You Place Five Pennies in a Row and Then Take

question 459

Multiple Choice

You place five pennies in a row and then take five more pennies and place them in a row directly below the other, so that the pennies in the two rows are paired. Your five-year-old son tells you that there are the same number of pennies in each row. You then spread out the pennies on the bottom row so that it looks longer. Your son now thinks that the bottom row has more pennies, showing that he lacks

• A)conservation.
• B)object permanence.
• C)assimilation.
• D)egocentrism.

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Definitions:

Articular Surfaces

The surfaces of bones that come into contact with one another to form joints.

Range of Motion

The full movement potential of a joint, usually its range of flexion and extension.

Glenohumeral Joint

The ball and socket joint between the head of the humerus and the glenoid cavity of the scapula, facilitating shoulder movement.

Lateral Excursion

The side-to-side movement of the mandible (lower jaw), which plays a key role in the process of chewing food.