Isivivinyo somtholampilo ngukuthi kubandakanya abahlanganyeli bomuntu futhi ufuna ukuphendula imibuzo ethize mayelana nohlobo lokungenelela kwezokwelapha. Lokhu kungaba umuthi noma uhlobo oluthile lwezokwelapha, njengokushintsha kokudla okunomsoco noma ukusikhipha.
Blind Double
Emlandweni wokuhlolwa kweklinikhi, kusho ukuthi iziguli ezimbili noma abacwaningi abazi ukuthi ngubani othola indawo yokuhlala futhi othola ukwelashwa.
Ngenxa yokuthi iziguli azi ukuthi zithola ukuthini, inkolelo yabo mayelana nokuthi kuzokwenzekani ayigcini imiphumela. Ngenxa yokuthi abacwaningi abazi, ngeke bakwazi ukubonisa iziguli ngalokho abakuthola khona, futhi ngeke bahlaziye imiphumela ngokulindela kwabo ukuthi bazoba yini imiphumela.
Uma abacwaningi bazi ukuthi ubani othola ukwelashwa kodwa abahlanganyeli abangekho, kubizwa ngokuthi ukuhlolwa okukodwa okuyimpumputhe.
I-Placebo ne-Control Groups
I- placebo yinto engasebenzi (kaningi iphilisi leshukela) elinikezwe isiguli esikhundleni semithi.
Ekuvivinyweni kwezidakamizwa, iqembu elilawulayo linikezwa i-placebo ngenkathi elinye iqembu linikezwa umuthi (noma olunye ukwelashwa) okucwaningwa. Ngaleyo ndlela, abacwaningi bangaqhathanisa ukusebenza komuthi ngokusebenza komsebenzi we-placebo.
Ukulawulwa kwe-Placebo kubhekisela eqenjini lokulawula elithola i-placebo. Lokhu kuyisihlukanisa nezifundo ezivele zinike abahlanganyeli ukwelashwa futhi babhale imiphumela.
Isivivinyo seMitholampilo esilawuliwe-Double-Blind-Controled Trial
Ngakho-ke, isilingo somtholampilo esilawulwa kabili-blindbo-blindbo is a ucwaningo lwezokwelapha olubandakanya abahlanganyeli bomuntu lapho ohlangothini olungalutho lwazi ukuthi ngubani othola ukuthi imaphi ukwelashwa kanye ne-placebo enikezwa eqenjini lokulawula.
Ngaphambi kokufika kulesi sigaba, abacwaningi bavame ukuqhuba izifundo zesilwane, ukuvivinywa kokwelashwa okungabandakanyi iqembu lokulawula, nezifundo ezingaboni izimpumputhe.
Ucwaningo oluphakeme kakhulu lubuye luhlelwe ngokungahleliwe, okusho ukuthi lezi zihloko zihanjiswe ngezikhathi ezithile kuma-placebo namaqembu okungenelela. I-acronym DBRCT isetshenziswa kakhulu kulezi zinhlobo zezifundo.