Enhancing and advancing the understanding and study of dreaming and memory consolidation: Reflections, challenges, theoretical clarity, and methodological considerations

The link between dreaming and sleep-dependent memory consolidation remains unclear, with mixed empirical results partly due to the elusive nature of dreams and methodological inconsistencies. This paper critically examines common assumptions and practices in this research area, offering a theoretical synthesis of existing models and evidence. It recommends using Targeted Memory Reactivation (TMR) to investigate whether dream content can be tied to specific cued memory activations. Additional suggestions focus on improving research methods and clarifying why and how researchers search for memory sources in dreams, and what function, if any, those sources might serve.

Study at a glance

Abstract

Empirical investigations that search for a link between dreaming and sleep-dependent memory consolidation have focused on testing for an association between dreaming of what was learned, and improved memory performance for learned material. Empirical support for this is mixed, perhaps owing to the inherent challenges presented by the nature of dreams, and methodological inconsistencies. The purpose of this paper is to address critically prevalent assumptions and practices, with the aim of clarifying and enhancing research on this topic, chiefly by providing a theoretical synthesis of existing models and evidence. Also, it recommends the method of Targeted Memory Reactivation (TMR) as a means for investigating if dream content can be linked to specific cued activations. Other recommendations to enhance research practice and enquiry on this subject are also provided, focusing on the HOW and WHY we search for memory sources in dreams, and what purpose (if any) they might serve.