The Optimal Level of Item Difficulty Is MOST Typically

question 6

Multiple Choice

The optimal level of item difficulty is MOST typically

• A) .5.
• B) the midpoint between 1.0 and the chance of success by random guessing.
• C) .25.
• D) the midpoint between 0 and the chance of success by random guessing.

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Definitions:

Sedimentary Layer

A layer of sedimentary rock which has been deposited over time, often distinguishable from other layers by its composition and color.

Granite

A coarse-grained igneous rock composed mainly of quartz and feldspar.

Stromatolites

Layered structures formed by the growth of microbial mats, often found in fossil form and considered some of the oldest evidence of life on Earth.

Microscopic Creatures

Tiny organisms that can only be seen with the aid of a microscope, including bacteria, protozoa, and some fungi and algae.