Knowledge Acquisition during Exam Preparation Improves Memory and Modulates Memory Formation.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Educational Technology

Background:

• The schema-relatedness hypothesis posits that new experiences are better remembered when linked to existing knowledge.
• Real-world knowledge acquisition's impact on the neural basis of memory encoding remains an active area of research.

Purpose of the Study:

• To investigate how accumulating schematic knowledge influences the neural correlates of episodic memory encoding.
• To examine the relationship between real-life knowledge gains and brain activity during memory formation in medical students.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to scan medical students before and after their final exams.
• Participants encoded associative information varying in relevance to medical knowledge (face-diagnosis vs. face-name pairs).
• Knowledge accumulation was tracked using a web-based learning platform.

Main Results:

• Memory performance improved more for knowledge-relevant (face-diagnosis) than for less relevant (face-name) pairs.
• Improved memory for knowledge-relevant information correlated with reduced hippocampal activation and increased connectivity between the anterior hippocampus and the left middle temporal gyrus.
• Knowledge accumulation, assessed independently, predicted these neural changes.

Conclusions:

• Knowledge accumulation actively sculpts neural networks involved in memory formation.
• There are close links between knowledge acquired through studying and neurocognitive processes underlying durable memory.
• This study demonstrates the utility of integrating laboratory cognitive neuroscience with real-world educational technology.