The Global Consciousness Project

In case anyone is wondering whether the midnight-midnight whole day events, for which Bancel proposed a different selection mechanism, behave any differently from events of similar duration whose start- and end-points can be chosen, here is a version of the chart in which they are separated out (shown as a red box):
[Image: ZvDuration2.jpg]
The answer is maybe, but the numbers are too small for the difference to be statistically significant. As the scaling behaviour suggests the end-point selection mechanism doesn't apply to these longer events, I'm not sure that we should expect a difference, or what it would mean if we found it.

Interestingly, the average Z value for the events longer than 20 hours with adjustable end-points is very similar to that for events longer than 6 and up to 20 hours. Although the overall effect size for the GPC (just over 0.3) would normally be classified as small, for these two groups of longer events, making up nearly a quarter of all the events, it is nearly 0.6, which would normally be described as medium to large.