Friday, May 18, 2012

Validity and Reliablity


           Teaching student’s knowledge is not enough for the students. The teacher should assess these skills to make sure that the students mastered the knowledge and skills.  There are various types of assessment tools but whatever the type was, its aim is to improve students understanding. The most common method for assessment is testing. These tests should be well prepared so that they assess students in a good way. Regardless of the type of the assessment used, all tests should possess two characteristics: validity and reliability. When the assessment results are adequate and appropriate that means the test is valid. A valid test means that it matches the targets and objectives which had been discussed in the class. Reliability is another characteristic of the assessment result in which it refers to the consistency of the scores.  For example, when we repeat the exam the students should take approximately the same score as the first time. 

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