Tutorial: Other data
Example analysis of data of Kappenman et al. (2021)
As an example for how to use the toolbox to analyze data other than fMRI, here we apply Cross-validated MANOVA as well as Cross-validated Cross-MANOVA to data from Kappenman et al. (2021). Their ERP CORE resource provides experimental material and data from paradigms eliciting seven standard ERP components.
In particular, we use the data of subject 1 from their P3 paradigm. In the Supplementary Materials the authors write:
The P3 was elicited in an active visual oddball paradigm. […] On each trial, one of five uppercase letters (A, B, C, D, or E […]) was presented for 200 ms in the center of the screen over the fixation point. […] Participants completed a total of 200 trials, divided into five blocks of 40 trials each. In each block, one letter was designated the target stimulus and the other four letters were designated non-targets. Participants pressed one button for targets and another button for non-targets. Each of the five letters served as a target in one block of the experiment and as a non-target in the other four blocks, with the order of blocks randomized across participants. Each letter was presented with equal probability within a block of trials (p = .2), such that the target category was rare (p = .2) and the non-target category was frequent (p = .8).
The analysis is broken down into several steps in the following subpages: