Longitudinal controller stanley. A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e. e. of or extending along the long axis of the body, or the direction from front to back, or head to tail. A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e. , people) over long periods of time (i. longitudinal, adj. LONGITUDINAL definition: of or relating to longitude or length. Collins COBUILD Advanced Learner’s Dictionary. of or pertaining to longitude or length: longitudinal measurement. How to use longitudinal in a sentence.
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