Bilgisayar Sunumlarına Yönelik Görüşler Ölçeği (BSYGÖ): Geçerlik ve Güvenirlik Çalışması

Cüneyt ÇAPRAZ, Selami YEŞİLYURT
2020 Kastamonu Eğitim Dergisi  
Öz Bu çalışmanın amacı, bilgisayar sunumlarına yönelik görüşlerin tespit edilmesini sağlayacak geçerli ve güvenilir bir ölçeğin geliştirilmesidir. Bu amaçla öncelikle madde havuzu (82 madde) oluşturulmuştur. Sonrasında konu uzmanlarının görüşlerinden yola çıkarak yüzey ve kapsam geçerlik analizleri yapılmıştır. Analizler sonrası kalan 58 madde Likert tipinde 5'li değerlendirmeye sahip deneme formu şeklinde hazırlanarak toplam 366 öğretmen adayına uygulanmıştır. Uygulamanın sonunda elde edilen
more » ... rilerin analizinde SPSS 20.0 istatistik programından yararlanılmıştır. Ölçekteki her bir maddenin ölçme gücü madde-toplam korelasyonu bakılarak yapılmış, düşük güvenirliğe sahip 24 madde ölçekten çıkarılmıştır. Ölçeğin yapı geçerliğini belirlemek amacıyla yapılan açımlayıcı faktör analizi sonucunda toplam varyansın %41.324'ini açıklayan ve anlamlı olarak kabul edilen 3 faktörlü, 29 maddeden oluşan bir yapı elde edilmiştir. Ölçeğin genelinden elde edilen Cronbach Alpha iç tutarlık katsayısı 0,897 olarak hesaplanmıştır. Bu haliyle ölçeğin yüksek derecede güvenilir olduğu söylenebilir. Abstract The aim of this study is to develop a reliable and valid scale which is going to allow one to detect the views about computer presentations. For this purpose, firstly an item pool which includes 82 items is composed. After then, content validity and face validity were done according to the expert views. After the analyses, 58 items left. Those 58 items are prepared as a 5 point Likert Type scale and applied to 366 teacher candidates. The data obtained from the application is analyzed with SPSS 20.0 statistics software. The discrimination power of each item in the scale is detected by looking at the item total correlation. And the 24 items which have low reliability values are excluded from the scale. Exploratory factor analysis is performed to detect validity of the structure. As a result of the analysis a structure with 3 factors and 29 items is obtained. The structure explains 41.324% of total variance and is considered as valid. Cronbach Alpha internal consistency coefficient for the whole scale is estimated as 0.897. With this status of the scale, one can say that it is a highly reliable scale Extended Abstract Aim: This study aims to develop a valid and reliable "Scale for the Views about Computer Presentations" which will ensure the detection of views about the computer presentations that are used in almost all schooling levels. Methodology: The study group is consisting of the experts from Erzurum Ataturk University Kazım Karabekir Education Faculty who are determined by convenience sampling and 2015-2016 academic year last class students of different departments. During the construction of the item pool, the views of 5 male subject matter expert instructors (2 Professor Doctors, 2 Associate Professor Doctors and 1 Assistant Professor Doctor) who are determined by convenience sampling and 15 students are taken into consideration. Factor analysis is one of the statistical techniques that describes multiple correlated variables of the scale as lesser number of variables that are independent from each other. 250 female (68.33%) and 166 male (31.69%) students (total 366) joined into our factor analysis study. The students are the last grade students of different departments such as Composition of the Item Pool: In this stage, possible views about computer presentations are detected via semistructured interviews that are conducted by 5 instructors and 15 students who are experienced in preparing computer presentations. Lastly sample scale questionnaire with 82 items is formed. Application of Face Validity: In this stage, face validity is applied to the 82 items of sample scale questionnaire by instructors (7 people) who are subject and language experts. As the result of face validity application, 16 items are decided to be excluded from questionnaire and 66 items are left. Content Validity: The views of 26 experts are taken into consideration in order to detect the content validity of 66 items that are left after face validity application. According to Ayre and Scally, for the 26 experts participated in the study of developing SVCP, CVRcritical value is found as 0.385 in α=0,05 significance level. As a result, 6 items ( Table 3 .0) that have CVRcritical values lower than 0.385 are also excluded from the scale and finally 58 items are left in the scale. Developing the Sample Form of the Scale Development stages of the scale are as follows: First Stage: Draft statements that are obtained after face and content validity analysis are reassessed by the experts who were consulted for the face validity. As a result a sample questionnaire with 58 items is formed. Second Stage: The items in the sample questionnaire are in the form of 5-point Likert type response scale. Likert type items in the scale are classified as Definitely Always (5), Mostly (4), Sometimes (3), Barely (2) and Never (1). 20 of the Likert type items are in the form of negative statements. Therefore, for the analysis points of the items with negative statements are reversed as Definitely Always (1) and Never (5). Third Stage: In order to detect to what extent the items in the scale evaluate similar behaviors gathered data from 366 students. In the light of the data from, correlations between scores on each item and the total scale scores (item-total score correlation) are estimated. Fourth Stage: Lastly in order to reveal the construct validity of the scale, the factor analysis is done. Fifth Stage: Cronbach Alpha coefficient is calculated to estimate the reliability of the scale.
doi:10.24106/kefdergi.3514 fatcat:5ig42vs2ljf53i3zeoohcr5ghe