The researchers also undertook a correlational analysis which included size of the corpus callosum, and test scores scores on language, visual spatial and finger dexterity tests.
From the sciencedaily.com
Many of the studies I mentioned above are largely based on mouse models of disease, or on large-scale sequencing analysis and correlational studies.
From the scienceblogs.com
The authors cautioned that the correlational nature of the study did not allow for an analysis of causality.