Instructions for SPSS

 

Reading the data
Open SPSS. Choose File and select open ASCII data. Retrieve the dataset and click on freefield. First column is the condition (name: condition) variable and is a numeric variable. Click add. The second column is the rating variable (name: rating) and is a numeric variable. Click ok. Save data as an SPSS file.

To compute independent-samples t-test
Choose Statistics, then Compare means. Select Independent-samples t-test. Move treatment variable into group variable box. Move rating variable into test variable box. Click ok.