If You Try Out 150 Items to Get the Best

question 22

Multiple Choice

If you try out 150 items to get the best 20 items for your test using a relatively small sample of cases (N = 30) , what process should be used to obtain the true item statistics for the 20 items you have selected?

• A) item selection
• B) cross-validation
• C) Spearman-Brown procedure
• D) item analysis

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Definitions:

Vertical Exaggeration

A scale manipulation technique used in topographical maps or models to emphasize the vertical features by increasing their height relative to the horizontal aspects.

Permeability

The ability of a material, such as rock or soil, to allow fluids to pass through it, important in determining the movement of water and hydrocarbons in the Earth.

Water Table

The upper surface of the zone of saturation in the ground where soil or rocks are permanently saturated with water.

Topography

The arrangement of natural and artificial physical features of an area, including its relief, and the position of these features.