous ne savez pas sur quel taux de conversion comparer les diff\u00e9rentes versions.<\/p>\n<p>Dans ce cas pr\u00e9cis, un A\/A Test vous aidera \u00e0 trouver le taux de conversion &#8220;r\u00e9f\u00e9rence&#8221; pour vos futurs A\/B Tests.<\/p>\n<p>Exemple\u00a0: <em>Vous lancez un A\/A Test sur votre page d\u2019accueil pour laquelle votre objectif est le remplissage d\u2019un formulaire de contact. En comparant les r\u00e9sultats, vous obtenez des r\u00e9sultats quasi-identiques (et c\u2019est normal)\u00a0: 5,01% et 5,05% de conversion. Vous pouvez d\u00e9sormais utiliser cette donn\u00e9e avec la certitude qu\u2019elle repr\u00e9sente bien la r\u00e9alit\u00e9 de votre taux de conversion et activer vos A\/B Tests pour essayer de d\u00e9passer ce taux. Si vos A\/B Tests vous indiquent qu\u2019une &#8220;meilleure&#8221; variation r\u00e9alise 5,05% de conversion, c\u2019est qu\u2019en r\u00e9alit\u00e9 il n\u2019y a pas de progr\u00e8s. <\/em><\/p>\n<h2>3. Trouver une taille d\u2019\u00e9chantillon pour de futurs tests<\/h2>\n<p>Le probl\u00e8me lorsqu\u2019on compare deux versions similaires, c\u2019est le param\u00e8tre &#8220;chance&#8221;.<\/p>\n<p>En effet, les tests \u00e9tant formul\u00e9s sur des <a href=\"https:\/\/wingify.com\/fr\/resource-categories\/ebooks\/\" target=\"_blank\" rel=\"noopener noreferrer\">bases statistiques<\/a>, il existe bien une marge d\u2019erreur qui peut influencer les r\u00e9sultats de vos campagnes d\u2019A\/B Testing.<\/p>\n<p>Pour diminuer cette marge d\u2019erreur, pas de secret\u00a0: il faut souvent augmenter la taille de l\u2019\u00e9chantillon de trafic pour diminuer le risque que des facteurs al\u00e9atoires (dits &#8220;de chance&#8221;) viennent biaiser les r\u00e9sultats.<\/p>\n<p>En effectuant un test A\/A, vous pourrez donc &#8220;voir&#8221; \u00e0 quelle taille d\u2019\u00e9chantillon la solution de test se rapproche le plus de &#8220;l\u2019\u00e9galit\u00e9 parfaite&#8221; entre vos versions identiques.<\/p>\n<p>En somme, un A\/A test vous permet de trouver la taille d\u2019\u00e9chantillon pour laquelle le facteur &#8220;chance&#8221; est minimis\u00e9\u00a0: vous pourrez donc vous servir de cette taille d\u2019\u00e9chantillon pour vos futurs tests en A\/B. Cela dit, les tests A\/B requi\u00e8rent de fa\u00e7on g\u00e9n\u00e9rale une taille d\u2019\u00e9chantillon inf\u00e9rieure.<\/p>\n<div class=\"insert-quote-blue\">\n<h3>L\u2019 A\/A Testing\u00a0: une perte de temps ?<\/h3>\n<\/div>\n<p>La question fait d\u00e9bat dans le milieu de l\u2019A\/B Testing\u00a0: faut-il oui ou non prendre le temps de faire de l\u2019A\/A Test avant de faire de l\u2019A\/B Test.<\/p>\n<p>Et c\u2019est l\u00e0 toute la question\u00a0: <strong>le temps<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-14617 aligncenter\" src=\"https:\/\/static.wingify.com\/gcp\/uploads\/abtasty\/temps-gestion.png\" alt=\"\" width=\"300\" height=\"202\" \/><\/p>\n<h5 style=\"text-align: center\"><em><span style=\"font-weight: 400\">Faire des A\/A Tests prend un temps et un trafic consid\u00e9rable<\/span><\/em><\/h5>\n<p>En r\u00e9alit\u00e9, faire des A\/A Tests prend du temps, consid\u00e9rablement plus de temps que des A\/B Tests car le volume de trafic n\u00e9cessaire pour prouver que les deux &#8220;variations identiques&#8221; am\u00e8nent au m\u00eame taux de conversion est cons\u00e9quent.<\/p>\n<p>Le probl\u00e8me, selon <a href=\"https:\/\/conversionxl.com\/blog\/aa-testing-waste-time\/\">ConversionXL<\/a>, est que l\u2019A\/A Testing est chronophage et empi\u00e8te sur du trafic qui pourrait \u00eatre utiliser \u00e0 conduire de &#8220;vrais tests&#8221;, c\u2019est \u00e0 dire destin\u00e9s \u00e0 comparer deux variations.<\/p>\n<p>Enfin, l\u2019A\/A Testing est beaucoup plus facile \u00e0 mettre en place sur des sites \u00e0 fort trafic.<\/p>\n<p>L\u2019id\u00e9e \u00e9tant que si vous dirigez un site qui se lance, ou un site \u00e0 faible trafic, il est inutile de perdre votre temps \u00e0 faire de l\u2019A\/A Test\u00a0: concentrez-vous plut\u00f4t sur l\u2019optimisation de votre tunnel d\u2019achat ou sur <a href=\"https:\/\/wingify.com\/fr\/blog\/customer-lifetime-value-calculer-ameliorer\/\" target=\"_blank\" rel=\"noopener noreferrer\">votre Customer Lifetime Value\u00a0<\/a>: vous arriverez \u00e0 des r\u00e9sultats beaucoup plus probants et surtout beaucoup plus int\u00e9ressants.<\/p>\n<div class=\"insert-quote-blue\">\n<h3>Une alternative int\u00e9ressante\u00a0: la comparaison de donn\u00e9es<\/h3>\n<\/div>\n<p>Pour v\u00e9rifier l\u2019exactitude de votre solution d\u2019A\/B Testing, il existe un autre moyen simple \u00e0 mettre en place. Pour cela, il faut que votre solution d\u2019A\/B Testing puisse int\u00e9grer <a href=\"https:\/\/wingify.com\/fr\/blog\/comprendre-le-comportement-des-utilisateurs-grace-aux-donnees\/\" target=\"_blank\" rel=\"noopener noreferrer\">une autre source de donn\u00e9es analytiques<\/a>.<\/p>\n<p>En faisant cela, vous pourrez comparer les donn\u00e9es et voir si elles pointent au m\u00eame r\u00e9sultat\u00a0: c\u2019est une autre fa\u00e7on de v\u00e9rifier l\u2019efficacit\u00e9 de votre solution de test.<\/p>\n<p>Si vous constatez des diff\u00e9rences significatives de donn\u00e9es entre les deux sources, vous savez que l\u2019une des deux est\u00a0:<\/p>\n<ul>\n<li>Soit mal param\u00e9tr\u00e9e<\/li>\n<li>Soit inefficace et doit donc \u00eatre chang\u00e9e<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/wingify.com\/fr\/contact\/\" target=\"_blank\" rel=\"noopener noreferrer\">Vous avez aim\u00e9 cet article\u00a0? Nous serions ravis d\u2019\u00e9changer davantage avec vous.<\/a><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13136\" src=\"https:\/\/static.wingify.com\/gcp\/uploads\/abtasty\/campaign-trigger.png\" alt=\"Campaign Trigger\" width=\"250\" height=\"223\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u00e9connu et sujet \u00e0 de vives discussions sur son utilit\u00e9, l\u2019A\/A Testing apporte pourtant une vraie valeur ajout\u00e9e pour ceux qui cherchent \u00e0 int\u00e9grer une solution d\u2019A\/B Testing avec rigueur et pr\u00e9cision. Mais avant toute chose \u2026 Qu\u2019est-ce que l\u2019A\/A Testing\u00a0? L\u2019A\/A Testing est un d\u00e9riv\u00e9 de l\u2019A\/B Testing. Cependant, au lieu de comparer deux&#8230;<\/p>\n","protected":false},"author":1432,"featured_media":115643,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"post_read_time":0,"footnotes":""},"categories":[1],"tags":[10786],"feature":[],"industry-type":[],"product":[],"role":[],"region":[],"class_list":["post-112300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unlisted","tag-experimentation-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A\/A Testing : perte de temps ou r\u00e9el int\u00e9r\u00eat ? - Wingify<\/title>\n<meta name=\"description\" content=\"M\u00e9connu et sujet \u00e0 de vives discussions sur son utilit\u00e9, l\u2019A\/A Testing apporte pourtant une vraie valeur ajout\u00e9e pour ceux qui cherchent \u00e0 int\u00e9grer une solution d\u2019A\/B Testing avec rigueur et pr\u00e9cision. 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Mais avant toute chose\u2026 Qu\u2019est-ce que l\u2019A\/A Testing\u00a0?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/wingify.com\/blog\/fr\/aa-testing-interet-conversion\/\" \/>\n<meta property=\"og:site_name\" content=\"Wingify Blog\" \/>\n<meta property=\"article:published_time\" content=\"2018-01-31T17:36:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-10T14:50:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.wingify.com\/gcp\/uploads\/sites\/3\/2026\/09\/Release-Management-3.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2400\" \/>\n\t<meta property=\"og:image:height\" content=\"2332\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Hubert Wassner\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Wingify\" \/>\n<meta name=\"twitter:site\" content=\"@Wingify\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Hubert Wassner\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/\"},\"author\":{\"name\":\"Hubert Wassner\",\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/#\\\/schema\\\/person\\\/4d8faacc4773e4e1e2d5d1aafe2685d2\"},\"headline\":\"A\\\/A Testing : perte de temps ou r\u00e9el int\u00e9r\u00eat ?\",\"datePublished\":\"2018-01-31T17:36:04+00:00\",\"dateModified\":\"2026-09-10T14:50:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/\"},\"wordCount\":1055,\"image\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/static.wingify.com\\\/gcp\\\/uploads\\\/sites\\\/3\\\/2026\\\/09\\\/Release-Management-3.png\",\"keywords\":[\"Exp\u00e9rimentation\"],\"articleSection\":[\"Unlisted\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/\",\"url\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/\",\"name\":\"A\\\/A Testing : perte de temps ou r\u00e9el int\u00e9r\u00eat ? - Wingify\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/aa-testing-interet-conversion\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/static.wingify.com\\\/gcp\\\/uploads\\\/sites\\\/3\\\/2026\\\/09\\\/Release-Management-3.png\",\"datePublished\":\"2018-01-31T17:36:04+00:00\",\"dateModified\":\"2026-09-10T14:50:48+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/wingify.com\\\/blog\\\/fr\\\/#\\\/schema\\\/person\\\/4d8faacc4773e4e1e2d5d1aafe2685d2\"},\"description\":\"M\u00e9connu et sujet \u00e0 de vives discussions sur son utilit\u00e9, l\u2019A\\\/A Testing apporte pourtant une vraie valeur ajout\u00e9e pour ceux qui cherchent \u00e0 int\u00e9grer une solution d\u2019A\\\/B Testing avec rigueur et pr\u00e9cision. 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