Kuder and richardson formula 20 real statistics using excel. Estadistica unefa presentacion 1 medicion observacion. A correct question scores 1 and an incorrect question scores 0. How to do statistical analysis for test test reliability. Although some recommend using the kr20 kuder richardson. The spss or any other statistical program should have the calculation of these reliability.
If you continue browsing the site, you agree to the use of cookies on this website. University of colorado denver anschutz medical campus. Can spss calculate the kuderrichardson 20 kr20 and kr21 coefficients of reliability for a scale. The aim of this study was to assess the utility of long term faculty development programs fdps in order to improve the quality of multiple choice questions mcqs items writing. The name of this formula stems from the fact that is the twentieth formula discussed in kuder and richardson s seminal paper on test reliability. In addition, kr20 computes the item difficulty proportion of right answers, the average value of item difficulty, the item variance, the itemtest pointbiserial correlation coefficients, and the average value of itemtest correlation coefficients. Performing a reliability analysis on a measurement tool in which the items are dichotomous.
The other 5% is a logistic regression test that i am working on, to replace spss solution. Melengkapi pembahasan mengenai uji instrumen yang terkait dengan validitas dan reliabilitas, pada kesempatan ini saya ingin membahas secara khusus mengenai uji reliabilitas excel. Although it can be applied to any test item responses that are dichotomously scored, it is most often used in classical psychometric analysis of psychoeducational tests and, as such. Penjelasan uji reliabilitas instrumen lengkap uji statistik. It is not the intent of this booklet to teach you spss or stata. Reliability refers to how consistent the results from the test are, or how well the test is actually measuring what you want it to measure. Extremes were compared with the mannwhitney u test. The results are listed in the upper portion of figure 1.
The kr20 is used for items that have varying difficulty. Dec 01, 2016 issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Calculating difficulty, discrimination and reliability. How to use spss kuder richardson20 kr20 reliability analysis duration. Used spss software version 20 and its statistical interpretation. Rumus kuder richardson 20 apabila pada artikel sebelumnya kita sudah membahas cara perhitungan reliabilitas instrumen dengan excel yang meliputi uji cronbach alpha, split half dan spearman brown, maka dalam artikel ini kita akan membahas cara perhitungan rumus kr 20 dengan menggunakan excel.
Using reliability, validity, and item analysis to evaluate a teacherdeveloped test in international business tracie cooper, ashley pittman, and simona womack abstract authors discuss the importance and the purpose of understanding the proper way to develop and use assessments that would be beneficial in determining achievement outcomes for. Kuderrichardson formula 20, or kr20, is a measure reliability for a test with binary variables i. Korb university of jos reliability overview reliability is defined as the consistency of results from a test. Easily share your publications and get them in front of issuus. Grading was blind and using a software program to avoid capture errors.
This index checks the internal consistency of measurements with dichotomous choices i. Kuderrichardson reliability coefficients kr20 and kr21 ibm. How to use spss kuderrichardson20 kr20 reliability. One way to accomplish this is to create a large set of questions that address the same construct and then randomly divide the questions into two sets. Dec 19, 2012 how to use spss kuderrichardson20 kr20 reliability analysis. Krl20 and kr21 only work when data are entered as 0 and 1. This video demonstrates how to perform a kuderrichardson 20 kr20 test of internal consistency in spss.
The reliability estimates are incorrect if you have missing data. Estimates internal consistency reliability given the mean m, standard deviation sd and k the number of items from a specific measure of interest. The kr20, or kuder richardson formula, measures overall test reliability. Essentially it lets you know whether the exam as a whole discriminated among students who mastered the subject matter and those who did not. Excel spreadsheet to calculate instrument reliability.
Cronbach has given a formula to find out the reliability by using standard deviations of the scores not only on odd and even items but also the total number of items is as follows. Using reliability, validity, and item analysis to evaluate. Often discussed in tandem with kr20, is kuder richardson formula 21 kr21. Th kuderrichardson formulas are used with dichotomous answers. Calculating reliability of quantitative measures dr. Correlation between forms, guttman splithalf reliability, spearmanbrown reliability equal and unequal length, and coefficient alpha for each half.
Internetbased software programs for students studying chisquare and reliability. Cronbachs alpha is a measure used to assess the reliability, or internal consistency, of a set of scale or test items. Computes the reliability coefficient of a set of dichotomous items, whereas cronbachs alpha is used for multipoint scales. Conducting a kuderrichardson 20 test kr20 in spss youtube. In parallel forms reliability you first have to create two parallel forms. In other words, the reliability of any given measurement refers to the extent to which it is a consistent measure of a concept, and cronbachs alpha is. I got the basics done in spss and learned how to manipulate the software a bit, but am now in the process of eliminating spss. The values of p in row 18 are the percentage of students who answered that question correctly e. For dichotomous response use kuder richardson 20 reliability. A statistical approach to quantitative data validation. Item analysis with spss software linkedin slideshare. How can reliability coefficient uding kr20 or kr21 be determined.
An ebook reader can be a software application for use on a computer such as microsofts free reader application, or a booksized computer that is used solely as a reading device such as nuvomedias rocket ebook. Chi square test for independence or crosstabulation 2x4 duration. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Essentials for r does not include the r programming language. Types of reliability research methods knowledge base. Please, can anyone tell me how to write the kuder richardson stata command or to reach it through menus, other than using alpha. Using and interpreting cronbachs alpha university of.
Kuder richardson formula 20 21 correlation is determined from a single administration of a test through a study of score variances 16. Item analysis technique to improve test items and instruction 2. The cronbach alpha coefficient is calculated, but if it is nominal data yes, no the statistical equivalent to the cronbach coefficient is the kr20 of kuderrichardson alfa model. Rumus kr 20 dan tutorial cara hitung dengan excel uji. Pada pembahasan sebelumnya, kita telah mengetahui bagaimana cara menghitung validitas menggunakan software excel. When jamovi is calculating cronbachs alpha for internal consistency reliability does it switch to using the kr20 formula kuder richardson 20 when it detects that the measures are dichotomous. This video demonstrates how to perform a kuder richardson 20 kr20 test of internal consistency in spss. Ranges from 01 the higher the better greater than 0. Ibm spss statistics essentials for r includes the ibm spss statistics integration plugin for r and a set of extension commands that are implemented in r that provide capabilities beyond what is available with builtin spss statistics procedures.
In the examples i use spss1 and stata2 command files. The most useful measure is generally the kuderrichardson formula 20 kr20. An ebook reader can be a software application for use on a computer such as microsofts free reader application, or a booksized computer this is used solely as a reading device such as nuvomedias rocket ebook. Kuder richardson formula 20, or kr20, is a measure reliability for a test with binary variables i. Lalu pertanyaan selanjutnya adalah, apakah excel bisa juga digunakan untuk menghitung. A survey of software test estimation techniques kamala ramasubramani jayakumar, alain abran doi. My understanding is that spss does this because cronbachs alpha isnt appropriate for dichotomous variables and just wondering if jamovi did. A learning continuum for university and school partnership cusp. Universidad peruana cayetano heredia validez y confiabilidad mg. Thermuohp biostatistics resource channel 100,924 views. Faculty development programs improve the quality of.
Oct 25, 2015 this video demonstrates how to perform a kuder richardson 20 kr20 test of internal consistency in spss. Kr21 is a simplified version of kr20, which can be used when the difficulty of all items on the test are known to be equal. In psychometrics, the kuder richardson formula 20 kr20, first published in 1937, is a measure of internal consistency reliability for measures with dichotomous choices. Cronbachs alpha continuous and dichotomous data in spss. If you have more than 1 factor that is substantive, then you have a multidimensional construct. You administer both instruments to the same sample of people. A statistical approach to quantitative data validation focused on the assessment of students perceptions about biotechnology.
A pilot test was applied to two groups of student interns neophytes g1 and intervened g2 and consistency was established with the kuderrichardson formula. Effect of collaborative testing on learning and retention of course content in nursing students. I have created an excel spreadsheet to automatically calculate splithalf reliability with spearmanbrown adjustment, kr20, kr21, and cronbachs alpha. Effect of collaborative testing on learning and retention.
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