An absolute correlation coefficient of 0.26–0.49 was considered as low correlation, 0.5–0.69 moderate correlation, and 0.7 to 1.0 high correlation. Moderate to high correlation were considered as indicators of statistical significance.

E. Domholdt, Physical therapy research. (2nd ed.), W.B. Saunders Co, London (2000).

“强相关、中度相关和弱相关”之类的“名称”似乎是早期历史的思维方式——对于一维的数量分段命名，的确没必要再用了

要讲给“小朋友”听的，所以还是想“通俗”一些的，无非是个经验法则罢了。

其实Cohen也谈过这个问题的，很多初级读物中都有讲的，只是莫衷一是，想搜罗下各种说法。