LIS 504 - Bias

Some types of bias in data gathering

Nonresponse bias Some parts of the population studied may be less inclined to provided data than others.
Selective observation The researcher may be more inclined to examine some parts of the population (or some variables, causal explanations, etc.) than others.
Courtesy bias Cultural norms may make respondents present more pleasant information or say what they think the researcher wants to hear.

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