This Woolley paper [0] cited in the article gives three reasons for effective teams. The NYT only tells you two behaviors. True enough. The third is not a behavior. It is "the proportion of females in the group".
Paper says "Finally, c was positively and significantly
correlated with the proportion of females in the
group (r = 0.23, P = 0.007). However, this result
appears to be largely mediated by social sensitivity
(Sobelz = 1.93, P = 0.03), because (consistent
with previous research) women in our sample
scored better on the social sensitivity measure
than men [t(441) = 3.42, P = 0.001]. In a regression
analysis with the groups for which all three
variables (social sensitivity, speaking turn variance,
and percent female) were available, all had
similar predictive power for c, although only
social sensitivity reached statistical significance
(b = 0.33, P = 0.05)."
It seems to make sense to not cite that as an additional factor, given that it is almost fully mediated by one of the factors already listed. There is an interesting observation in here that women have on average higher social sensitivity, though it looks like measuring social sensitivity directly in job interviews and other team building processes is just more effective than looking at gender (though a bit harder to do, I would guess).
Paper says "Finally, c was positively and significantly correlated with the proportion of females in the group (r = 0.23, P = 0.007). However, this result appears to be largely mediated by social sensitivity (Sobelz = 1.93, P = 0.03), because (consistent with previous research) women in our sample scored better on the social sensitivity measure than men [t(441) = 3.42, P = 0.001]. In a regression analysis with the groups for which all three variables (social sensitivity, speaking turn variance, and percent female) were available, all had similar predictive power for c, although only social sensitivity reached statistical significance (b = 0.33, P = 0.05)."
[0] https://www.cs.cmu.edu/~ab/Salon/research/Woolley_et_al_Scie...