The knowledge that the learners have in the subjects they have learnt is often considered as an area that reflects his cognitive development
The competency attained by the learners in a subject after it is being taught indicates how much new knowledge he has gained in relation to that subject
This assists the teacher to measure the achievement of the learner in an effective manner. The learner's performance in each of these areas measured separately, makes it possible to get a clear picture of his total cognitive development in the subject. Generally, achievement tests are used in measuring the cognitive knowledge of the learner in relation to a subject
Such learning disabilities found among the learners can be measured by observing them in the classroom during the learning process and also by administering diagnostictests
The answer prepared by the learner shows the limits of the answer more clearly, questions are framed with a statement as a problem and several questions based on it
Diagnostic tests are conducted at the start of a learning experience, to help the teacher (and the student) how much they know and don't know about an upcoming topic