{"id":16120,"date":"2022-07-28T06:59:20","date_gmt":"2022-07-28T09:59:20","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/?p=16120"},"modified":"2024-12-05T16:09:24","modified_gmt":"2024-12-05T19:09:24","slug":"post-hoc-analysis","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/lv\/pec-hoc-analize\/","title":{"rendered":"Post Hoc anal\u012bze: Process un testu veidi"},"content":{"rendered":"

Jebkur\u0101 p\u0113tniec\u012bbas projekt\u0101 tiek ieg\u016bti daudzi dati, no kuriem da\u017ei ir v\u0113rt\u012bgi, bet da\u017ei nav. Ja p\u0113t\u012bjum\u0101 atrodat kaut ko jaunu, negaid\u012btu vai mulsino\u0161u, tas var \u0101tri vien k\u013c\u016bt p\u0101r\u0146emo\u0161s. <\/p>\n\n\n\n

Da\u017ereiz, kad esat spiests iev\u0113rot termi\u0146u, varat novirz\u012bties no pareiz\u0101 ce\u013ca. Izvairieties uztraukties par \u0161iem neparedz\u0113tajiem rezult\u0101tiem, kad j\u016bsu pa\u0161reiz\u0113jais p\u0113t\u012bjums ir pabeigts, izsl\u0113dzot tos no izskat\u012b\u0161anas.<\/p>\n\n\n\n

Veicot post-hoc anal\u012bzi, j\u016bs neanaliz\u0113jat katru nejau\u0161u eksperimenta rezult\u0101tu. Ir svar\u012bgi mekl\u0113t likumsakar\u012bbas, ja nov\u0113rojat kaut ko t\u0101du, kas prasa r\u016bp\u012bg\u0101ku izp\u0113ti un turpm\u0101ku izp\u0113ti, lai pal\u012bdz\u0113tu lab\u0101k izprast koncepciju. <\/p>\n\n\n\n

P\u0113c post-hoc anal\u012bzes var ieg\u016bt papildu inform\u0101ciju un padzi\u013cin\u0101ti iedzi\u013cin\u0101ties sav\u0101 priek\u0161metu b\u0101z\u0113. Apl\u016bkosim post hoc anal\u012bzi s\u012bk\u0101k.<\/p>\n\n\n\n

Post-hoc anal\u012bze: kas t\u0101 ir?<\/strong><\/h2>\n\n\n\n

Lat\u012b\u0146u valod\u0101 post hoc noz\u012bm\u0113 \"p\u0113c tam\", t. i., analiz\u0113t eksperiment\u0101los datus p\u0113c tam. <\/p>\n\n\n\n

Post-hoc anal\u012bzes m\u0113r\u0137is ir atrast likumsakar\u012bbas p\u0113c tam, kad p\u0113t\u012bjums ir pabeigts, un atkl\u0101t rezult\u0101tus, kas nebija prim\u0101rais m\u0113r\u0137is. T\u0101d\u0113j\u0101di visas anal\u012bzes, kas veiktas p\u0113c eksperimenta pabeig\u0161anas un nav iepriek\u0161 pl\u0101notas, tiek uzskat\u012btas par post-hoc anal\u012bz\u0113m. <\/p>\n\n\n\n

Jau sav\u0101ktie dati tiek izmantoti post-hoc p\u0113t\u012bjum\u0101. P\u0113tnieki analiz\u0113 \u0161os datus, lai izstr\u0101d\u0101tu jaunus m\u0113r\u0137us, kas nebija paredz\u0113ti eksperimenta pl\u0101n\u0101. T\u0101p\u0113c post hoc p\u0113t\u012bjumus var veikt ar apkopotiem datiem no iepriek\u0161\u0113jiem izm\u0113\u0123in\u0101jumiem. <\/p>\n\n\n\n

Post-hoc anal\u012b\u017eu veik\u0161anas process bie\u017ei vien ir laikietilp\u012bgs, ta\u010du tam ir vair\u0101kas priek\u0161roc\u012bbas. Lai atkl\u0101tu v\u0113rt\u012bgu inform\u0101ciju, iev\u0113rojiet sapr\u0101t\u012bgu piesardz\u012bbu un nep\u0101rv\u0113rt\u0113jiet negaid\u012btos rezult\u0101tus. Tas var liecin\u0101t par kaut ko noz\u012bm\u012bgu, pat ja tas ir nejau\u0161s gad\u012bjums.<\/p>\n\n\n\n

Post hoc anal\u012bze ir noder\u012bga, p\u0113tot k\u013c\u016bdu \u012bpatsvaru, nov\u0113rt\u0113jot hipot\u0113\u017eu noz\u012bm\u012bgumu vai nosakot, vai t\u0101s ir statistiski noz\u012bm\u012bgas. <\/p>\n\n\n\n

Vair\u0101ku izm\u0113\u0123in\u0101jumu veik\u0161ana vai novirz\u012b\u0161an\u0101s no galven\u0101s izp\u0113tes l\u012bnijas palielina k\u013c\u016bdu un viltus pozit\u012bvu rezult\u0101tu risku. \u0160aj\u0101 gad\u012bjum\u0101 b\u016btiska noz\u012bme ir post hoc p\u0113t\u012bjumiem. K\u0101 tie\u0161i tas darbojas? <\/p>\n\n\n\n

Post-hoc anal\u012bze: k\u0101 t\u0101 darbojas?<\/strong><\/h2>\n\n\n\n

No datiem joproj\u0101m ir iesp\u0113jams ieg\u016bt v\u0113rt\u012bgas atzi\u0146as, pat ja galvenais m\u0113r\u0137is nav sasniegts. Iesp\u0113jams, z\u0101\u013cu blakusefektus un datus par tiem. Vai ar\u012b jebkuras citas l\u012bdz\u012bgas z\u0101les ar\u012b var\u0113tu b\u016bt v\u0113rts p\u0101rbaud\u012bt. <\/p>\n\n\n\n

Post-hoc anal\u012bzes m\u0113r\u0137is ir atbild\u0113t uz jaut\u0101jumiem p\u0113c tam, kad p\u0113t\u012bjums ir pabeigts, un \u0161is m\u0113r\u0137is p\u0113t\u012bjum\u0101 nav nor\u0101d\u012bts.<\/p>\n\n\n\n

Lai noteiktu, no k\u0101 rad\u0101s at\u0161\u0137ir\u012bbas, p\u0113c statistiski noz\u012bm\u012bga rezult\u0101ta konstat\u0113\u0161anas tiek izmantots post hoc tests. Post-hoc testus var izmantot, lai nov\u0113rt\u0113tu at\u0161\u0137ir\u012bbas starp vair\u0101k\u0101m grup\u0101m, vienlaikus izvairoties no eksperimenta k\u013c\u016bd\u0101m. Ir formul\u0113ti vair\u0101ki post hoc testi, un liel\u0101k\u0101 da\u013ca no tiem dod l\u012bdz\u012bgus rezult\u0101tus. <\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Past\u0101v da\u017e\u0101di post hoc testu veidi<\/strong><\/h2>\n\n\n\n

Jebkur\u0101 p\u0113t\u012bjum\u0101 vai kl\u012bnisk\u0101 izm\u0113\u0123in\u0101jum\u0101 sav\u0101ktos datus var analiz\u0113t, lai atkl\u0101tu likumsakar\u012bbas un da\u017e\u0101dus faktorus. Visbie\u017e\u0101k izmantotie post hoc testi ir \u0161\u0101di:<\/p>\n\n\n\n