The four components of a Stanford-Binet IQ test are verbal reasoning, abstract and visual reasoning, quantitative reasoning and short-term memory. The test comprises of six to 15 sub-tests. The test taker's age determines how many sub-tests are administered. The scores of these sub-tests are scored under the four main components.
The verbal reasoning portion scores verbal knowledge and ability to adapt verbal skills to unfamiliar situations. Sub-tests under the verbal reason category are word knowledge, social judgment and awareness, ability to isolate the inappropriate feature in visual material, social intelligence and the ability to differentiate essential from non-essential detail.
The abstract and visual reasoning portion scores the ability to understand and perform mathematical operations and grasp visual patterns, and it assesses visual and motor skills and problem solving through reason.
The quantitative reasoning portion scores numerical reasoning, knowledge and demonstration of numerical concepts, and concentration.
The short-term memory portion scores concentration ability, short-term memory recall and sequencing skills. Sub-tests under this category test visual and auditory short-term memory.
The scores of the test are determined by the average number of correct answers given by participants within the same age range. Scores of 100 are considered average, while scores above 115 or below 85 indicate exceptional intelligence or developmental problems.