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Are you aware that this quote you found doesn't help the point you are trying to make? You want to prove there is no significant correlation between intelligence, yet you show us that despite it not being cleared of other factors, the correlation still persists and would actually be even higher if we factored the other aspects out.
I completely agree, and I have been emphasizing this point since you previously suggested the existence of a canon for classifying correlation values as high, moderate, or low. So, yes, it is indeed subjective, depending on the context of the research. Plus, authors are free to devise their own classifications.By the way, considering 0.3 coefficient as significant is very subjective.
You don't say. The fact that 0.3 is closer to zero than to one doesn't render it insignificant. Again, its significance depends on the context. In particle physics, you might as well discard research showing a correlation of 0.3, but that doesn't hold for many other fields.From a purely mathematical perspective, In terms of absolute distance from 0, a correlation coefficient of 0.3 is closer to 0.
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