DeLoache, Miller, & Rosengren (1997) had 2½-year-olds and 3-year-olds watch an adult hide a toy in a full-size room, then asked them to try to find the toy in a scale model of the room. They found that

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The study found that only the 3-year-olds could find the toy in the scale model. The 2½-year-olds were not able to successfully transfer their knowledge from the full-size room to the smaller scale model.

DeLoache, Miller, & Rosengren (1997) Had 2½-Year-Olds and 3-Year-Olds Watch