Fig. 2: Two-dimensional heatmap relating participants to their language comprehension abilities.

The 15 language comprehension abilities are shown as rows. The dendrogram representing language comprehension abilities is shown on the left. Participants are shown as 17,848 columns. The dendrogram representing participants is shown on the top. The green bar labels the command mechanism, the red bar labels the modifier mechanism, and the blue bar labels the syntactic mechanism. The center grid indicates the presence or absence of each ability in each participant: blue signifies the presence of a linguistic ability (“very true” answer), red indicates its absence (“not true” answer), and white represents a partial presence (“somewhat true” answer).