Carmen Sergiou

Leiden University | LEI

Dear Community,

I am using the Mike Cohen script for Phase-Coupling. He analyses the Phase-coupling for the centre frequency of 5 hz, I want to look at the frequency bands instead.

How do I change this in the script that it will calculate this for example from 4-7 Hz?

load 'EC_I.mat'

% names of the channels you want to compute connectivity between

channel1 = 'Fz';

channel2 = 'Fp1';

% create complex Morlet wavelet

center_freq = 4;

time = -1:1/EEG.srate:1;

wavelet = exp(2*1i*pi*center_freq.*time) .* exp(-time.^2./(2*(4/(2*pi*center_freq))^2));

half_wavN = (length(time)-1)/2;

So how do I change the center_freq to a frequency band?

Thanks in advance!

Best,

Carmen

Dear All,

First of all I hope everybody is doing good in these weird times.

Second, I also have a question regarding a non converging factormodel. I translated a questionnaire from English to Dutch, and tried to validate it using an EFA, CFA and even parallel analysis up to 11 factors, but still no logical structure. Because we are also interested to see whether the psychometric properties of the questionnaire correlate with other self-report questionnaires that we conducted, we wanted to use te total score of the questionnaire to correlate with the other self-report.

Opinions are a bit divided within our team about the theoretical correctness of using a total score when the factor structure is not converging.

I was wondering what you as other researchers think about this and if there is a maybe another way of interpreting the psychometric properties of the questionnaire with the other self-report when the factor structure is not as planned?

Thank you so much in advance!