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Dear Tracula experts,
I want to compare two groups according to the length statistics from Tracula overall.stats outputs. I just need comprehensive explanations what "tract length" statistics mean and how they are derived and what their reliability is. I checked but I couldn't find detailed information.
Are they suitable to use in group comparisons? If so, which one is more suitable to use: average, center, min or max length? I saw in some articles that they used average_length of a tract. If I want to use length statistics do you suggest taking any control variables?
I read a message from Anastasia in the archive-list saying that we should be aware that these measures are in their individual DWI spaces. If I understood correctly, I shouldn't use them directly. Should I control the head sizes of the individuals then? How would you do if you wanted to do this kind of comparative analysis?
I would really appreciate it if you answer. Thank you very much in advance!
Best regards, Nazife