{"id":37515,"date":"2026-02-10T08:39:13","date_gmt":"2026-02-09T23:39:13","guid":{"rendered":"https:\/\/uxdaystokyo.com\/articles\/?post_type=glossary&#038;p=37515"},"modified":"2026-03-09T21:58:26","modified_gmt":"2026-03-09T12:58:26","slug":"self-serving-bias","status":"publish","type":"glossary","link":"https:\/\/uxdaystokyo.com\/articles\/glossary\/self-serving-bias\/","title":{"rendered":"\u81ea\u5df1\u5949\u4ed5\u30d0\u30a4\u30a2\u30b9"},"content":{"rendered":"<p>\u81ea\u5df1\u5949\u4ed5\u30d0\u30a4\u30a2\u30b9\u3068\u306f\u3001\u6210\u529f\u3057\u305f\u969b\u306f\u81ea\u8eab\u306e\u80fd\u529b\u3084\u52aa\u529b\u306e\u304a\u304b\u3052\u3060\u3068\u8003\u3048\u3001\u5931\u6557\u3057\u305f\u969b\u306f\u904b\u3084\u74b0\u5883\u306e\u305b\u3044\u306b\u3059\u308b\u3001\u4eba\u9593\u304c\u666e\u904d\u7684\u306b\u6301\u3064\u8a8d\u77e5\u306e\u504f\u308a\u306e\u3053\u3068\u3067\u3042\u308b\u3002\u3053\u306e\u7121\u610f\u8b58\u306e\u5fc3\u7406\u4f5c\u7528\u306f\u3001\u81ea\u5c0a\u5fc3\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306e\u9632\u885b\u6a5f\u5236\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002\u30d7\u30ed\u30c0\u30af\u30c8\u958b\u767a\u306b\u304a\u3044\u3066\u3053\u306e\u30d0\u30a4\u30a2\u30b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u89e3\u91c8\u304c\u88fd\u54c1\u306e\u8a55\u4fa1\u3084\u7d99\u7d9a\u5229\u7528\u306b\u76f4\u63a5\u5f71\u97ff\u3059\u308b\u305f\u3081\u3001\u6975\u3081\u3066\u91cd\u8981\u3068\u306a\u308b\u3002<\/p>\n<p><em><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/gemini-generated-image-dq9284dq9284dq92-1024x559.png\" alt=\"\" width=\"742\" height=\"405\" class=\"wp-image-37525 aligncenter\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/gemini-generated-image-dq9284dq9284dq92-1024x559.png 1024w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/gemini-generated-image-dq9284dq9284dq92-300x164.png 300w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/gemini-generated-image-dq9284dq9284dq92-768x419.png 768w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/gemini-generated-image-dq9284dq9284dq92-1536x838.png 1536w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/gemini-generated-image-dq9284dq9284dq92-2048x1117.png 2048w\" sizes=\"auto, (max-width: 742px) 100vw, 742px\" \/><\/em><\/p>\n<h2>\u90fd\u5408\u306e\u826f\u3044\u89e3\u91c8\u3067\u81ea\u5c0a\u5fc3\u3092\u5b88\u308b\u5fc3\u306e\u50cd\u304d<\/h2>\n<p>\u81ea\u5df1\u5949\u4ed5\u30d0\u30a4\u30a2\u30b9\u306f\u3001\u81ea\u5206\u306b\u3068\u3063\u3066\u90fd\u5408\u306e\u826f\u3044\u539f\u56e0\u306e\u89e3\u91c8\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u81ea\u5df1\u80af\u5b9a\u611f\u3092\u7dad\u6301\u3057\u3088\u3046\u3068\u3059\u308b\u5fc3\u7406\u7684\u306a\u30e1\u30ab\u30cb\u30ba\u30e0\u3067\u3042\u308b\u3002\u3053\u306e\u50cd\u304d\u306f\u3001\u4e3b\u306b\u4e8c\u3064\u306e\u5074\u9762\u304b\u3089\u69cb\u6210\u3055\u308c\u308b\u3002\u4e00\u3064\u306f\u3001\u6210\u529f\u3092\u81ea\u8eab\u306e\u624d\u80fd\u3084\u52aa\u529b\u3068\u3044\u3063\u305f\u5185\u7684\u306a\u8981\u56e0\u306b\u7d50\u3073\u3064\u3051\u308b\u300c\u81ea\u5df1\u9ad8\u63da\u7684\u5e30\u5c5e\u300d\u3067\u3042\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4eba\u306f\u81ea\u4fe1\u3092\u6df1\u3081\u3001\u30dd\u30b8\u30c6\u30a3\u30d6\u306a\u81ea\u5df1\u50cf\u3092\u5f37\u5316\u3059\u308b\u3002\u3082\u3046\u4e00\u3064\u306f\u3001\u5931\u6557\u3092\u30bf\u30b9\u30af\u306e\u96e3\u6613\u5ea6\u3084\u4e0d\u904b\u3068\u3044\u3063\u305f\u5916\u7684\u306a\u8981\u56e0\u306e\u305b\u3044\u306b\u3059\u308b\u300c\u81ea\u5df1\u9632\u885b\u7684\u5e30\u5c5e\u300d\u3067\u3042\u308a\u3001\u81ea\u5c0a\u5fc3\u304c\u50b7\u3064\u304f\u306e\u3092\u9632\u304e\u3001\u7cbe\u795e\u7684\u306a\u30c0\u30e1\u30fc\u30b8\u3092\u548c\u3089\u3052\u308b\u5f79\u5272\u3092\u6301\u3064\u3002\u3053\u306e\u4e8c\u3064\u306e\u50cd\u304d\u306b\u3088\u3063\u3066\u3001\u4eba\u306f\u5fc3\u7406\u7684\u306a\u5b89\u5b9a\u3092\u4fdd\u3063\u3066\u3044\u308b\u306e\u3067\u3042\u308b\u3002<\/p>\n<h2>\u8a9e\u6e90\u30fb\u63d0\u5531\u8005<\/h2>\n<p>\u3053\u306e\u6982\u5ff5\u306f\u3001\u4eba\u3005\u304c\u7269\u4e8b\u306e\u539f\u56e0\u3092\u3069\u306e\u3088\u3046\u306b\u89e3\u91c8\u3059\u308b\u304b\u3092\u63a2\u308b\u793e\u4f1a\u5fc3\u7406\u5b66\u306e\u300c\u5e30\u5c5e\u7406\u8ad6\u300d\u306e\u7814\u7a76\u304b\u3089\u751f\u307e\u308c\u305f\u3002\u305d\u306e\u4e2d\u3067\u3001\u30ab\u30ca\u30c0\u306e\u5fc3\u7406\u5b66\u8005\u3067\u3042\u308b<ruby>Dale<rt>\u30c7\u30fc\u30eb<\/rt><\/ruby> <ruby>T<rt>\u30c6\u30a3\u30fc<\/rt><\/ruby>. <ruby>Miller<rt>\u30df\u30e9\u30fc<\/rt><\/ruby>\u3068<ruby><rt>\u30ed\u30b9<\/rt><\/ruby>\u304c1975\u5e74\u306b\u767a\u8868\u3057\u305f\u8ad6\u6587\u304c\u3001\u3053\u306e\u30d0\u30a4\u30a2\u30b9\u3092\u4f53\u7cfb\u7684\u306b\u8ad6\u3058\u305f\u753b\u671f\u7684\u306a\u7814\u7a76\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u5f7c\u3089\u306f\u3001\u4eba\u3005\u304c\u81ea\u5c0a\u5fc3\u3092\u5b88\u308b\u305f\u3081\u306b\u3001\u6210\u529f\u3068\u5931\u6557\u306e\u539f\u56e0\u5e30\u5c5e\u3092\u975e\u5bfe\u79f0\u306b\u884c\u3046\u3001\u3064\u307e\u308a\u300c\u81ea\u5df1\u306b\u5949\u4ed5\u3059\u308b\u300d\u65b9\u5411\u3078\u89e3\u91c8\u3092\u504f\u3089\u305b\u308b\u50be\u5411\u304c\u3042\u308b\u3053\u3068\u3092\u5b9f\u8a3c\u7684\u306b\u793a\u3057\u305f\u3002<\/p>\n\n\t\t<style>\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 50%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-37515 gallery-columns-2 gallery-size-medium'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/uxdaystokyo.com\/articles\/glossary\/self-serving-bias\/miller-dale\/'><img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"220\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/miller-dale.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-37523\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/miller-dale.jpg 220w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/miller-dale-150x150.jpg 150w\" sizes=\"auto, (max-width: 220px) 100vw, 220px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-37523'>\n\t\t\t\tDale T. Miller\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/uxdaystokyo.com\/articles\/glossary\/self-serving-bias\/michael-ross\/'><img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"300\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/michael-ross-250x300.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-37537\" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/michael-ross-250x300.jpg 250w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/michael-ross-768x922.jpg 768w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/michael-ross.jpg 800w\" sizes=\"auto, (max-width: 250px) 100vw, 250px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-37537'>\n\t\t\t\tMichael Ross\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<h2>\u6210\u529f\u4f53\u9a13\u3092\u30e6\u30fc\u30b6\u30fc\u81ea\u8eab\u306e\u624b\u67c4\u306b\u3059\u308b\u8a2d\u8a08<\/h2>\n<p>\u30d7\u30ed\u30c0\u30af\u30c8\u3084\u30b5\u30fc\u30d3\u30b9\u306e\u4f53\u9a13\u8a2d\u8a08\u306b\u304a\u3044\u3066\u3001\u81ea\u5df1\u5949\u4ed5\u30d0\u30a4\u30a2\u30b9\u306e\u7406\u89e3\u306f\u6b20\u304b\u305b\u306a\u3044\u3002\u306a\u305c\u306a\u3089\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u81ea\u5df1\u52b9\u529b\u611f\u3001\u3059\u306a\u308f\u3061\u300c\u81ea\u5206\u306f\u3046\u307e\u304f\u3067\u304d\u308b\u300d\u3068\u3044\u3046\u611f\u899a\u3092\u80b2\u3080\u4e0a\u3067\u76f4\u63a5\u7684\u306b\u95a2\u308f\u308b\u304b\u3089\u3067\u3042\u308b\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u30bf\u30b9\u30af\u3092\u9054\u6210\u3057\u305f\u969b\u306b\u3001\u305d\u306e\u6210\u529f\u304c\u300c\u81ea\u5206\u81ea\u8eab\u306e\u529b\u306b\u3088\u308b\u3082\u306e\u3060\u300d\u3068\u611f\u3058\u3089\u308c\u308b\u3088\u3046\u306a\u8a2d\u8a08\u306f\u3001\u30d7\u30ed\u30c0\u30af\u30c8\u3078\u306e\u6e80\u8db3\u5ea6\u3068\u611b\u7740\u3092\u6df1\u3081\u308b\u3002\u9006\u306b\u3001\u64cd\u4f5c\u306b\u3064\u307e\u305a\u3044\u305f\u969b\u306b\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u81ea\u5206\u306e\u305b\u3044\u3060\u300d\u3068\u611f\u3058\u3066\u3057\u307e\u3046\u3068\u3001\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u306e\u4f4e\u4e0b\u3084\u96e2\u8131\u306b\u3064\u306a\u304c\u308a\u304b\u306d\u306a\u3044\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u6210\u529f\u306f\u30e6\u30fc\u30b6\u30fc\u306e\u624b\u67c4\u306b\u3001\u5931\u6557\u306f\u30b7\u30b9\u30c6\u30e0\u306e\u4e0d\u89aa\u5207\u3055\u306e\u305b\u3044\u3060\u3068\u81ea\u7136\u306b\u611f\u3058\u3055\u305b\u308b\u3088\u3046\u306a\u3001\u5de7\u307f\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u8a2d\u8a08\u304c\u6c42\u3081\u3089\u308c\u308b\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/4272.png\" alt=\"\" width=\"822\" height=\"448\" class=\"aligncenter wp-image-37526 \" srcset=\"https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/4272.png 640w, https:\/\/uxdaystokyo.com\/articles\/wp-content\/uploads\/2026\/02\/4272-300x164.png 300w\" sizes=\"auto, (max-width: 822px) 100vw, 822px\" \/><\/p>\n<h2>\u5c0f\u3055\u306a\u6210\u529f\u3067\u5b66\u7fd2\u610f\u6b32\u3092\u5f15\u304d\u51fa\u3059\u4ed5\u639b\u3051<\/h2>\n<p>\u3053\u306e\u30d0\u30a4\u30a2\u30b9\u3092\u5efa\u8a2d\u7684\u306b\u6d3b\u7528\u3059\u308b\u4ee3\u8868\u7684\u306a\u65b9\u6cd5\u304c\u3001\u30e6\u30fc\u30b6\u30fc\u30aa\u30f3\u30dc\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u8a2d\u8a08\u3067\u3042\u308b\u3002\u7279\u306b\u8907\u96d1\u306a\u6a5f\u80fd\u3092\u6301\u3064\u30d7\u30ed\u30c0\u30af\u30c8\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u5fc3\u7406\u7684\u306a\u969c\u58c1\u3092\u611f\u3058\u3084\u3059\u3044\u304c\u3001\u4ee5\u4e0b\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u305d\u306e\u969c\u58c1\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<p>1. <strong>\u7c21\u5358\u306a\u30bf\u30b9\u30af\u306e\u63d0\u4f9b<\/strong>: \u30e6\u30fc\u30b6\u30fc\u304c\u6700\u521d\u306b\u89e6\u308c\u308b\u30bf\u30b9\u30af\u3092\u3001\u8ab0\u3082\u304c\u9054\u6210\u3067\u304d\u308b\u30ec\u30d9\u30eb\u306b\u610f\u56f3\u7684\u306b\u8a2d\u5b9a\u3059\u308b\u3002<br \/>\n2. <strong>\u5373\u6642\u304b\u3064\u80af\u5b9a\u7684\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af<\/strong>: \u30bf\u30b9\u30af\u3092\u5b8c\u4e86\u3059\u308b\u305f\u3073\u306b\u3001\u660e\u78ba\u3067\u30dd\u30b8\u30c6\u30a3\u30d6\u306a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\uff08\u52b9\u679c\u97f3\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3001\u8cde\u8cdb\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306a\u3069\uff09\u3092\u5373\u5ea7\u306b\u4e0e\u3048\u308b\u3002<br \/>\n3. <strong>\u6210\u529f\u4f53\u9a13\u306e\u9023\u7d9a<\/strong>: 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