On Monday, September 2, 2013 2:35:43 PM UTC-4, Brent wrote: > > On 9/2/2013 9:48 AM, Craig Weinberg wrote: > > "Finally, there was a pronounced difference in the effect of regressing >> out *spontaneous* activity on the left SMC BOLD-behavior relationship >> with instructed versus *spontaneous * force variability. With * >> spontaneous* force variability, regression of *spontaneous* (right SMC) >> activity all but eliminated the left SMC BOLD-behavior relationship. In >> contrast, with instructed force variability regressing out >> *spontaneous*activity increased the significance of the left SMC >> BOLD-behavior effect. >> This improvement in significance suggests that regression of *spontaneous >> * activity removed noise that was independent of the BOLD-behavior >> effect in the instructed condition. This finding is important as it shows >> that an ipsilateral response alone is not sufficient to eliminate the >> BOLD-behavior effect by regression as seen with* spontaneous* force >> variability. >> >> *In summary, there are three pronounced differences between spontaneous >> and instructed force variability in the current experiment: (1) the >> reversal of the time course magnitudes, (2) the difference in the timing of >> the significant BOLD-behavior effect, and (3) the difference in the effect >> of regressing out spontaneous activity. As such, we can be relatively >> confident that spontaneous and instructed force variability represent >> distinct phenomena in the current experiment. "* >> > > The study speaks for itself. What I think it means is what the researchers > also think it means. I don't know what you could imagine it would mean > otherwise. Spontaneous is used here in an ordinary way, not in some obscure > medical jargon which somehow actually means "anything but spontaneous". The > whole experiment is about isolating spontaneous activity from other types > of activity which respond to known conditions. > > You are welcome to explain exactly what you think this study shows in your > terms, but don't bother if you are just going to throw out unsupported > opinions. > > > It's just like my clock. Every couple of days it gets some external > stimuli: I wind it up. In between its activity is all spontaneous. > > Except the experiment shows *conclusively* that the activity is the same whether the clocks are wound or not.
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