How to Improve Your Memory & Cognitive Function at Any Age | Dr. Alan Castel

Memory is a mental representation of the past that is reconstructive and not always accurate. What we remember is influenced by our metacognition (awareness of our own cognition), the depth of processing, and emotional attachment to the information.

Mnemonics can be a workaround for arbitrary links, but they are effortful and can lead to predictable memory errors. Deeper semantic learning, which involves visualizing or interacting with information, is generally more effective for understanding and remembering complex subjects.

Deeper learning involves engaging with information at a semantic level, such as visualizing concepts, understanding interactions, and connecting new information to existing knowledge, rather than just memorizing terms.

We often stop noticing familiar objects due to habituation, where repeated exposure without active engagement leads to a lack of attention to their specific features. This is the difference between merely 'seeing' and actively 'noticing' something.

The act of deciding to take a picture can sometimes improve memory for the event, as it involves a conscious selection process. However, it can also worsen memory if the intention is to offload the need to remember, relying on the photo instead.

Our brain's reconstruction of the past shares similar neural signatures with imagining the future. Our ability to envision future scenarios is fundamentally based on and constrained by our past experiences and memories.

Eyewitness memory can be unreliable, even in highly traumatic and salient events. Confidence in a memory does not always equate to accuracy, and memory can be contaminated by subsequent information or the identification process itself.

Everyday memory refers to the basic function of remembering things needed for the present, like a hotel room number. Selective forgetting is healthy because it allows the brain to update information, discard irrelevant details, and make room for new, more pertinent memories.

This behavior can be attributed to several factors, including a decline in source memory (forgetting who they told it to), a desire for nostalgia and familiarity, and a positivity bias that leads them to rehash positive or meaningful stories.

Memory decline is not entirely inevitable or linear. While some forms of memory and brain volume may decrease, certain memory systems can remain stable or even improve. Factors like physical exercise, sleep, and positive beliefs about aging can significantly influence cognitive health.

Balance is often overlooked but crucial, as one in four people over 65 experience a fall, which can lead to serious injuries and further decline. Balance is highly trainable and can be improved with targeted exercises.

Subjective age, or how old one feels, is a better predictor of how long a person will live than their biological age. Most people over 40 feel about 20% younger than their actual age.

Having goals and a sense of purpose can activate brain structures like the anterior midcingulate cortex, which is involved in pushing through friction. This striving for a future state may contribute to a 'will to live' and overall cognitive maintenance.

During COVID-19, older adults showed more psychological resilience than younger adults. Their past experiences with adversity (wars, financial meltdowns, personal losses) equipped them with coping mechanisms for social isolation and uncertainty.

The 'ABCs of Successful Aging' are a framework for thriving in later life: Attitude (maintaining a positive outlook), Balance (finding equilibrium in physical and mental activities), and Connection (fostering meaningful social relationships).

Trait curiosity (general curiosity) tends to decline with age, but state curiosity (curiosity about specific interesting information) can increase. Older adults leverage this by selectively remembering things they are most curious about and forgetting what they don't care about.

AI can exacerbate scams by generating convincing fake voices (e.g., of a grandchild in distress) that prey on the emotional connections and trust of older adults, making them more vulnerable to fraud.

Knowledge is the accumulation of facts and information, while wisdom is the ability to apply that knowledge effectively and appropriately, especially in complex or novel situations, often drawing on life experience.

While some cognitive functions may decline, the brain can get 'better' in certain qualitative ways with age. This includes improved emotional regulation, greater peace and contentment, and the ability to focus on what truly matters, leading to a richer internal experience.