O*NET® 
                           Interest Profiler Manual 
                                              
                                         Edited by:  
                                              
                                       James Rounds 
                            University of Illinois at Urbana-Champaign 
                                              
                                         Kevin Hoff 
                                    University of Houston 
                                              
                                         Phil Lewis 
                             National Center for O*NET Development 
                                              
                                              
            
            
                                       Prepared for 
                                              
                                  U.S. Department of Labor 
                            Employment and Training Administration 
                                Office of Workforce Investment 
                   Division of National Programs, Tools, & Technical Assistance 
                                      Washington, DC 
            
                                              
                                       Submitted by 
                                              
                          The National Center for O*NET Development 
                                        March, 2021 
            
                                                                                                                
                                                     
                                                        www.onetcenter.org 
                                                        
           National Center for O*NET Development, 313 Chapanoke Road, Suite 130 
           Raleigh, NC 27603 
            
                  
                                                       TABLE OF CONTENTS 
                  
                 EXECUTIVE SUMMARY .................................................................................................3 
                 LIST OF CONTRIBUTORS ...............................................................................................4 
                 CHAPTER 1: Interest Assessment and the O*NET Interest Profiler ..................................5 
                 CHAPTER 2: Interest Profiler Forms, Versions, and Linkage to Occupations.................14 
                 CHAPTER 3: Test Administration, Scoring, and Reporting for the Interest Profiler .......30 
                 CHAPTER 4: Development of Items and Interest Profiler Forms ....................................40 
                 CHAPTER 5: Reliability Evidence for the Interest Profiler ..............................................61 
                 CHAPTER 6: Validity Evidence for the Interest Profiler .................................................77 
                 CHAPTER 7: Interest Profiler Linkage to O*NET Occupations ....................................121 
                 CHAPTER 8: International Forms and Applications of the Interest Profiler ..................134 
                                                  
                  
                  
                 National Center for O*NET Development                                                          2         
                      
                  
                                                 [O*NET Interest Profiler Manual] 
                                                                      
                                                         Executive Summary 
                          
                 The O*NET Interest Profiler (IP) is a vocational interest inventory designed for use in 
                 educational planning, career exploration, and career guidance (Lewis & Rivkin, 1999). The 
                 Interest Profiler was introduced in 1999 as one of the U.S. Department of Labor’s (DOL) 
                 O*NET Career Exploration Tools. John Holland’s (1997) RIASEC theoretical model 
                 (Realistic-Investigative-Artistic-Social-Enterprising-Conventional) is the basis of the Interest 
                 Profiler scales. Over the years, millions of people have taken the Interest Profiler. Its current 
                 web-based version included in the My Next Move and Mi Proximo Paso websites, versions 
                 incorporated by private and public application developers, and available paper-and-pencil 
                 version continue to make it a widely disseminated and extensively used career exploration tool. 
                 Use and integration of the Interest Profiler is offered free-of-charge via the O*NET Career 
                 Exploration Tools Content License (https://www.onetcenter.org/license_tools.html).   
                  
                 Since its introduction, the Interest Profiler has undergone several revisions, producing three 
                 forms of the Interest Profiler: IP Long-Form, IP Short-Form, and Mini-IP. During these revisions 
                 and selection of items and formats, O*NET has published a series of reports that documented the 
                 construction and validation of the Interest Profiler. This documentation published on the O*NET 
                 website (https://www.onetcenter.org/research.html?c=IP_CIP) has met the spirit of Standards for 
                 Educational and Psychological Testing (2014), providing information on scoring, reliability and 
                 validity of scores, and participants reactions to the experience of completing and receiving score 
                 interpretations. 
                  
                 The present Interest Profiler Technical Manual integrates prior scale developmental reports and 
                 summarizes over 20 years of research on the Interest Profiler. The manual is written as chapters, 
                 authored by students and graduates of Industrial and Organizational PhD programs at the 
                 University of Illinois-Urbana-Champaign and the University of Houston. Topics covered include 
                 an overview of the Interest Profiler (chapter 1), forms and versions (chapter 2), scoring and 
                 reporting (chapter 3), item development (chapter 4), reliability (chapter 5), validity (chapter 6), 
                 linkage to occupations (chapter 7), and international applications (chapter 8).   
                  
                  
                                                  
                  
                  
                 National Center for O*NET Development                                                          3         
                      
                  
                                                         List of Contributors 
                                                                      
                 Authors listed below are in alphabetical order: 
                  
                 Chu Chu 
                 Department of Psychology 
                 University of Illinois at Urbana-Champaign 
                  
                 Kenneth E. Granillo-Velasquez 
                 Department of Psychology 
                 University of Houston 
                  
                 Alexis Hanna 
                 Department of Management 
                 University of Nevada, Reno 
                  
                 Kevin A. Hoff 
                 Department of Psychology 
                 University of Houston 
                  
                 Phil M. Lewis 
                 National Center for O*NET Development 
                  
                 Hannah S. Nelson 
                 Department of Psychology 
                 University of Houston 
                  
                 James Rounds 
                 Department of Psychology and Educational Psychology   
                 University of Illinois at Urbana-Champaign 
                  
                 Tianjun Sun 
                 Department of Psychology 
                 University of Illinois at Urbana-Champaign 
                  
                 Colin J. M. Wee 
                 Department of Psychology 
                 University of Illinois at Urbana-Champaign 
                  
                 Bo Zhang 
                 Department of Psychological & Brain Sciences 
                 Texas A&M University 
                  
                  
                  
                 National Center for O*NET Development                                                          4