Hello,
I'm performing an EEG analysis using a creativity paradigm on BESA 6.0. I'd like to know if someone who knows the software can Skype with me to clarify some doubts concerning the analysis and its interpretation. If not, here are the details:
Paradigm: I am using a creativity paradigm, similar to Fink et al (2007). After presenting a fixation cue for 10s, the stimulus (which is a sentence) is presented for 15s. Then participants need to press a key before vocalising each response. The epoch of interest is [-250 to -1250s] before this keypress to measure creative ideation.
BESA Analysis: I require power estimates in the alpha and beta bands to analyse this data. I have done averaging of the epochs, but the FFT provides estimates of amplitude and frequency which seem skewed. For example, all frequency values end in .00 and when I compute an FFT Average, analyses give a constant value of 1.00 Hz for all 64 electrodes. Hence, I suspect that this is incorrect output, or that I am not interpreting it correctly.
I would like to know how I can obtain the numeric values of amplitude and frequency for each of the electrodes.
Thank you!
Congratulations on your research project. We are, however, on the field of Sciences of the Spirit, and in them the concrete objectivity is impossible, since the responses of the subjects / individuals are all different to the same stimuli. So many places in the brain, its bio-electric intensity as the perceptions of levels of individuals and their interpretation of reality styles are different. Therefore, talking of paradigms or creativity patterns is something extremely elastic, and forces to manipulate data or to condition responses. The electrodes do not measure the preceptive levels, emotions, feelings or affections of respondents.
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