unit-waited regression

ganankalalo, unit-waited regression anedi bahula regression vislaeshanha yokka saralikruta mariyu balamaina version (winer & dissen, 1976), ikkada antaraayam padam matrame anchanaa veyabadindi. antey, idhi oka namuunaaku saripotundi
ikkada suutram _ _ prati okkati binary chararaasulu, bahusha ekapaksha baruvutho guninchabadutundi.
prati predictor daani swantha anchanaa gunakam kaligi unna marinta saadhaarana bahula regression namuunaatoe dheeniki viruddhamgaah
saamaajika saastraalalo, unit-waited regression konnisaarlu binary vargeekarana kosam upayoginchabadutundi, antey.ii. avunu-kaadu anae samadhaanaanni anchanaa vaeyadaaniki suutram _ 4 "ledhu", suutram _ 5 "avunu" anie suuchistumdi. bahula sarala tirogamanam (vargeekarana sandarbhamlo sarala vivakshata vislaeshanha anie pilustaaru) kante dheenini ardham chesukovadam sulabham.
unit baruvulu.
unit-waited regression anedi moodu dasallo konasage balamaina regression paddhati. modata, vaddii phalitaaniki predictors empika cheyabadataayi; aadarsavantamgaa, empikaku manchi anubhavika ledhaa saiddhaantika kaaranaalu undaali. rendavadi, predictorlu praamaanika roopamgaa maarchabadataayi. chivaraku, predictorlu kalisi jodinchabadataayi, mariyu eee mottaanni variate anie pilustaaru, idhi phalitaanni anchanaa vesedigaa upayoginchabadutundi.
burgess paddhati.
burgess paddhatini modata saamaajika shaastravetta ernest doubleu samarpinchaaru. perolpai unchabadina khaideela vijayam ledhaa vaiphalyaanni nirnayinchadaaniki 1928 adhyayanamlo burgess. modata, athanu perol vijayamtho mudipadi undani nammutunna 21 chararaasulanu enchukunnadu. taruvaata, athanu prati predictornu sunna ledhaa okati (burgess, 1928) yokka praamaanika roopamgaa marchadu. predictorlaku rendu viluvalu unnappudu, lakshya phalitaaniki sambandhinchina viluva okatigaa code cheyabadindi. burgess perolpai vijayanni lakshya phalitamgaa enchukunnadu, kabatti "dongatanam charitra" vanti predictor "avunu" = 0 mariyu "ledhu" = 1 gaa code cheyabadindi. eee coded viluvalu predictor skornu srushtinchadaaniki jodinchabaddaayi, tadwara adhika skorlu vijayaniki manchi avakaasaanni anchanaa vestaayi. skorlu sunna (vijayaniki anchanaa vesevaaru laeru) nundi 21 (mottam 21 anchanaa vesevaaru vijayanni anchanaa vesevaaru) varaku undavacchu.
rendu kante ekkuva viluvalu unna predictorla kosam, burgess paddhati aatmaasraya teerpu aadhaaramgaa cutoff skornu enchukuntundi. udaaharanaku, burgess paddhatini (gatfredson & snider, 2005) upayoginchi chesina oka adhyayanam naera pravartanaku sambandhinchina firyadula sankhyanu oka predictorga enchukundi. perol paie vaiphalyam lakshya phalitamgaa, firyadula sankhya eee krindi vidhamgaa code cheyabadindihi "sunna nundi rendu firyadulu" = 0, mariyu "moodu ledhaa anthakante ekkuva firyadulu" = 1 (gatfredson & snider, 2005. p. 18).
kerby paddhati.
kerby paddhati burgess paddhatini pooli untundi, conny rendu vidhaluga bhinnamgaa untundi. modata, burgess paddhati binary phalitamtho bahula-viluva kaligina predictor kosam cutoff skornu enchukoovadaaniki aatmaasraya teerpunu upayogistundagaa, kerby paddhati vargeekarana mariyu regression tree (cart) vislaeshanhanu upayogistundi. eee vidhamgaa, cutoff score empika anedi aatmaasraya teerpupai aadharapadi undadu, conny chii-chadarapu viluva garishtamgaa unde point vanti ganaanka pramaanampai aadharapadi untundi.
rendava vyatyaasam emitante, burgess paddhati binary phalitaaniki vartimpajeyabadinappatiki, kerby paddhati bahula-viluva phalitaaniki vartimpajeyavachu, endukante cart vislaeshanha atuvanti sandarbhaallo cutoff skorlanu gurtinchagaladu, t-viluva garishtamgaa unna point vanti pramaanaanni upayogistundi. cart vislaeshanha binary matrame kaadu, punaraavrutamavutundi kabatti, phalitam emitante predictor variable mallee vibhajinchabadutundi, idhi rendu cutoff skorlanu istundi. prati predictorku praamaanika roopam emitante, cart vislaeshanha vibajananu srushtinchinappudu oka skoru jodinchabadutundi.
oka adhyayanam (kerby, 2003) pedda aidu vyaktitva lakshanaala yokka aidu lakshanaalanu anchanaa vesevigaa empika cheyabaddaayi, idhi aatmahatya aalochana yokka bahula-viluva kolatanu anchanaa vestundi. taruvaata, vyaktitva skorlu cart vislaeshanhatoe praamaanika roopamloki marchabaddayi. cart vislaeshanha oka vibajananu andinchinappudu, phalitam burgess paddhati laaga untundi, dheenilo predictor sunna ledhaa okatigaa code cheyabadindi. conny neurotisism kolata kosam, phalitam rendu cutoff skorlu. adhika neurotisism skorlu marinta aatmahatya aalochanatho sahasambandham kaligi unnanduna, rendu cutoff skorlu eee krindi kodingku daariteesaaih "takkuva neurotisism" = 0, "mitamaina neurotisism" = 1, "adhika neurotisism" = 2 (kerby, 2003).
"z"-score paddhati.
predictorlanu nirantara sthaayilo kolichinappudu maroka paddhatini vartimpajeyavachu. atuvanti sandarbhamlo, prati predictornu praamaanika skoru ledhaa "z"-scorega maarchavacchu, tadwara anni predictorlu sunna sagatu mariyu oka praamaanika vichalanam kaligi untaayi. eee unit-waited regression paddhatitoe, vaividhyam anedi "z"-skorla (e.zii., daves, 1979; bobco, roth, & buster, 2007).
saahitya sameeksha.
unit-waited regressionu upayoginchi chesina modati anubhavika adhyayanam saamaajika shaastravetta ernest doubleu 1928 adhyayanam anie vistrutamgaa pariganinchabadutundi. burgess. perol vijayam ledhaa vaiphalyaanni anchanaa vaeyadaaniki athanu 21 chararaasulanu upayoginchaadu, mariyu yea khaideelu perol ivvaalane daani gurinchi nirnayaalu teesukovadamlo unit baruvulu upayogakaramaina saadhanamani phalitaalu suuchistunnaayi. uttama skorlu kaligina khaideelalo, 98 saatam mandhi perolpai vijayam saadhinchaaru; mariyu chettha skorlu unnavaarilo, 24 saatam mandhi matrame vaastavaaniki vijayam saadhinchaaru (burgess, 1928).
yeka-baruvutho kuudina tirogamanamlo palgonna ganita samasyalanu mottamodata mottamodata bahula-vaividhya vislaeshanhaloo pratyeka aasakti unna pramukha ganankavetta shamyul stanley wilks charchinchaaru. beata baruvulanu anchanaa vaeyadaaniki dayta andubaatulo lenappudu, aacharanaatmaka amarikalalo unit baruvulanu elaa upayoginchavachho wilks vivarinchaadu. udaaharanaku, oka chinna kalaasaala pravaesaaniki manchi vidyaarthulanu enchukoovaalanukoevachchu. conny paatasaala vadda daetaanu sekarinchadaaniki mariyu praamaanika bahula tirogamana vislaeshanhanu nirvahinchadaaniki dabbu undakapovachhu. eee sandarbhamlo, paatasaala aneka predictorlanu upayoginchavacchu-haiskool gradelu, saat skorlu, upadhyaya ratinglu. wilks (1938) ganitasaastraparamgaa unit baruvulu aacharanalo enduku baga panicheyaali anie chuupimchaaru.
fraank schmid (1971) unit baruvula anukarana adhyayananni nirvahinchaaru. athani phalitaalu wilks nijamgaa sarainadani mariyu aaa unit baruvulu aacharanaatmaka adhyayanala anukaranalalo baga panicheestaayani choopinchaayi.
robon daves (1979) anuvartita adhyayanaalalo unit baruvula vadakanni charchinchaaru, idhi unit baruvula namuunaala balamaina andaanni suuchistumdi. jacob kohen unit baruvula viluvanu kooda charchinchi vaati aacharanaatmaka prayojanaanni gurtinchaaru. nijaaniki, ayana ilaa vraasaaru, "aacharanaatmaka vishayamgaa, chaalaa saarlu, manam unit baruvulanu upayoginchadam manchidi" (kohen, 1990, p. 1306).
dave kerby (2003) unit baruvulu praamaanika regressiontho baga polchinatlu choopinchaadu, cross dhruveekarana adhyayanamtho alaa chesaadu-antey, athanu oka namoonaalo beata baruvulanu pondhi vaatini rendava namuunaaku vartimpajesaadu. aasakti yokka phalitam aatmahatya aalochana, mariyu predictor variables vistruta vyaktitva lakshanaalu. cross dhruveekarana namoonaalo, vyaktitvam mariyu aatmahatya aalochanala madhya sahasambandham praamaanika bahula thirogamanamtho ("r" =. 47) kante unit-waited regression ("r" =. 48) thoo konchem balamgaa undhi.
gatfredson mariyu snider (2005), unit-waited regression yokka burgess paddhatini itara paddhathulatho poolchaaru, n = 1,924 nirmaana namuunaa mariyu n = 7,552 cross-volidation namuunaatoe. piers point-byzyrialnu upayoginchi, unit-weits modal kosam cross volidation namoonaalo prabhavam parimaanam "r" =. 392, idhi logistic regression ("r" =. 368) mariyu predictive autribute analysis ("r" =. 387) kante kontha peddadi, mariyu moodava dasaamsa sthaanamlo ("r" =. 397) matrame bahula regression kante takkuva.
unit baruvulu, bobco, roth mariyu buster (2007) saahityam yokka sameekshalo "unit baruvulu mariyu regression baruvulu cross-validated bahula sahasambandham yokka parimaanam paramgaa adhe vidhamgaa panicheestaayi, mariyu anubhavika adhyayanalu eee phalitaanni aneka dasabdaluga dhruvikarinchayi" (p. 693).
andreas graphe yuu anchanaa vaeyadaaniki tommidi sthaapinchabadina bahula regression namuunaalaku samaana baruvunu andinche vidhananni vartimpajesaaru.ess. adhyaksha ennikalu. 1976 nundi 2012 varaku jarigina padhi ennikalaloo, samanamga baruvunna predictorlu asalu regression namuunaala anchanaa lopaanni sagatuna naalugu saatam tagginchaaru. anni chararaasulanu kaligi unna samaana-baruvula namuunaa, atyanta khachitamaina regression namuunaa yokka lopaanni 29 saatam tagginche kramaankanam chesina anchanaalanu andinchindi.
udaaharana.
oka udaaharana saadhanalo ekakam baruvulu elaa upayogapadatayo spashtam cheyavachu.
brenna bry mariyu sahacharulu (1982) koumaaradasalo maadakadravyaala vaadakaaniki kaaranamemito adigina prasnanu parishkarinchaaru. munupati parisoedhana bahula tirogamanaanni upayoginchindi; eee paddhatitoe, atyadhika beata baruvu unna uttama predictor kosam vetakadam sahajam. madyaanni mundugaane upayoginchadam uttama predictor anie munupati oka adhyayanam kanugonnatlu bry mariyu sahacharulu gurtinchaaru. tallidandrula nundi dhooram kavadam uttama predictor anie maroka adhyayanam kanugondi. paatasaalalo takkuva taragatulu uttama predictor anie maroka adhyayanam kanugondi. pratiroopam cheyadamlo vaiphalyam spashtamgaa oka samasya, beetaalu bownes cheyadam valla sambhavinche samasya.
bry mariyu sahacharulu vaerae vidhananni suuchimchaaru uttama predictor kosam vetakadaaniki badulugaa, vaaru predictorla sankhyanu chuusaaru. maroe maatalo cheppalante, vaaru prati predictorku oka unit baruvunu icchaaru. vaari adhyayanamlo aaru anchanaalu unnaih 1) paatasaalalo takkuva taragatulu, 2) mathamtho anubandham lekapovadam, 3) madyapaanam chese chinna vayassu, 4) manasika baadha, 5) takkuva aatmagouravam mariyu 6) tallidandrula nundi dhooram kavadam. predictorlanu praamaanika roopamloki maarchadaaniki, prati risk factornu gairhajaruga (sunnaga score cheyabadindi) ledhaa prastutamgaa (okatigaa score cheyabadindi) score cheyabadindi. udaaharanaku, paatasaalalo takkuva taragatulaku coding eee krindi vidhamgaa undih "sii ledhaa anthakante ekkuva" = 0, dii ledhaa eff = 1. pramaada kaarakaala sankhya maadakadravyaala vaadakaaniki manchi predictor anie phalitaalu chupinchayi ekkuva pramaada karakalu unna koumaaradasalo unnavaaru mandulanu upayoginche avakaasam ekkuvagaa undhi.
bry mariyu sahacharulu upayoginchina namuunaa emitante, maadakadravyaala viniyogadaarulu maadakadravyaalu vaadevaaru kaani vaari nundi yea pratyeka maargamlo bhinnamgaa undaru. badulugaa, vaaru edurkovalsina samasyala sankhyalo vaaru bhinnamgaa untaaru. "oka vyakti edurkovalsina kaarakaala sankhya aaa karakalu emito khachitamgaa kante chaalaa mukhyam" (p. 277). eee namuunaanu batti, unit-waited regression anedi vislaeshanhaku tagina paddhati.
beata baruvulu.
praamaanika bahula regressionlo, prati predictornu "beata baruvu", "regression baruvu" ledhaa "waited regression coefficients" (βw ledhaa bw anie suuchistaaru) anie piluvabade sankhyatho gunistaaru. sthiraamkamtho paatu eee utpattulanu jodinchadam dwara anchanaa pondabadutundi. konni pramaanaala dwara uttama anchanaanu ivvadaaniki baruvulanu enchukunnappudu, modalnu saraina leanier modalga suuchistaaru. anduvalla, bahula regression anedi saraina sarala namuunaa. dheeniki viruddhamgaa, unit-waited regressionu anuchitamaina leanier modal antaaru.
namuunaa vivarana.
praamaanika bahula regression anedi regression namoonaalo phalitaaniki sambandhinchina anni sambandhita predictorlu cherchabaddayane oohapai aadharapadi untundi. eee oohanu modal specification antaaru. anni sambandhita predictorlanu namoonaalo cherchinappudu mariyu anni asambaddha predictorlanu modal nundi minahayinchinappudu oka modal perkonabadutundani chebutaaru. aacharanaatmaka paristhitulalo, oka adhyayanam anni sambandhita predictorlanu praadhaanyatatoo nirnayinchagalagadam chaalaa arudu. eee sandarbhamlo, namuunaalu perkonabadavu mariyu beata baruvula anchanaalu tolaginchabadina chararashi pakshapaatamto baadhapadataayi. antey, beata baruvulu oka namuunaa nundi marokadaaniki maaravacchu, eee paristhitini konnisaarlu bouncing beatas samasya anie pilustaaru. bouncing beatas thoo unna eee samasya unit-waited regressionu upayogakaramaina paddhatigaa chestundi.

