Independent samples t-test

Description: The procedure is used to compare the means of two groups on a continuous dependent measure. Moreover, it assumes that scores on the dependent variable are independent, normally distributed, and exhibit constant variance between groups.

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Independent samples t-test using SPSS (short demo; April 2020): video, SPSS data file, Powerpoint

Independent samples t-test using Stata (April 2020): video, Stata data file, Powerpoint

Conceptual overview using Excel spreadsheet (July 2020): video, Excel file

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Independent samples t-test (Powerpoints) : Using SPSS; SPSS data file; Powerpoint on how to compute by test by hand)

The following video and Powerpoint contains information on how to calculate Cohen's d for the independent samples t-tests (along with the one-sample and paired-samples t-tests). The Excel calculator is also provided for your convenience.

Video on Cohen's d, SPSS data file, Powerpoint, Excel calculator