eng Science and Education Publishing American Journal of Educational Research 2327-6150 2017-06-22 5 6 645 649 10.12691/education-5-6-9 EDUCATION2017569 article The Effect Number of Replication and the Number of Option Scale toward the Reliability Coefficient of Maximal in the Rubric Assessment of Vocational Learning Outcome Wardani Rahayu wardani.rahayu@unj.ac.id 1 Zainal Abidin 1 Universitas Negeri Jakarta, Jl. Rawamangun Muka, Rawamangun, Jakarta This study aims to determine the effect of number of replication and the number of option scale toward the maximal reliability coefficient in the assessment instrument rubric. This research used experimental method. The population is all students of state vocational high school of food processing technology of Cianjur in the 2014/2015 academic year. This research used t-test analysis. The result of the research shows that maximal reliability coefficient is higher with more and more option scale on instrument of rubric. Number of data replication has an effect on maximal reliability coefficient. The maximal reliability coefficient gets higher with more and more data replication on instrument of. http://pubs.sciepub.com/education/5/6/9/education-5-6-9.pdf number of replication number of option scale rubric maximal reliability