A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over long periods of time (i.e., uses longitudinal data).

LONGITUDINAL definition: of or relating to longitude or length. See examples of longitudinal used in a sentence.

The meaning of LONGITUDINAL is placed or running lengthwise. How to use longitudinal in a sentence.

medical, social sciences Longitudinal research is done on people or groups over a long period of time: longitudinal analysis / studies (Definition of longitudinal from the Cambridge Advanced Learner's …

1. of or pertaining to longitude or length: longitudinal measurement. 2. extending in the direction of the length of a thing; lengthwise. 3. of or extending along the long axis of the body, or the direction from …

longitudinal, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Jan 20, 2026 · Adjective longitudinal (not comparable) Running across a set direction of an object.

Dec 13, 2023 · In longitudinal studies, researchers do not manipulate any variables or interfere with the environment. Instead, they simply conduct observations on the same group of subjects over a period …

May 8, 2020 · In a longitudinal study, researchers repeatedly examine the same individuals to detect any changes that might occur over a period of time.

of or pertaining to longitude or length: longitudinal measurement. extending in the direction of the length of a thing; running lengthwise: a thin, longitudinal stripe. Zoology pertaining to or extending along the …