Paired Samples T-Test in Psychological Research
Explore the paired samples t-test process and results in psychology research, comparing pretest and posttest knowledge scores to assess differences. Learn how to conduct and interpret this statistical analysis using SPSS in social sciences.
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Presentation Transcript
SPSS SPSS Statistical Package for Social Sciences Paired Samples t-test Department of Psychology California State University Northridge www.csun.edu/plunk
Paired samples t Paired samples t- -test Paired samples t-test examines differences between two dependent measures (e.g., pretest/posttest, time 1 / time 2). test
Paired samples t Paired samples t- -test test Move over the pretest and posttest into variable1 and variable2. Click on OK
Paired samples t Paired samples t- -test Paired samples t-test indicated the posttest knowledge score (M = 1.06, SD = 0.96) was significantly higher than the pretest knowledge score (M = 0.64, SD = 0.85); t(3671) = -34.21, p < .001. test
