Lead Time

Lead Time – Period that elapse between two specific moments in time. For example: the time that elapses between a prototype’s being developed and its manufacture and distribution to the retail trade. Letter of Intent – It is usually a time-consuming operation for a marketing research agency to draw up a research proposal for a … Read more Lead Time

Error of Measurement

Error of Measurement – Error(s) made in a study because the measuring instrument is no entirely accurate. See also: Measuring Instrument/Standard error of measurements Experimental Error – The variation that is probable and that may be anticipated in every instance in which an experiment is duplicated. An adequate experimental design must include adequate safeguards against … Read more Error of Measurement

Internal Consistency

Internal Consistency – The degree to which different questions (for example, in a questionnaire) measure the same problem or subject. The mutual coherence of the questions. Interrater Reliabilty – Syn: Interjudge reliability/Intersubjectivity See: Interjudge Reliability Intersubjectivity – Syn: Interjudge Reliability/Interrater reliability See: Interjudge Reliability Method of Item Analysis – A method of measuring the reliability … Read more Internal Consistency

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