However, the scale is not valid because it does not display the actual weight of the item. For example, if a weight measuring scale is wrong by 4kg (it deducts 4 kg of the actual weight), it can be specified as reliable, because the scale displays the same weight every time we measure a specific item. Reliability alone is not enough, measures need to be reliable, as well as, valid. In simple terms, validity refers to how well an instrument as measures what it is intended to measure.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.Research validity in surveys relates to the extent at which the survey measures right elements that need to be measured. & amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp lt div class="statcounter"& amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp lt a title="Web Analytics Made Easy - StatCounter" href="" target="_blank"& amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp lt img class="statcounter" src="//c./1167a82bdb4/0/" alt="Web Analytics Made Easy - StatCounter"& amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp lt /div& amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp amp gt View IJERE Stats International Journal of Evaluation and Research in Education (IJERE) Finally, out of 71 items, 68 items are retained.Ĭopyright (c) 2016 International Journal of Evaluation and Research in Education (IJERE) The finding of this pilot study shows that the instrument is valid and reliable. The reliability of the instrument is measured using internal consistence reliability, which is measured by alpha coefficient reliability or Cronbach Alpha. The content validity is assessed by the experts and the construct validity is measured by Exploratory Factor Analysis (EFA). The instrument in the form of questionnaire is distributed to a sample of 120 primary and secondary school teachers. The instrument is developed based on a conceptual framework developed by Daniel Stufflebeam, that is the CIPP (context, input, process and product) Evaluation Model.
The aim of this study is to develop and assess the validity and reliability of an instrument to measure the perception of teachers towards the SBA implementation in schools. A valid, reliable and practical instrument is needed to evaluate the implementation of the school-based assessment (SBA) system.