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Islamic Doctrinal Orthodoxy (IDO)


Assessment name:  Islamic Doctrinal Orthodoxy (IDO)

Scale overview: The Islamic Doctrinal Orthodoxy (IDO) scale is an eight-item self-report measure of Islamic beliefs (Ji & Ibrahim, 2007).

Authors: Ji & Ibrahim

Response Type: Participants rate the items on a 9-point scale of agreement.

Scale items: The authors (Ji & Ibrahim, 2007b) reported two factors: Cognitive-Abstract Orthodoxy (CAO) and Ritualistic-Judgmental Orthodoxy (RJO).

The items assess agreement with Islamic teachings on Allah, Mohammed the Prophet, the Koran, the five pillars of Islam, and the last judgment.


CAO: “I believe there is no other God but Allah”

RJO: “Salah is crucial to the life of a Muslim”

Psychometric properties

Overall alpha was high at .90 (Ji & Ibrahim, 2007a). The alpha levels for the subscales were also high (Ji & Ibrahim, 2007b) CAO = .93 and RJO = .83.

The correlation of the IDO with Intrinsic religiosity was low but reliable (.17). There were no significant relationships between the IDO and measures of Extrinsic religiosity or Quest (Ji & Ibrahim, 2007a).

Availability: The items can be found in Ji and Ibrahim (2007a).

Resource Links:

  A – Z Test Index

  A - Z Index of Spiritual & Religious Assessment 

Related resource

Assessing Spirituality & Religiosity A Handbook

Beliefs, Practices, Values, & Experiences


Paperback on AMAZON


Hardcover on AMAZON

eBook on Google

Resource Links:

  A – Z Test Index

  A - Z Index of Spiritual & Religious Assessment 

References for the scale

Ji, C. H. C., & Ibrahim, Y. (2007a). Islamic doctrinal orthodoxy and religious orientations: Scale development and validation. International Journal for the Psychology of Religion, 17, 189 –208. doi:10.1080/ 10508610701402192

Ji, C. H. C., & Ibrahim, Y. (2007b). Islamic religiosity in right-wing authoritarian personality: The case of Indonesian Muslims. Review of Religious Research, 49, 128 –146

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