What is the "30 million word gap"? The "30 million word gap" refers to a research study conducted by psychologists Betty Hart and Todd Risley . Their study showed that children from lower-income families hear a staggering 30 million fewer words than children from higher-income families by the time they are 4 years old.What is another word for gap?
gap, crack(noun) a narrow opening. "he opened the window a crack". Synonyms: go, quip, cracking, fracture, whirl, fling, spread, sally, crack, crack cocaine, fissure, wisecrack, interruption, pass, break, tornado, cleft, offer, snap, crevice, chap, disruption, opening, cranny, scissure, col, shot.