The terms intelligence, ability, and aptitude are often used interchangeably to refer to behavior that is used to predict future learning or performance. However, subtle differences exist between the terms. And the tests designed to measure these attributes differ in several significant ways.
Like intelligence tests, aptitude tests measure a student's overall performance across a broad range of mental capabilities. But aptitude tests also often include items which measure more specialized abilities--such as verbal and numerical skills--that predict scholastic performance in educational programs.
Compared to achievement tests, aptitude tests cover a broader area and look at a wider range of experiences. Achievement tests tend to measure recent learning and are closely tied to particular school subjects.
Aptitude tests tell us what a student brings to the task regardless of the specific curriculum that the student has already experienced. The difference between aptitude and achievement tests is sometimes a matter of degree. Some aptitude and achievement tests look a lot alike. In fact, the higher a student goes in levels of education, the more the content of aptitude tests resembles achievement tests. This is because the knowledge that a student has already accumulated is a good predictor of success at advanced levels.
Research data show that individually administered aptitude tests have the following qualities:
In addition, group aptitude tests--usually given as part of a group achievement battery of tests--can be given quickly and inexpensively to large numbers of children. Children who obtain extreme scores can be easily identified to receive further specialized attention. Aptitude tests are valuable in making program and curricula decisions. They can also be used for grouping students as long as grouping is flexible.
In general, aptitude test results have three major uses:
Instructional
Teachers can use aptitude test results to adapt their curricula to match the level of their students, or to design assignments for students who differ widely. Aptitude test scores can also help teachers form realistic expectations of students. Knowing something about the aptitude level of students in a given class can help a teacher identify which students are not learning as much as could be predicted on the basis of aptitude scores. For instance, if a whole class were performing less well than would be predicted from aptitude test results, then curriculum, objectives, teaching methods, or student characteristics might be investigated.
Administrative
Aptitude test scores can identify the general aptitude level of a high school, for example. This can be helpful in determining how much emphasis should be given to college preparatory programs. Aptitude tests can be used to help identify students to be accelerated or given extra attention, for grouping, and in predicting job training performance.
Guidance
Guidance counselors use aptitude tests to help parents develop realistic expectations for their child's school performance and to help students understand their own strengths and weaknesses.
Although studies seem to suggest that aptitude test scores cannot be improved, other research shows that that may not be the case. Tests such as the Scholastic Aptitude Tests contain many questions that are content-specific, particularly in math areas. Performance on these specific types of items is trainable.
Some experts feel that short-term cramming might not affect aptitude test scores. However, long-term instruction in broad cognitive skills might improve general test performance. Cognitive theory and research suggest that learning ability can be improved by training students in learning strategies. Improving academic aptitude may be possible through a systematic curriculum that complements direct training in learning strategies with both the development of general thinking approaches and the application of those approaches over a variety of different tasks and content areas.
What has been learned about training to improve aptitude can be summarized as follows: