6m olds can understand words
Another new study - but I love the conclusion so here goes...
2) Four pictures were put on a screen. The gaze of the infant was tracked when the care-taker inquired about a known object (e.g. where is the apple?). Babies fixed their gaze on the correct object!
3) This word understanding seems to remain relatively unchanged until about 14 months, when it jumps dramaticallyYou can get more details here.