PSY-B - Psychology PSY-B 311 Lecture Notes - Lecture 5: Central Tendency, Squared Deviations From The Mean, Frequency Distribution
27 Sep 2016
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Describes the characteristics or behaviors of a given population. Cross sectional design: single group (sample) studied at one single time. May be a single sample of students from one university, or several samples from several different universities. May be participants divided into groups of different ages. But study all done at the same time. Successive independent samples design: two or more different samples studied at different points in time. Potential problem: must select each sample in same way each time. Longitudinal or panel survey design: same group(s) of participants questioned on more than one occasion over time. Describes patterns of basic life experiences and events e. g. , birth, marriage, divorce, employment, migration, death. Occurrence of disease in different groups of people. Goal: obtain a representative sample from a population. To obtain accurate unbiased estimates of characteristics of the population. Sampling error: amount the results from sample differ from what would be obtained from the whole population.
