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Making online samples more representative

What does it mean for a sample to be representative? How can you tell if your sample is biased and if so, what is there to do about it?In this webinar, Andrew Mercer of the Pew Research Center will present the results of the Center's research into...

Catalogue: Webinars 2021
Authors: Andrew Mercer, Jeffrey Henning
March 17, 2021

Research papers

Bias: Three fingers pointing back!

This paper is a call to action to think about bias in a different way - by going back to basics. It is an outline about how to develop greater empathy from the beginning of a project to the end. Far from a touchy-feely or soft” ...

Catalogue: Global Qualitative 2017: Back to the future
Author: Katja E. Cahoon
November 10, 2017

Research papers

The problem of bias

This paper looks at the various sources of bias, discusses how to reduce them or, at least, how to measure them.

Catalogue: ESOMAR Teach-In Seminar 1995: All You Ever Wanted To Know About Sampling, Statistics And Questionnaires
Author: Neil Higgs
February 14, 1995

Research papers


A special study consisting of a survey among 326 housewives, has shown that the friendliness effect in product tests is minimised if the method below is used: The interviewer shows three packs with the same contents, but with different code...

Catalogue: ESOMAR/WAPOR Congress 1969
Author: Johan J. M. van Tulder
June 15, 1969

Research papers

Sources of bias in sensory evaluations as applied to food and beverages

The paper deals with two broad areas of bias in the preconceptions of the respondent and the preconceptions of the researcher. In relation to the former the specific areas of bias dealt with are: A. the motivation of the respondent; B. the...

Catalogue: ESOMAR Congress 1966
Authors: A. Kondos, Charles W. Clunies-Ross
September 1, 1966

Research papers

Comparability in multi-country surveys

This paper discusses the following main points: 1. Either for combining findings from different countries, or for comparing them it is essential to have truly comparable data. 2. The use of the same methods in different countries does not by itself...

Catalogue: ESOMAR/WAPOR Conference 1965
Author: Lucy Webster
June 15, 1965