The P300 in response to deviant or infrequent stimuli in oddball task is the fact with general consensus, But if the frequent stimuli have different arousal or valence (emotional faces), is the positive peak between 300-600 ms in Fz, Cz,Pz be P300?
Dear Malahat! Unfortunately, no consensus on this issue. Please see the article on this topic.
Dear prof. Kulchitsky
unlimited thanks for your scientific comments, but I wonder whether the amplitude of frequent stimuli in oddball task(10% rare(home)-90% frequent(emotional face)) could be compare with each other, and also is this component P300. This result is interesting but I doubt that this component is P300.
regard
Now you have explained more clearly. Please, read the article in the application.
Dear prof. Kulchitsky
Thank you, I have read it. on that article the authors analysis the target stimuli too.
regard
- Dear Mahalati, although the odd-ball method is the most commonly used, but is not mandatory for P300. The odd-ball reinforce the amplitude of the response due to the phenomenon "rare or uncommon". However, P300 can be obtained using 50-50% distribution frequencies. The appearance of P300-frequent, is possible according to the explored person, such as may occur in ADHD.That is, as in all laboratory work, the answer. That is, as in all laboratory work the response depend on the design, method and objective
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