Abstract : The purpose of this article is to guide researchers to understand the basic concept of ICC and example ICC analysis will provide for easier understanding of the ways the process analysis in SPSS software. Selection of the correct ICC reliability should include software information, “model” and “type,” selections. For model selection focusing on one-way random, two-way random, and two-way mixed model. Besides that, type selection only focusing on “absolute agreement” and “consistency”. Interpretation of the result from ICC must follow the guideline because currently a lack of a standard for reporting ICC in the clinical research community. It is important for researchers to report detailed information about their ICC estimates by inserting software information, “Model”, “Type,” selections, and 95% confidence intervals.