Important topics should be weighted more heavily than less important
topics
Testing time devoted to each topic should reflect the relative
importance of the topic
Sample of items should be representative of instructional goals
General Guidelines for Item Construction
Make sure the item can be answered without looking
at the options OR that the options are 100% true or false.
Include as much of the item as possible in the
stem; the stems should be long and the options short.
Avoid superfluous information.
Avoid "tricky" and overly complex items.
Write options that are grammatically consistent and
logically compatible with the stem; list them in logical or alphabetical
order.
Write distracters that are plausible and the same
relative length as the answer.
Avoid using absolutes such as always, never, and
all in the options; also avoid using vague terms such as usually and
frequently.
Avoid negatively phrased items (i.e., those with except or not in the
lead-in). If you must use a negative stem, use only short (preferably
single word) options.
And most important of all: Focus on important concepts; don’t waste
time testing trivial facts.
Flaws that Tip Off Students to the Correct Answer
Grammatical cues - one or more distracters don’t follow grammatically
from the stem.
Logical cues - a subset of the options is collectively exhaustive.
Absolute terms - terms such as "always" or "never" are in some
options.
Long correct answer - correct answer is longer, more specific, or more
complete than other options.
Word repeats - a word or phrase is included in the stem and in the
correct answer.
Convergence strategy - the correct answer includes the most elements
in common with the other options.
Flaws that Make Items Unnecessarily Difficult
Options are long or complicated, or contain duplicated portions.
Numeric data are not stated consistently.
Terms in the options are vague (examples--"rarely," "usually").
Language in the options is not parallel.
Options are in an illogical order.
"None of the above" is used as an option.
Stems are tricky or unnecessarily complicated.
The answer to an item is "hinged" to the answer of a related item.