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De psychometrische kwaliteiten van het STIP instrument : differentiatie in het basisonderwijs

Nus, Marlou van (2015) De psychometrische kwaliteiten van het STIP instrument : differentiatie in het basisonderwijs.

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Abstract:Every student is different in terms of their ability, learning and achievement. Nowadays it is considered a key skill for teachers to adapt their teaching to these differences, so that all students have the best possible chance of learning. However, most teachers find it difficult to adapt their lessons in such a way that they meet the diverse learning needs of their students. In order to find out to what degree teachers of primary schools create a differentiated instruction the STIP instrument has been developed. The STIP instrument is an observation instrument that measures the extent to which teachers are using differentiated instruction. The aim of this study is to measure the psychometric properties –the reliability and validity- of the STIP instrument. At first, the STIP instrument has been used in twenty different classes at six different schools. In order to measure the interrater reliability, the instrument has been used ten times by a second rater. The external validity has been tested by comparing the STIP instrument with items of a similar instrument (ICALT). A third rater has used the ICALT ten times. Lastly, the content validity has been tested by three experts in the field of education. The results show 1) a high interrater reliability (an overall score of k = .763), 2) a low external validity between the ICALT and the STIP instrument (Rs = -.346) and 3) a high content validity between the experts based on two dimensions: the importance of the item measuring differentiation (ICC = .517 and M = 4.34) and the accuracy of the language used to describe differentiation (ICC = .167 and M = 5.79). Based on the results there are a few recommendations to improve the validity and reliability of the STIP instrument. For example: a couple of items should be reconsidered as they did not seem relevant in relation to the construct ‘differentiation’, also a few items should be described more precise in order to define the construct ‘differentiation’ better. In conclusion, by measuring the implementation of the STIP instrument a better understanding of how and why the STIP instrument works and to what extent it can be improved has been gained. Keywords: differentiation, reliability, validation, STIP instrument, ICALT, observation-instrument.
Item Type:Essay (Master)
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
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