How Memory Works and What It Means for How Indian Students Should Study

The Two Most Common Study Methods Are Among the Least Effective

The two study methods most commonly used by Indian students — re-reading notes and underlining or highlighting — are among the least effective methods identified in the cognitive science literature. A comprehensive review by Dunlosky et al. (2013), published in Psychological Science in the Public Interest, evaluated ten commonly used study techniques on their evidence of effectiveness. Re-reading was rated 'low utility' — it produces a feeling of familiarity that students interpret as learning but does not produce durable memory or the ability to apply knowledge in new contexts. Highlighting was similarly rated 'low utility' — the physical act of marking text does not require the cognitive processing that produces durable memory encoding. Students who spend hours re-reading highlighted notes are putting in genuine effort while using a technique that cognitive science knows to be largely ineffective.

What Actually Works: Retrieval Practice and Spaced Repetition

Retrieval practice — actively recalling information from memory rather than passively re-reading it — is consistently the highest-rated study technique in the cognitive science literature. The research is robust: testing yourself on material (through practice questions, flashcards, writing down everything you remember about a topic without looking at notes) produces significantly more durable memory than an equivalent amount of time spent re-reading the same material. The counterintuitive element is that retrieval practice feels harder and less comfortable than re-reading — the effort of retrieval is precisely what makes it effective. Spaced repetition — studying material at increasing intervals over time rather than massing all study into one session — is equally well-supported. The 'spacing effect' is one of the oldest and most replicated findings in memory research: a student who studies material on Monday, reviews it on Thursday, and reviews again the following week will remember significantly more one month later than a student who studies the same material intensively for three hours on Monday alone.

Interleaving and Elaborative Interrogation

Interleaving — mixing different types of practice problems rather than blocking by type — is counterintuitive but effective, particularly in mathematics and sciences. Students who practise five geometry problems, then five algebra problems, then five statistics problems — interleaved — outperform those who practise fifteen geometry problems, then fifteen algebra, then fifteen statistics, despite the interleaved practice feeling harder and producing lower performance during the study session itself. The difficulty is the learning. Elaborative interrogation — asking 'why?' about information rather than accepting it passively — forces the cognitive processing that produces durable encoding. Instead of 'the Krebs cycle produces ATP,' the elaborative question is 'why does the Krebs cycle produce ATP? What would happen if it didn't? How does this connect to what I already know about energy in cells?' These questions require and produce understanding rather than memorisation. Siksa For India's engagement with learning science in Indian schools focuses specifically on helping students and teachers understand and apply these principles. For more, explore the Cognitive Science & Teaching category at anhayafoundation.com.