After each guess they told student if right or wrong. 2 groups: one control, one group told that friendly labeled leebish" unfriendly grecious" (or vice versa) Found that groups using labels learned difference btw friendly and unfriendly faster. Showed students clay creatures with prominent heads, pointy limbs, students identified which were friendly or not; unfriendly had lumpy heads friendly had smooth; Usually language enhances thinking but can also screw us up. Study: russian and english speakers look at three blocks of color and say which two are the same; russian has different words for dark and light blue, english only has blue. Hypothesis: language is dominant on left side of brain then it should affect color perception in right visual field. If shown 2 dark and 1 light russian speakers responded faster than 3 dark or 3 light. English speakers responded same no matter the mix of shades. Another condition: made subjects do a task while color-matching.