Longitudinal Designs
Children experience rapid physical changes through infancy and early childhood. In a longitudinal study, a researcher observes many individuals born at or around the same time and observes them as they age. (credit "left": modification of work by Kerry Ceszyk; credit "middle-left": modification of work by Kristi Fausel; credit "middle-right": modification of work by "devinf"/Flickr; credit "right": modification of work by Rose Spielman)
Source
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"CNX Psychology, Psychology. August 4, 2015."
http://cnx.org/contents/4abf04bf-93a0-45c3-9cbc-2cefd46e68cc@4.100:52/Psychology
OpenStax CNX
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