Cognition-hoods, or Tall-Yor as they were originally called, functioned as the primary method by which the Yuuzhan Vong communicated with and controlled their living starships. Rather than being independent entities, Cognition-hoods were integrated components of the shaped vessels themselves, establishing a link to their pilots via neural cusps. These hoods transmitted data to the pilot in the Yuuzhan Vong language, typically sourced from a yammosk. It was also thought that the hoods reacted to specific physical actions and movements unique to the Yuuzhan Vong. Besides enhancing ship control, cognition hoods also served as a communication device, enabling pilots to converse amongst themselves. Furthermore, these hoods possessed the ability to record pilot actions, aiding in the planning of precise maneuvers and targeted assaults.
The cognition throne represented a larger version of this technology.