This project includes documentation supporting the implementation of the [Transparency and Openness Promotion (TOP) guidelines][1] and [Badges for Open Practices][2] at the journal *Cortex*. Materials include [author guidelines][3], [FAQs][4], submission checklists for [regular articles][5] (including Research Reports, Letters, Notes and Exploratory Reports), for [Stage 1][6] and [Stage 2][7] Registered Reports, and the [TOP introductory editorial][8]. The Registered Reports checklists also incorporate features and requirements of the *Cortex* [Registered Reports policy][9]. *Cortex* achieves a minimum of Level 2 on all TOP standards and awards Open Data, Open Materials and Preregistered badges. Checklists are implemented using the Elsevier Editorial System (EES). [1]: https://cos.io/top/ [2]: https://cos.io/our-services/open-science-badges/ [3]: https://osf.io/xnvg9/ [4]: https://osf.io/jv8qk/ [5]: https://osf.io/5stjg/ [6]: https://osf.io/xm6wg/ [7]: https://osf.io/5gmb8/ [8]: https://osf.io/qjwdu/ [9]: http://cdn.elsevier.com/promis_misc/PROMIS%20pub_idt_CORTEX%20Guidelines_RR_29_04_2013.pdf