Glossary L

Deutsch: Langlebigkeit / Español: Longevidad / Português: Longevidade / Français: Longévité / Italiano: Longevità /

Longevity is defined as the length or duration of life; number of years a person can expect to live.

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Longitudinal axis also known as vertical axis refers to the axis that runs straight down through the top of the head and spinal column and is at a right angle to the transverse plane of motion. Longitudinal axis or Vertical axis is also known as the Long axis.

longitudinal design refers to systematic study of changes in the same individual or group examined over time that is in contrast with Crosssectional design.

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Longitudinal developmental research design is defined as a developmental research design that examines development by making a series of observations or measurements over time. Typically, a group of individuals who are all the same age is measured at different points in time.

Longitudinal fissure is defined as the space between the two (2) hemispheres.

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Longitudinal investigations refers to a method of studying child development in which a small number of children are studied over a period of years.

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Longitudinal Research refers to a method of Research whereby the same person are studied at different ages and stages of development.

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Longitudinal studies are studies in which a group of individuals is investigated over a relatively long period of time; analysis that focuses on studies of a particular group conducted repeatedly over a period of time. Longitudinal study involves the collection of data at different points in time, as contrasted with a cross-sectional study. Please see Cohort study, Panel study, and Trend study.