PSYA02H3 Chapter 10: Psychology Chapter 10.docx
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PSYA02H3 Full Course Notes
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Cross-sectional design: used to measure and compare samples of people at different ages at a given point in time. They"re cheap, quick and easy to administer but people can suffer from cohort effects: differences between people that result from being born in different time periods. Example: studying cognition from infancy to adulthood, compare people of different age groups. Longitudinal design: follows the development of the same set of individuals through time. This study fixes cohort effects but following a single group of people for a long period of time can be very costly and time-consuming. It often suffers from the problem of attrition: which occurs when participants drop out of a study ( lose interest, move away ) To account for both slow and rapid periods of growth, development is seen as a progression of abrupt transitions in physical or mental skills, combined with slower changes. This pattern described as a series of stages.
