NSEhk212hkPracticehkQs
Whathkishkthehkpurposehkofhkrandomlyhkassigninghkpeoplehktohkcontrolhkorhkexp
erimentalhkgroups?hk-hkcorrecthkanswer✔ ✔
Everyhksubjecthkhashkanhkequalhkchancehkofhkbeinghkincludedhkinhkanyhkgroup
.hkNohksystematichkbiashkthathkmayhkaffecthkdependenthkvariable
Whathkishkthehkpurposehkofhkgivinghkthehkexperimentalhkgrouphkahktreatment?hk-
hkcorrecthkanswer✔ ✔
Experimenterhkcontrolshk&hkconsciouslyhkvarieshkthehkIV,hkthenhkobserveshk
itshkeffecthkonhkDV.hkThishkoffershkahkcomparison
Whyhkdoeshkthehkresearcherhktryhktohkcontrolhkextraneoushkvariables?hk-
hkcorrecthkanswer✔ ✔
Grouphkdifferenceshkthathkemergehktrulyhkrelatedhktohktreatmenthkarehkobserv
ed.hkEx.hkagehkishkcontrolledhkthroughhkinclusionhkcriteria
Whathkarehkthehklimitationshkofhkexperimentalhkresearch?hk-hkcorrecthkanswer
✔ ✔
Somehkvariableshkarehknothkamenablehktohkmanipulationhkorhkethicalhktohkdohk
so,hkmakinghkithkimpractical
Thehkresearcherhkrandomlyhkassignedhkposthksurgicalhkpatientshktohkaromather
apyhkorhkusualhkcare,hktohkassesshkeffectshkonhknausea.hkThishkishkanhkexamplehko
f:hk-hkcorrecthkanswer✔ ✔ Experimentalhkdesign
, Intervention,hkpeoplehkwerehkassignedhkrandomly
Thehkresearcherhkcomparedhklevelshkofhkagitationhkinhktwohkgroupshkofhknursin
ghkhomehkresidents,hkonehkgrouphklivinghkinhkahkhomehkwherehktheyhkreceivedhk
ahkdailyhkfoothkmassagehkforhk2hkweeks,hkthehkotherhkinhkahkhomehkwithouthkthehk
massages.hkThishkishkanhkexamplehkof:hk-hkcorrecthkanswer✔ ✔
Quasiexperimentalhkdesign
Intervention,hkbuthksubjectshkwerehknothkassignedhkrandomly;hknonequivalent
hkcontrolhkgroup
Thehkresearcherhkstudiedhkdailyhkpainhkratingshkoverhkahk10-
weekhkperiodhkforhkahkgrouphkofhkpatientshkwithhkrheumatoidhkarthritishkwhohkb
eganhkahkTaihkChihkprogramhkinhkweekhk5.hkThishkishkanhkexamplehkof:hk-
hkcorrecthkanswer✔ ✔ Quasiexperimentalhkdesign
Intervention,hkbuthkonlyhkonehkgrouphkwashkwithouthkanyhkrandomization;hkti
mehkseries
Thehkresearcherhkcomparedhkpregnanthkwomenhkwhohkdidhkorhkdidhknothkhavehk
ahkmiscarriagehkinhktermshkofhksubsequenthkmaritalhksatisfaction.hkThishkishkanhk
examplehkof:hk-hkcorrecthkanswer✔ ✔ Nonexperimentalhkdesign
Whathkishkthehkpurposehkofhkrandomlyhkassigninghkpeoplehktohkcontrolhkorhkexp
erimentalhkgroups?hk-hkcorrecthkanswer✔ ✔
Everyhksubjecthkhashkanhkequalhkchancehkofhkbeinghkincludedhkinhkanyhkgroup
.hkNohksystematichkbiashkthathkmayhkaffecthkdependenthkvariable
Whathkishkthehkpurposehkofhkgivinghkthehkexperimentalhkgrouphkahktreatment?hk-
hkcorrecthkanswer✔ ✔
Experimenterhkcontrolshk&hkconsciouslyhkvarieshkthehkIV,hkthenhkobserveshk
itshkeffecthkonhkDV.hkThishkoffershkahkcomparison
Whyhkdoeshkthehkresearcherhktryhktohkcontrolhkextraneoushkvariables?hk-
hkcorrecthkanswer✔ ✔
Grouphkdifferenceshkthathkemergehktrulyhkrelatedhktohktreatmenthkarehkobserv
ed.hkEx.hkagehkishkcontrolledhkthroughhkinclusionhkcriteria
Whathkarehkthehklimitationshkofhkexperimentalhkresearch?hk-hkcorrecthkanswer
✔ ✔
Somehkvariableshkarehknothkamenablehktohkmanipulationhkorhkethicalhktohkdohk
so,hkmakinghkithkimpractical
Thehkresearcherhkrandomlyhkassignedhkposthksurgicalhkpatientshktohkaromather
apyhkorhkusualhkcare,hktohkassesshkeffectshkonhknausea.hkThishkishkanhkexamplehko
f:hk-hkcorrecthkanswer✔ ✔ Experimentalhkdesign
, Intervention,hkpeoplehkwerehkassignedhkrandomly
Thehkresearcherhkcomparedhklevelshkofhkagitationhkinhktwohkgroupshkofhknursin
ghkhomehkresidents,hkonehkgrouphklivinghkinhkahkhomehkwherehktheyhkreceivedhk
ahkdailyhkfoothkmassagehkforhk2hkweeks,hkthehkotherhkinhkahkhomehkwithouthkthehk
massages.hkThishkishkanhkexamplehkof:hk-hkcorrecthkanswer✔ ✔
Quasiexperimentalhkdesign
Intervention,hkbuthksubjectshkwerehknothkassignedhkrandomly;hknonequivalent
hkcontrolhkgroup
Thehkresearcherhkstudiedhkdailyhkpainhkratingshkoverhkahk10-
weekhkperiodhkforhkahkgrouphkofhkpatientshkwithhkrheumatoidhkarthritishkwhohkb
eganhkahkTaihkChihkprogramhkinhkweekhk5.hkThishkishkanhkexamplehkof:hk-
hkcorrecthkanswer✔ ✔ Quasiexperimentalhkdesign
Intervention,hkbuthkonlyhkonehkgrouphkwashkwithouthkanyhkrandomization;hkti
mehkseries
Thehkresearcherhkcomparedhkpregnanthkwomenhkwhohkdidhkorhkdidhknothkhavehk
ahkmiscarriagehkinhktermshkofhksubsequenthkmaritalhksatisfaction.hkThishkishkanhk
examplehkof:hk-hkcorrecthkanswer✔ ✔ Nonexperimentalhkdesign
