PSYC 3250 Chapter Notes - Chapter 4: Factor Analysis, Linear Regression, Standard Deviation
22 Mar 2016
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Document Summary
The process of assigning numbers to objects in such a way that speciic properies f objects are faithfully represented by properies of number. Psychological measurement: is concerned with atributes of people rather than objects. Cornerstone of psychological measurement is the assumpion that individuals difer: diferences are stable. Goal is to translate these diferences into quanitaive (numeric) terms. Diferences may not be necessarily large or permanent and do not indicate people"s inherent worth. Tests only tell us in what ways people are similar or diferent. Nominal scales: scale of measurement in which numbers are used to classify and idenify persons, numbers are subsituted for names, ex. males = 1, females = 2. Ordinal scale: people are ranked, ex. people"s placings in a race. Whether the tests are beter than other measurement and decision-making techniques. The consistency of test scores when taking the test several imes. Must assign scores in a consistent fashion: validity.
