Kazimierz Dąbrowski, in his Positive disintegration theory talks about overexcitability as the most evident aspect of developmental potential. He distinguishes five types of overexcitabilties: psychomotor, sensual, intellectual, imaginational and emotional. The emotional excitability, according to the Wikipedia
is characterised by heightened, intense feelings, extreme experience of complex emotions, identification with others' feelings to the point of actual experience and strong sentimental expression
These overexcitabilities tend to be present to different extents in gifted people, so it seems reasonable to think that in this case, a deeper capability of feeling emotions is linked to a higher intellectual intelligence.
Does this also happen in the wild? Are there any studies that not only establish the intellectual development of the species that surround us, but also their capability to feel emotions, and any correlation between that?
Ultimately, is intellectual intelligence development associated to emotional development? Are emotions needed to develop intellectual intelligence in a species?