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MAGNET  > Platforms  > Assessment  > Assessment Search  > Muscle Dysmorphic Disorder Inventory

Muscle Dysmorphic Disorder Inventory (MDDI)

Description

The MDDI is a 13-item questionnaire which assesses symptoms of muscle dysmorphia.The MDDI is a 13-item questionnaire which assesses symptoms of muscle dysmorphia.

Test Features

Administration details

Administration type: Self-report Timeframe:

Participants are asked to indicate how they ‘typically think, feel, or behave’.

 Approx time: 05-15 minutes

Accessing the assessment and manual information

Access information:
  • Hildebrandt, T., Langenbucher, J., & Schlundt, D. G. (2004). Muscularity concerns among men: development of attitudinal and perceptual measures. Body Image, 1(2), 169–181. https://doi.org/10.1016/j.bodyim.2004.01.001

License details

Free to Use?

Yes

Reliability and Validity

Note: Listed publications are for the English version of the assessment only
  • Compte, E. J., Cattle, C. J., Lavender, J. M., Murray, S. B., Brown, T. A., Capriotti, M. R., ... & Nagata, J. M. (2021). Psychometric evaluation of the Muscle Dysmorphic Disorder Inventory (MDDI) among cisgender gay men and cisgender lesbian women. Body Image, 38, 241-250. https://doi.org/10.1016/j.bodyim.2021.04.008
  • Compte, E. J., Cattle, C. J., Lavender, J. M., Brown, T. A., Murray, S. B., Capriotti, M. R., ... & Nagata, J. M. (2022). Psychometric evaluation of the Muscle Dysmorphic Disorder Inventory (MDDI) among gender-expansive people. Journal of Eating Disorders, 10(1), 1-11. https://doi.org/10.1186/s40337-022-00618-6

Norm information

Healthy control/general population norms:
  • Australia - men: Hughes, E. K., Dean, C., & Allen, J. S. (2016). Measures of eating disorder symptoms, drive for muscularity, and muscle dysmorphia: Norms and typologies of Australian men. Australian Journal of Psychology, 68(4), 270-280. https://doi.org/10.1111/ajpy.12105
  • USA - cisgender sexual minority men and women: Nagata, J. M., Compte, E. J., Cattle, C. J., Lavender, J. M., Brown, T. A., Murray, S. B., ... & Lunn, M. R. (2021). Community norms of the Muscle Dysmorphic Disorder Inventory (MDDI) among cisgender sexual minority men and women. BMC Psychiatry, 21, 297. https://doi.org/10.1186/s12888-021-03302-2
  • USA - gender minority populations: Nagata, J. M., Compte, E. J., McGuire, F. H., Lavender, J. M., Brown, T. A., Murray, S. B., ... & Lunn, M. R. (2021). Community norms of the Muscle Dysmorphic Disorder Inventory (MDDI) among gender minority populations. Journal of Eating Disorders, 9, 87. https://doi.org/10.1186/s40337-021-00442-4

Further information:

The MDDI is also available in Italian, Spanish, Turkish, and Brazilian Portuguese.