Self Determination Inventory (SDI)

The SDI is a set of measures to assess a student's self determination. It includes questions about choice making, goal setting, and decision making. The Inventory includes a self-report measure for people aged 13-22 with or without disabilities, as well as a parent or teacher report for an outside perspective. These two assessments can be combined for a full view of a student's self-determination. The assessment uses a continuous scale between "Agree" and "Disagree" on their online platform.  For a non-visual option, those using a screen reader can use higher numbers to show higher agreement. There are 17 questions in the measure. 


Self Management,
Responsible Decision Making

Goal Setting

8th Grade,
9th Grade,
10th Grade,
11th Grade,
12th Grade,
Post secondary
Other Language/s
American Sign Language

Administration Information

17 items

Access and Use


Kansas University Center of Developmental Disabilities


Open Access
Use in Research

Shogren, K. A., Shaw, L. A., Raley, S. K., & Wehmeyer, M. L. (2018). Exploring the effect of disability, race-ethnicity, and socioeconomic status on scores on the Self-Determination Inventory: Student report. Exceptional Children, 85(1), 10-27.

Shogren, K. A., Shaw, L. A., Raley, S. K., & Wehmeyer, M. L. (2018). The impact of personal characteristics on scores on the Self‐Determination Inventory: Student Report in adolescents with and without disabilities. Psychology in the Schools, 55(9), 1013-1026.

Shogren, K. A., Anderson, M. H., Raley, S. K., & Hagiwara, M. (2020). Exploring the relationship between student and teacher/proxy-respondent scores on the Self-Determination Inventory. Exceptionality, 29(1), 1-14.


Computer scoring
Psychometric References

Mumbardó-Adam, C., Guàrdia-Olmos, J., Giné, C., Shogren, K. A., & Vicente Sánchez, E. (2018). Psychometric properties of the Spanish version of the Self-Determination Inventory Student Self-Report: A structural equation modeling approach. American Journal on Intellectual and Developmental Disabilities, 123(6), 545-557.

Shogren, K. A., Wehmeyer, M. L., Little, T. D., Forber-Pratt, A. J., Palmer, S. B., & Seo, H. (2017). Preliminary validity and reliability of scores on the Self-Determination Inventory: Student Report version. Career Development and Transition for Exceptional Individuals, 40(2), 92-103.

Shogren, K. A., Little, T. D., Grandfield, E., Raley, S., Wehmeyer, M. L., Lang, K. M., & Shaw, L. A. (2020). The Self-Determination Inventory–Student Report: Confirming the factor structure of a new measure. Assessment for Effective Intervention, 45(2), 110-120.

Shogren, K. A., Shaw, L. A., & Mumbardó-Adam, C. (2019). The Assessment of Self-Determination in Spanish and American Adolescents: The Self-Determination Inventory: Student Report. Intellectual and Developmental Disabilities, 57(4), 274-288.

National Comparison
Item Type

Psychometric Considerations

Psychometrics is the science of psychological assessment. A primary goal of EdInstruments is to provide information on crucial psychometric topics including Validity and Reliability – essential concepts of evaluation, which indicate how well an instrument measures a construct - as well as additional properties that are worthy of consideration when selecting an instrument of measurement.

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