tag:blogger.com,1999:blog-12602489.post6950450347138462440..comments2024-03-24T15:07:18.773+01:00Comments on The Stuttering Brain: Ludo Max's talk in ParisTom Weidighttp://www.blogger.com/profile/02084153394215001999noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-12602489.post-28889701054491575442008-05-22T08:22:00.000+02:002008-05-22T08:22:00.000+02:00Thx Ludo. I wasn't aware that the overlap was quit...Thx Ludo. I wasn't aware that the overlap was quite small. Glad to have clarified this issue! I guess a bigger sample would give us more confidence on the real overlap.<BR/><BR/>Best wishes.<BR/>TomTom Weidighttps://www.blogger.com/profile/02084153394215001999noreply@blogger.comtag:blogger.com,1999:blog-12602489.post-81085102050059286482008-05-22T08:20:00.000+02:002008-05-22T08:20:00.000+02:00Tom, the one thing that I have to disagree with (s...Tom, the one thing that I have to disagree with (simply because the data show otherwise) is your argument that experiments like the visuomotor rotation one can show only group average differences. In a poster (Progress in Motor Control in Brazil, August 2007) and talk<BR/>(Society for Neuroscience, San Diego, November 2007) that we have already presented and the manuscript that is in preparation (to be submitted this Summer) we did/do include individual subject data which demonstrate that this is not just a difference that is only noticeable<BR/>in the group averages. Of course, there are many variables that can be measured as the dependent variables of interest and the actual measurements that we derive are not actually measures of "skill." Rather we measure things such as the abruptness of the subjects'<BR/>initial adaptation (how quickly and how much do they adapt initially when the sensorimotor environment is first changed) and how slow or how fast learning still continues after that. If we look at the measurements that reflect the initial abruptness of the subjects's<BR/>adaptation, then your argument that some of the stuttering subjects do better than the nonstuttering subjects does not hold. In this particular experiment (reaching movements with a visuomotor rotation), 7 of the 10 nonstuttering subjects show a larger/faster initial adaptation than do<BR/>_ALL 10_ the stuttering subjects. In other words, all 10 stuttering subjects have low values (for that particular measure) that are in the same range as those of the three lowest nonstuttering subjects. Thus, even in behavioral experiments, the amount of overlap in the<BR/>individual subject data can be extremely small. In fact, it is a great advantage of behavioral experiments that it is possible to examine individual subject data.Anonymousnoreply@blogger.com