Assessing a learning process with functional ANOVA estimators of EEG power spectral densities
- 374 Downloads
We propose to assess the process of learning a task using electroencephalographic (EEG) measurements. In particular, we quantify changes in brain activity associated to the progression of the learning experience through the functional analysis-of-variances (FANOVA) estimators of the EEG power spectral density (PSD). Such functional estimators provide a sense of the effect of training in the EEG dynamics. For that purpose, we implemented an experiment to monitor the process of learning to type using the Colemak keyboard layout during a twelve-lessons training. Hence, our aim is to identify statistically significant changes in PSD of various EEG rhythms at different stages and difficulty levels of the learning process. Those changes are taken into account only when a probabilistic measure of the cognitive state ensures the high engagement of the volunteer to the training. Based on this, a series of statistical tests are performed in order to determine the personalized frequencies and sensors at which changes in PSD occur, then the FANOVA estimates are computed and analyzed. Our experimental results showed a significant decrease in the power of \(\beta\) and \(\gamma\) rhythms for ten volunteers during the learning process, and such decrease happens regardless of the difficulty of the lesson. These results are in agreement with previous reports of changes in PSD being associated to feature binding and memory encoding.
KeywordsNeurocognitive phenomics Electroencephalography Brain rhythms Power spectral density Functional ANOVA Learning
This work was supported by the Mexican Council of Science and Technology (Conacyt) through Grant 220145.
- Berka C, Levendowski D, Westbrook P, Davis G, Johnson R, Popovic D (2010) Interactive psychophysiological profiler method and system. US Patent App. 12/466,263Google Scholar
- Duch W (2013) Brains and education: towards neurocognitive phenomics. In: Reynolds N, Webb M, Sysło MM, Dagiene V (eds) Learning while we are connected, vol 3. Citeseer, pp 12–23Google Scholar
- Gutiérrez D, Ramírez-Moreno MA, Lazcano-Herrera AG (2015) Assessing the acquisition of a new skill with electroencephalography. In: Proceedings of the 7th annual international IEEE EMBS conference on neural engineering. IEEE, pp 727–730Google Scholar
- Ramsay JO (2006) Functional data analysis. Wiley Online LibraryGoogle Scholar
- Yucha C, Montgomery D (2008) Evidence-based practice in biofeedback and neurofeedback. AAPB, Wheat RidgeGoogle Scholar