Exploring the organization of semantic memory through unsupervised analysis of event-related potentials

Analysis code for:

Marijn van Vliet, Marc M. Van Hulle and Riitta Salmelin, "Exploring the organization of semantic memory through unsupervised analysis of event-related potentials", Journal of Cognitive Neuroscience.

Data

The main data used for the analysis in the notebooks is stored in this repository as data.csv. In addition, some psycho-linguistic data for the stimuli is available in psycho_linguistic_variables.csv.

For access to the EEG data and the N400 template, please contact Marijn van Vliet.

Notebooks

1. Hierarchical clustering based on N400 amplitude
2. Exploration of possible confounding psycho-linguistic variables
3. Effect of the judgement-of-association task

Requirements

To run the notebooks, the following Python packages are required:

• numpy
• scipy
• pandas
• matplotlib
• rpy2

And the following R packages:

• lme4
• lmerTest