PSYC 3330 Chapter Notes - Chapter 15: Working Memory, Episodic Memory, Memory Span
2 Dec 2016
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Document Summary
A sample of people, preferably selected so as to reflect the full range of the population, will be tested repeatedlu. Longitudinal designs: the same participants are successively tested at different ages. Measures of cognition and memory (i. e. practice effects) Different groups of people are sampled across the age range and their performance is measured on a single occasion. Limitation: one cannot related performance to earlier data, or to future development of the individual. Cohort effect: the tendency for people born at different time periods to differ as a result of historic changes in diet, education and other social factors. A solution is to combine longitudinal and cross-sectional by adding a new cohort of participants at each test point. Comparison od thses initial test groups across the years will provide a measure of any cohort effects, while comparing them with the relevant longitudinal group of that age will give an indiciation of learning effects.
