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Longitudinal Research Designs:Advantages and Disadvantages, with special references to the Scandinavian project Metropolitan

Longitudinal Research Designs:Advantages and Disadvantages, with special references to the Scandinavian project Metropolitan

Abstract

Longitudinal Research DesignsAdvantages and Disadvantages, with special references to the Scandinavian project Metropolitan SAGE Publications, Inc.1970DOI: 10.1177/002071527001100403 Kaare Svalastoga University of Copenhagen, Copenhagen, Denmark RESEARCH designs may conveniently be classified as either simultaneous (cross-sectional) or sequential (longitudinal). The distinctive characteristic of a simultaneous design is that all variables observed are referred to the same point or the same usually brief period on the time dimension.,, Hence, in such studies time, and whatever is highly correlated with it, function as constants. It follows that all hypotheses on relationship between variables confirmed or rejected in such studies refer to conditions existing at the given time. We are in particular unable to perform any tests of hypotheses that state a relationship between variables, when one precedes the other, or between variables constructed so as to measure increment from one point in time to another. Sequential research designs permit both the kinds of static tests typical of simultaneous analysis, and the dynamic tests just mentioned. Hence, they must in general be deemed superior to simultaneous designs. They are, as noted by Zetterberg (1963), more sensitive in the sense that they offer a better protection against accepting hypotheses when they are wrong, and
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