Table 1. Slopes of utterance length quartiles temporal regression lines.

Subset	Q1		Median (Q2)		Q3
	Slope	r 2	Slope	r 2	Slope	r 2
	(chars./year)		(chars./year)		(chars./year)
All	−2.53	0.916	−5.20	0.926	−8.32	0.862
Sep–Dec	−5.29	0.812	−7.85	0.894	−9.97	0.889
Resampled	−2.54	0.918	−5.25	0.927	−8.23	0.860
URLs removed	−2.42	0.933	−4.63	0.922	−7.51	0.887
English only	−3.38	0.910	−5.95	0.881	−8.35	0.785
2010–2012	−5.19	0.842	−8.07	0.910	−10.4	0.938
Trending topics	−3.41	0.153	−6.83	0.294	−7.61	0.440
Outside US	−5.57	0.838	−8.15	0.904	−10.4	0.909