it is referenced in the first paragraph
>In texts, both fictional and non-fictional and in English and Spanish, thinking words relating to technology and social organization (experiment, gravity, weigh, cost, contract) become more common between 1850 and approximately 1977 (beginning of the great stagnation) but since then thinking words have declined markedly and feeling words relating to belief, spirituality, sapience, and intuition (e.g. forgiveness, heal, feel) have become more common.
the deliberate inclusion of such an unrelated reference (in the context of the paragraph) makes me believe the author is trying to emphasis a possible negative correlation / outcome to the discussed phenomena
his off handed remarks on how "femininity" may be the cause the discussed phenomena would then also be a cause of the referenced outcome mentioned above, if the aforementioned assumptions hold true
on a side note, I would comment by saying that the author including his speculative commentary in a discussion of a scientific paper is the height of "thinking over feeling"