11.6 Selected response items  (Page 2/2)

Strengths and weaknesses

All types of selected response items have a number of strengths and weaknesses. True/False items are appropriate for measuring factual knowledge such as vocabulary, formulae, dates, proper names, and technical terms. They are very efficient as they use a simple structure that students can easily understand, and take little time to complete. They are also easier to construct than multiple choice and matching items. However, students have a 50 per cent probability of getting the answer correct through guessing so it can be difficult to interpret how much students know from their test scores. Examples of common problems that arise when devising true/false items are in [link] .

In matching items, two parallel columns containing terms, phrases, symbols, or numbers are presented and the student is asked to match the items in the first column with those in the second column. Typically there are more items in the second column to make the task more difficult and to ensure that if a student makes one error they do not have to make another. Matching items most often are used to measure lower level knowledge such as persons and their achievements, dates and historical events, terms and definitions, symbols and concepts, plants or animals and classifications (Linn&Miller, 2005). An example with Spanish language words and their English equivalents is below:

Directions: On the line to the left of the Spanish word in Column A, write the letter of the English word in Column B that has the same meaning.

While matching items may seem easy to devise it is hard to create homogenous lists. Other problems with matching items and suggested remedies are in [link] .

Multiple Choice items are the most commonly used type of objective test items because they have a number of advantages over other objective test items. Most importantly they can be adapted to assess higher levels thinking such as application as well as lower level factual knowledge. The first example below assesses knowledge of a specific fact whereas the second example assesses application of knowledge.

Who is best known for their work on the development of the morality of justice?

1. Erikson
2. Vygotsky
3. Maslow
4. Kohlberg

Which one of the following best illustrates the law of diminishing returns

1. A factory doubled its labor force and increased production by 50 per cent
2. The demand for an electronic product increased faster than the supply of the product
3. The population of a country increased faster than agricultural self sufficiency
4. A machine decreased in efficacy as its parts became worn out

(Adapted from Linn and Miller 2005, p, 193).

There are several other advantages of multiple choice items. Students have to recognize the correct answer not just know the incorrect answer as they do in true/false items. Also, the opportunity for guessing is reduced because four or five alternatives are usually provided whereas in true/false items students only have to choose between two choices. Also, multiple choice items do not need homogeneous material as matching items do.

However, creating good multiple choice test items is difficult and students (maybe including you) often become frustrated when taking a test with poor multiple choice items. Three steps have to be considered when constructing a multiple choice item: formulating a clearly stated problem, identifying plausible alternatives, and removing irrelevant clues to the answer. Common problems in each of these steps are summarized in [link]