PSYC 2520 Chapter Notes - Chapter 6: Convergent Validity, Concurrent Validity, Criterion Validity

• School: York University
• Department: Psychology
• Course: PSYC 2520
• Professor: Josee Rivest

Document Summary

Reliability implies consistency or stability, but it may also imply dependability. Internal-consistency reliability is the overall degree of relatedness of all items in a test or all raters in a judgement study (also called reliability of components). Researchers prefer validity and reliability to be as high as possible. It can be represented by a correlation coefficient between the scores on the test administered at those two different times: understood as a measure of stability. The pearson r measures the strength of association (the degree of relatedness) of two measured variables, such as height and weight. It ranges from 1. 0 through 0 to +1. 0. Internal-consistency reliability refers to the degree of relatedness of the individual items on a test. When all the item variances are equal, the estimates of internal-consistency reliability obtained from the two methods and the spearman-brown formula should be identical.