Linear mixed effect model in SPSS

based on Brown (2021)

The menus for mixed effects models in SPSS are a little unintuitive (Andy Field calls it an "indecipherable interface"). Here, we use SPSS syntax to replicate the result that we had in R.

This spss activity is really short

Step 1 - import the data

Use text/csv import to read in the "rt_dummy.csv" file that you already downloaded.

Step 2 - run the mixed effects model

Start a new SPSS syntax window and type out the MIXED command like this:

It may take a long while to run. The output is similar to what we've seen before if you focus on the "Estimates of Fixed Effects" (example below)

Interested in learning more about linear mixed models in SPSS?

• Check out this walkthrough of an analysis of sleep deprivation reaction time data - by Clay Ford, Statistical Research Consultant, University of Virginia Library