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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). It is often a type of observational study, although it can also be structured as longitudinal randomized experiment. [1]
The Genetic Studies of Genius, later known as the Terman Study of the Gifted, [1] is currently the oldest and longest-running longitudinal study in the field of psychology. . It was begun by Lewis Terman at Stanford University in 1921 to examine the development and characteristics of gifted children into adultho
Anthropological survey paper from 1961 by Juhan Aul from University of Tartu who measured about 50 000 people. In fields such as epidemiology, social sciences, psychology and statistics, an observational study draws inferences from a sample to a population where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints.
Quantitative psychological research findings result from mathematical modeling and statistical estimation or statistical inference. The two types of research differ in the methods employed, rather than the topics they focus on. There are three main types of psychological research: Correlational research; Descriptive research; Experimental research
The study started with over 18,000 nationally representative individuals. [11] It involved more than 9,000 individuals as of 2009. Socio-Economic Panel, a longitudinal panel dataset of the population in Germany. It is a household-based study that started in 1984 and which reinterviews adult household members annually.
This test is not recommended given more than 2 levels of the within-subjects factor because the assumption of sphericity is commonly violated in such cases. Alternative Univariate test [6] —These tests account for violations to the assumption of sphericity, and can be used when the within-subjects factor exceeds 2 levels. The F statistic is ...
Cross-sectional research is a research method often used in developmental psychology, but also utilized in many other areas including social science and education. This type of study utilizes different groups of people who differ in the variable of interest, but share other characteristics such as socioeconomic status, educational background ...
Klaus Warner Schaie (February 1, 1928 - February 7, 2023) was an American social gerontologist and psychologist best known for founding the Seattle Longitudinal Study in 1956. The Seattle Longitudinal Study took a 'life span' approach to aging and cognition, studying subjects from birth through the life course.