Sept 14 - purposes of measurement, testing, aand evaluation.doc

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Physical Education and Sport
John Dunn

Sept 14 – Purposes of measurement, testing, and evaluation • The true score is only known by god • Emotions biased judgement • If evaluations are biased, the evaluations are an inaccurate assessment of the instructor • Bias is a non objective assessment of the teaching and is a source of measurement error • Example to eliminate bias, instructor marks exams as anonymous to avoid having feelings influence marking There are 2 types of measurement error 1.) Systematic measurement error – error that allows a person’s bias towards a person to systematically influence the way they evaluate or mark them. The subject will get a higher score due to the instructor looking to award marks anywhere possible. If someone makes a mistake marking the scantron or there’s an equipment malfunction, there is systematic measurement error. Systematic means that it applies to all people in a specific context 2.) Random measurement error – is random and would not exist if there was another evaluation. Example of this is if a professor marks one question wrong when it should have been right. Random measurement error has no way of eliminating it except for retesting or re-checking. Peer assessment – where a peer of the prof will come in and watch him teach a class while observing in the back of a classroom. If peer assessment and the student evalutions say the teacher is good, and the students randomly say the teacher is good, we have a multi-method assessment Multi method assessment says there are more than one method used to gather data. We should note that all 3 of these tests all converge on the same result.. good. These 3 sources should all have the same inferences Convergent validity is when more than one source converge on the same conclusion Note measurement error, systematic and random eroor, convergent validity, and the idea of making inferences Placement • We do tests for placement so we can place them in a stream where there are people similar to you • We use a formative evaluation and then place them in a class where they can have the best experience Diagnosis • We are looking for the strength and weaknesses of a participant to deal with them • Ex. Clinical psychologists will submit subjects to a battery of tests to see if there are any psychological problems present in the person Prediction • The highest level of scientific research • When we test people, we are hopefully able to predict performance in the future • Based on performance on exams, we can predict how successfu
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