[FieldTrip] Absolute wPLI-values vary depending on trial length

[daniel.strahnen at uni-ulm.de]

Dear FieldTrip-Community,

 

For the analysis of a continuous recording I used the function
ft_redefinetrial to cut the data into chunks.

However, I was experiment with different trial length and their impact on
the wPLI.

Doing this I discovered that the absolute values of the wPLI spectrum
plummet significantly with a shorter trial length, although the

characteristics and the form of the spectrum stay the same.

 

My question therefore is if there is a reasonable explanation for this
phenomenon and what might be considered the optimal trial length? The
sampling rate is 1 kHz.

 

Thank you very much and best regards

 

Daniel

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