A longitudinal study is a type of ____ research study that involves looking at ____ over an extended period of ____ This research can take place over a period of ____ months, or even ____. Longitudinal studies treat "time" as one of their independent variables (IV). They test people at ____ points in time. However, not all longitudinal studies are interesting in ____. Longitudinal studies ____ a group of people at the same point in time - the ____. There are two types of longitudinal design: ____ (or historic) studies take a cohort who all ____ up the same way (eg developing schizophrenia), then "work back" through their lives to identify factors in the past that might have ____ this. ____ studies take a cohort who don't have anything ____ in common and follow them to see if they start differing from each other "into the ____".

Week 12 Psy Longitudinal Study

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