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A cross-sectional study is one in which

The principle that properties such as mass, volume, and number remain the same despite changes in the forms of objects is called

Five-year-olds who were surprised to discover that a Band-Aids box contained pencils were able to anticipate their friend’s false belief about the contents of the box. This best illustrates that the children had developed a

The term menarche refers to the

Infant monkeys raised with a nourishing wire mother and a nonnourishing cloth mother

The term social clock refers to

Children’s tendency to classify toys and songs as either masculine or feminine is most likely to facilitate the process of

Nutrients and oxygen are transferred from a mother to a fetus through the

A critical period is a phase during which

On which of the following tasks are 55-year-old adults most likely to perform just as effectively as they could 30 years earlier?