Complex sentence: On the other hand, the acquired skill sets and reservoir of knowledge were deemed more robust over time, and less related to age, such that, once accumulated, crystallized intelligence was autonomous of fluid intelligence Cattell, R. B. (1971).
Split into simpler sentences: On the other hand, the acquired skill sets and reservoir of knowledge were deemed more robust over time, and less related to age. In other words, once accumulated, crystallized intelligence was autonomous of fluid intelligence Cattell, R. B. (1971).