Seam Effect
The seam effect, also called the seam bias, a phenomenon specific to longitudinal panel surveys, refers to the tendency for estimates of change, as measured across the "seam" between two successive survey administrations (or "waves"), to far exceed change estimates that are measured within a single survey wave—often by a factor of 10 or more. Seam effects have been found in virtually every panel survey examined, regardless of the characteristics under study, the data collection methods, or the length of the recall period. Seam bias almost always signals the presence of serious measurement error, which can severely compromise the statistical utility of estimates of change. A considerable amount of research over the past two decades has documented the existence of seam effects in longitudinal surveys ...
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Reader's Guide
Ethical Issues In Survey Research
Measurement - Interviewer
Measurement - Mode
Measurement - Questionnaire
Measurement - Respondent
Measurement - Miscellaneous
Nonresponse - Item-Level
Nonresponse - Outcome Codes And Rates
Nonresponse - Unit-Level
Operations - General
Operations - In-Person Surveys
Operations - Interviewer-Administered Surveys
Operations - Mall Surveys
Operations - Telephone Surveys
Political And Election Polling
Public Opinion
Sampling, Coverage, And Weighting
Survey Industry
Survey Statistics
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