Validity and reliability is very important research instrument as a part of study. This section is useful to realize the reliability and confidence in the results of research. A scale or measuring instrument in a research can be said to have high validity.  If the instrument is used to examine own reliability in carrying measuring function, or can provide measurement results in accordance with objective measurement. The research objective was tested for the validity and reliability of a research instrument in the influence of Flipped Classroom Model Learning (FCL) towards independent learning for Bachelor of Nursing students. Total population sampling was 30 students from Bachelor science of nursing students, who were followed the Model FCL on their subjects in Mental Health Nursing.  Guttmann scale questionnaire form was used, and numbered 21 statements with a choice of 'yes', 'no' and 'free'. Techniques of collecting data through a cross sectional approach, the results of computerized data is processed and analyzed by using Pearson Product Moment Correlation. Test results on the overall validity and reliability of questionnaires independent learning and critical thinking abilities of items valued and the results with r> 0.33 and has been reliable with Alpha r values > 0.666 by Cronbach's Alpha .931. It concluded that the instrument was valid and thus fulfill reliable qualify as a measuring tool fit to use in research.

Keywords: validity, reliability, research instruments, Flipped Class, independent learning.