SOAN 2120 Lecture : SOAN 2120 Feb.29.docx
Document Summary
2 forms: (1) issue a call for volunteers [i. e. medical research-advertise for potential subjects i. e. Niu and contact them to take part in a study of attitudes toward technology in higher education] Draw groups [or clusters] of participants instead of individuals [i. e. survey a sample of members of. Draw a simple or stratified random sample of individuals and mail questionnaires to them [subject to low response rate] [running] whereas in a colder climate, ppl do that indoors] Purposively select those whom we believe will give us the nest information as participants [i. e. might observe over a long period that several members of congress consistently vote on the winning side on environmental legislation] Useful when attempting to locate participants who are hard to find [i. e. suppose you want to study heroin addicts that have never had institutional contacts (never sought treatment nor had been arrested)]