Although dated 2018, this article has only just come to my attention. Possibly it has also escaped the attention of other students of the church order literature: Andrzej Rafał Hołasek, “Catechumens in the East in the Light of Pseudo-epigraphic Normative Church Sources from the 4th Century” Studia Ceranea 8 (2018), 139-151.
Abstract: The article discusses the requirements that 4th-century catechumens in the East were expected to meet. Accordingly, the pseudo-epigraphic Church regulations found in the Canons of Hippolitus and in the Apostolic Constitutions are analysed. It can be seen from these texts that their authors showed considerable concern for maintaining high standards associated with the period of the catechumenate; furthermore, they put considerable emphasis on the adherence to the Church regulations and the implementation of Christian standards of thought in daily life.
The article is not earth-shattering in its originality, but is a careful study, taking care to hear the voices of the redactors, rather than their Hippolytean sources.
Personally it leads me to reflect, not for the first time, on my own practice of catechesis, and the manner in which the formation of a habitus is far more important than any imparting of information.