ABSTRACT
W EHAVEatmanypointsinthepreviousfourchaptersreferredtoerrorsthatmayoccurinthecollectionofsurveydata. Thischapterdiscussesresponseerrorssystematicallyand
withparticularreferencetointerviewing,thoughmanyofthepoints applyequallytomailquestionnaires.Theratherd ifferenttypesof errortowhichobservationaltechniquesaresubjectwerediscussedin Chapter10.
