truncate ascertainment

a type of incomplete ascertainment in which any sibship in which there is no affected member is not ascertained.

Medical dictionary. 2011.

Look at other dictionaries:

  • truncate selection — in medical genetics, the selection of families for a genetic study in such a way that one or more kinds of sibships are not ascertained, usually those sibships in which no member is affected with the trait under study. See also ascertainment and… …   Medical dictionary

  • Ascertainment bias — In scientific research, ascertainment bias occurs when false results are produced by non random sampling and conclusions made about an entire group are based on a distorted or nontypical sample. If this is not accounted for, results can be… …   Wikipedia

  • ascertainment — In epidemiological and genetic research, the method by which a person, pedigree, or cluster is brought to the attention of an investigator; has a bearing on the interpretation of segregation ratios, concordance rates, linkage analysis, and other… …   Medical dictionary

  • Sampling bias — In statistics, sampling bias is when a sample is collected in such a way that some members of the intended population are less likely to be included than others. It results in a biased sample, a non random sample[1] of a population (or non human… …   Wikipedia

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