AP (Advanced Placement) Psychology History, Approaches & Research Methods-Statistics, Research Methods & Ethics Revision (Page 1 of 2)

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Understanding Reliability and Validity – Its Types

Statistics are an important part of creating new tests or measures. They ensure that the measures are on target.

Tests are standardized (or tried out on huge groups of people) and generalized so that they create norms.

  • Criterion-referenced tests measure

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Test of Significance and its Types

Which tests of significance you use depends on the characteristics of your sample and of your dependent variable. The most commonly used tests of significance are the followings:

  • T-tests compare the means of two different groups to see if the

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Introducing the Fundamental Terms in Statistics

Statistics is the process of representing numerical data so that it can be interpreted. Good statistics help derive a conclusion of the sample. The five most common forms of descriptive statistics are:

Percentiles are used most commonly on standardized tests.

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What is Inferential Statistics?

  • Inferential statistics allow you to generalize findings from a sample to a population that is the larger group from which the sample was drawn. Statistics refer to numbers that describe a sample, and parameters refer to numbers that describe populations.
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What is a Research Design?

Search design refers to what does a researcher do in order to get at the logic of his hypothesis. Different questions call for different approaches, and some approaches are more “scientific” than others.

Scientific approach to the study of psychology

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