Home > Publications . Search All . Browse All . Country . Browse PSC Pubs . PSC Report Series

PSC In The News

RSS Feed icon

U-M is the only public and non-coastal university on Forbes' top-10 list for billionaire production

Shaefer says the details matter in child tax reform

Prescott says Michigan's restrictive sex offender law hurts social reentry

More News

Highlights

ASA President Bonilla-Silva takes exception with Chief Justice Roberts' 'gobbledygook' jab

Nobel laureate Angus Deaton, David Lam, and colleagues discuss global poverty, 10/5, 4pm

James Jackson named inaugural recipient of U-M Diversity Scholar Career Award

HomeLab grand opening

More Highlights

Next Brown Bag

Mon, Oct 23, 2017, noon: Carol Shiue, "Social Mobility in China, 1300-1800"

Sample size for cognitive interview pretesting

Archived Abstract of Former PSC Researcher

Blair, J., and Frederick G. Conrad. 2011. "Sample size for cognitive interview pretesting." Public Opinion Quarterly, 75(4): 636-658.

Every cognitive interview pretest designer must decide how many interviews need to be conducted. With little theory or empirical research to guide the choice of sample size, practitioners generally rely on the examples of other studies and their own experience or preferences. We investigated pretest sample size both theoretically and empirically. Using a model of the relationship of sample size to question problem prevalence, detection power of the cognitive interview technique, and probability of observing a problem, we computed the sample size necessary, under varying conditions, to detect problems. Under a range of plausible values for the model parameters, we found that additional problems continued to be detected as sample size increased. We also report on an empirical study that simulated the number of problems detected at different sample sizes. Multiple outcome measures showed a strong positive relationship between sample size and problem detection; serious problems that were not detected in small samples were consistently observed in larger samples. We discuss the implications of these findings for practice and for additional research.

DOI:10.1093/poq/nfr035 (Full Text)

Country of focus: United States of America.

Browse | Search : All Pubs | Next