Development and validation of instrument for assessing practical skills in fault diagnoses and repairs of radio and television systems in Nigerian technical colleges

摘要

This study developed and validated a radio and television skill assessment scale (RTSAS) that will improve the assessment of students' performance in diagnoses and repairs of faults in radio and television systems. The study answered one research question and tested two hypotheses. The RTSAS comprising of practical skills based on National Business and Technical Examinations Board (NABTEB) curriculum and related literature were developed and validated by seven experts. Radio and television teachers from technical colleges in the South-South zone of Nigeria were the sample used for item validation of the RTSAS which was further tried out on radio and television students. Data collected were analyzed using statistical mean, Cronbach's Alpha and One Way Analysis of Variance (ANOVA). The result of the study showed that six clusters and 76 practical skills were found appropriate for the RTSAS. Also, the instrument was found to possess a high reliability of 0.95. Based on this result, it was recommended amongst others that radio and television teachers in technical colleges and other similar institutions in Nigeria should be made to be aware and learn to use the RTSAS for assessing performance in radio and television fault diagnoses and repairs.