Thomas-Kilmann Instrument: One Assessment per Person



Take the Thomas-Kilmann Instrument (TKI assessment) from the person who co-created it: Dr. Ralph H. Kilmann. Ralph's e-learning platform offers all his research, online courses, and TKI certifications.

Kilmann Diagnostics is dedicated to resolving conflict throughout the world, so we naturally include the renowned Thomas-Kilmann Instrument (TKI) in every one of our recorded online courses. Why? Because no two individuals have exactly the same needs and concerns, conflict is a natural part of our interactions with others—whether in our personal life or in our organizational life. The TKI is an online assessment that will take you 15 to 20 minutes to complete and download your personalized results—which will help you discover the most appropriate uses for each conflict-handling mode in different situations. Be prepared to experience many eureka (aha) moments!

The TKI has been the leader in conflict resolution assessment for more than forty years. To date, more than 8,000,000 copies of the TKI have been published since 1974. 

See this Dedicated TKI Page, which provides a great variety of online TKI resources. Be sure to watch our seven Videos for the Thomas-Kilmann Instrument and read our many Full-Length TKI Articles. To learn where to take the TKI assessment in Spanish, Portuguese, French, German, Danish, Dutch, Swedish, Italian, Russian, Chinese, or Japanese, click here.


  • The TKI AssessmentDr. Ralph Kilmann is the co-author of the TKI: If you have any questions about how to administer the assessment or interpret your results, you won't be able to find another person who has more TKI knowledge and experience.
  • The TKI is a self-report assessment that allows you to discover whether you might be overusing (a high score) or underusing (a low score) one or more of these five conflict-handling modes: competing, collaborating, compromising, avoiding, and accommodating. 
  • To determine which of your TKI mode scores are high or low, your results are compared to a.U.S. research sample of 8,000 men and women who were drawn from a pool of 59,000 TKI respondents in order to mirror the demographic distribution of the U.S. population. A subsequent cross-cultural research sample of 6,000 men and women from 16 different countries revealed only minor variations from the U.S. norms. These rather surprising results demonstrate that the TKI is measuring an aspect of conflict-handling behavior that is fairly consistent across different countries and cultures.
  • Sample TKI ReportOne reason that TKI results have such cross-cultural consistency is because the assessment was purposely designed to minimize the "social desirability response bias" (which is the natural tendency for people in all societies to respond to test items in order to look good to themselves or to others). Consequently, TKI results provide an accurate picture—across the globe—of how people actually behave in conflict situations. 
  • As soon as you complete your assessment, which only takes about 15 minutes, you can download your personalized TKI Report.

Your TKI Profile



The price for one online TKI is $45. At the bottom of this page, you can add this online assessment to your shopping cart. To purchase the PAPER version of the TKI, which requires you to score, graph, and interpret your own results, you must go to the publisher's website: The Myers-Briggs Company.

Once you complete your purchase, you have 90 days to take the TKI assessment and download your personalized TKI report.



For 1 to 49 persons, each TKI is $45.00.
For 50 to 99 persons, each TKI is $42.50. 
For 100 to 499 persons, each TKI is $40.00. 
For 500 to 999 persons, each TKI is $37.50. 
For 1000 or more, each TKI is $35.00.

NOTE: To purchase the PAPER version of the TKI, which requires participants to score, graph, and interpret their own results, you must go to the publisher's website: The Myers-Briggs Company.

At the bottom of this page, you can enter the desired quantity of online TKIs to your shopping cart. If you enter 50 or more TKIs, the total charge will be based on the relevant quantity discount. As soon as a TKI is assigned to a person on your spreadsheet (see below), he or she has 90 days to take the assessment.

After you complete your checkout, download The Spreadsheet for Creating Group Accounts and follow the instructions. If you are buying the TKI for one other person, fill out the spreadsheet for just that one person. From the date of purchase, a TKI assessment can be assigned to one or more persons (via sending us a completed spreadsheet) for a period of one year.

If you'll be conducting an educational program for several persons (or someone else) and you want to make use of their TKI results before that meeting, ask them to send you a copy of their personalized report as soon as they have downloaded it.

Extra Services for Group Accounts: When all the participants in your group have completed their TKI assessments, if you request it, we can send you a zip file that contains their TKI Reports. However, if you wish to have these zip files sent to you more frequently, we charge extra for this special service. In addition, we are willing to provide you with an update on the status of your account just prior to a workshop or other educational program (regarding who has and who hasn't completed the TKI assessment). But if you wish to receive more frequent updates, we also charge extra for such a time-consuming service. Moreover, if you need help in correctly completing additional KD_Spreadsheets for your group account (let alone completing your initial KD_Spreadsheet), we are willing to provide that service, but that extra work is not covered in the group purchase price of TKI assessments. Please Contact Us for these and other extra services, which you can then purchase on our Special Payments Page.



As described in our recorded online course, GROUP Training in Conflict Management, there are several benefits for taking TWO separate TKI assessments, each with modified instructions: (1) how you manage differences INSIDE your group and (2) how you manage differences OUTSIDE your group (across all other settings in your life).

By taking these two modified TKI assessments, you will learn how the leader, the other members, the culture, and the reward system might be unduly influencing how conflict is being managed in your group—which has not led to satisfactory outcomes for you, the group as a whole, and other key stakeholders. But once you (and your group members) receive the two TKI Reports from those two modified TKI assessments, members will be able to discuss which conflict modes are most needed for success INSIDE their group, while they also realize which conflict modes they're already using effectively OUTSIDE their group. It will then be much easier for members to significantly improve their group's conflict-handling behavior, which includes improving their surrounding systems as they expand their use of all five modes INSIDE their group.

To purchase two TKI assessments per person with modified instructions, click on this link: Thomas-Kilmann Instrument: Two Assessments per Person.


BASIC Training in Conflict Management


During our 80-minute BASIC Training in Conflict Management, not only will Dr. Kilmann help you interpret your TKI results, but you'll also learn how to interpret other people's results. Taking this course is the best way to make sure you are accurately interpreting TKI results—and using this assessment to its full potential. Click on the image to the right to learn how you can gain the most value-added knowledge from an individual's TKI assessment.




Before you can purchase the TKI assessment for yourself, you must first create a username account—or log in to your existing account. Once you have purchased one TKI for yourself, remain logged into your account and click on My TKI on your username panel at the top left of our website. A new page will open that will provide the instructions and a link for taking the TKI. 

If you have purchased the TKI for one or more other participants, please send us a completed KD_Spreadsheet, so we can arrange for your client(s) to take the TKI through their own private account on our publisher's website.

Review Our Policies: Copyrights, Purchasing, Privacy, Refunds, Renewals, and Upgrades


The Online TKI Assessment Before Any Quantity Discount:

Price: $45.00