While Playing a Game, a 9-Month-Old Infant Tries to Grab

question 25

Multiple Choice

While playing a game, a 9-month-old infant tries to grab slow-moving balls, but doesn't try for fast-moving balls. Research by van Hof suggests that 9-month-olds _____.

• A) can catch, and so have experience with which balls are catchable
• B) understand inertia intuitively, and realize that it is easier to stop a slower ball
• C) cannot see the faster moving balls clearly, so they don't try for them
• D) understand that slower moving balls afford catching more than faster moving balls do

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Definitions:

Infertile Couples

Couples who are unable to conceive a child after one year of regular, unprotected intercourse.

Conceive

To form a notion, idea, or plan in the mind.

Randomly Assigned

Random assignment is a method used in experiments to place participants into different groups using randomization, which helps ensure that each group is similar at the start of the experiment.

Experimental Group

In an experiment, the group that is exposed to the treatment, that is, to one version of the independent variable.