The Kolb Learning Style Inventory version 3.1 (KLSI 3.1) revised in 2005 and the KLSI 3.2 revised in 2013 are updated revisions of the paper version of the original Learning Style Inventory developed by David A. Kolb. Like their predecessors, the KLSI 3.1 & 3.2 are based on experiential learning theory (Kolb 1984) and are designed to help individuals identify the way they learn from experience. The KLSI 3.1 & 3.2 norms are based on a larger, more diverse and representative sample of 6977 LSI users. The format, items, scoring and interpretative booklet remain identical with KLSI 3. The technical specifications are designed to adhere to the standards for educational and psychological testing developed by the American Educational Research Association, the American Psychological Association, and the National Council on Measurement in Education (1999). The first section of the technical specifications describes the conceptual foundations of the LSI in the theory of experiential learning (ELT). Section two provides a description of the inventory that includes its purpose, history, and format. Section three describes the characteristics of the KLSI 3.1& 3.2 normative sample. Section 4 includes internal reliability and test-retest reliability studies of the inventory. Section 5 provides information about research on the internal and external validity for the instrument. Internal validity studies of the structure of the KLSI 3.1 & 3.2 using correlation and factor analysis are reported. External validity includes research on demographics, educational specialization, and concurrent validity with other experiential learning assessment instruments, aptitude test performance, academic performance, experiential learning in teams, and educational applications.