I apologize, but I couldn't find specific information regarding a constructivist theory associated with Brunner. It's possible that you may be referring to a theory or concept that is not widely recognized or attributed to a well-known figure in the field of psychology or education.
Constructivism is a broad theoretical framework that emphasizes the active construction of knowledge and understanding by individuals based on their prior experiences, interactions, and mental processes. It suggests that learners actively build their own understanding of the world by engaging with new information and integrating it with their existing knowledge and beliefs.
If you could provide more context or details about Brunner and their constructivist theory, I may be able to assist you further.