Larry, a 10-year-old, first sees two identical glasses with water at the same level; then, the water from one of the short, wide glasses is poured into a taller, thinner glass. Larry will likely conclude that
A) there is more water in the taller, thinner glass.
B) there is more water in the shorter, wider glass.
C) there are equal amounts of water in the shorter, wider and taller, thinner glasses.
D) there are equal amounts of water in the two identical glasses only.
E) all of the glasses have the same amount of water.

Question

Quizplus · Accepted Answer

At 10 years old, Larry is likely in the concrete operational stage of cognitive development, where he understands the concept of conservation, realizing that the amount of water remains the same despite changes in the shape of the container.

Larry, a 10-Year-Old, First Sees Two Identical Glasses with Water