Brain autopsies have revealed that a significant number of people die with Alzheimer’s disease evident in their brain, although in life their cognition wasn’t obviously impaired. From this, the idea of a “cognitive reserve” has arisen — the idea that brains with a higher level of neuroplasticity can continue to work apparently normally in the presence of (sometimes quite extensive) brain damage.
Articles
Why do we need sleep?
A lot of theories have been thrown up over the years as to what we need sleep for (to keep us wandering out of our caves and being eaten by sabertooth tigers, is one of the more entertaining possibilities), but noone has yet been able to point to a specific function of the sleep state that would explain why we have it and why we need so much of it.
Consider our facts about blood:
- arteries are thick and elastic and carry blood that is rich in oxygen from the heart.
- veins are thinner, less elastic, and carry blood rich in carbon dioxide back to the heart.
We could, as is often advised, simply turn these into why questions. And we can answer these on the basis of the connections we’ve already made:
Why are arteries elastic?
Because they need to accommodate changes in pressure
Why are arteries thick?
Because they need to accommodate high pressure
K. Anders Ericsson, the guru of research into expertise, makes a very convincing case for the absolutely critical importance of what he terms “deliberate practice”, and the minimal role of what is commonly termed “talent”. I have written about this question of talent and also about the principles of expertise. Here I would like to talk briefly about Ericsson’s concept of deliberate practice.
The role of melody in helping recall
The most obvious connection between language and music is that music can be used to help us remember words. It has been convincingly shown that words are better recalled when they are learned as a song rather than speech - in particular conditions.
In general, the weight of the research evidence suggests that college students tend to have a poor sense of how prepared they are for testing, and having been tested, they have a poor sense of how well they did! (This, of course, is even more true of younger students).
Does it matter?
"I'm terrible at remembering names"
"I'm great with names, but I'm hopeless at remembering what I've read."
"I always remember what people tell me about themselves, but I'm always forgetting birthdays and anniversaries."
There is no such thing as a poor memory!
There will be memory domains that you are less skilled at dealing with.
Information comes in different packages
Think about the different types of information you have stored in your memory:
As I said in my discussion of different scripts, the Hellenic languages use the Greek alphabet. Here it is. I’m afraid the table is a little complicated, because (a) each letter has a name, which it’s useful to know, and (b) there are some differences in pronunciation between Ancient Greek (which is still a language that people want to learn today), and Modern Greek.
Difficulty in remembering people’s names is one of the most common memory tasks that people wish to be better at. And the reason for this is not that their memory is poor, but because it is so embarrassing when their memory lets them down.
This isn’t just an issue at a personal level. It’s a particular issue for anyone who has to deal with a lot of people, many of whom they will see at infrequent intervals. Nothing makes a person — a client, a customer, a student — feel more valued than being remembered.
Compulsory Education: When it starts and how long it lasts
Around the world, for the most part, compulsory schooling starts at 6, although some start at 7, and a very few at 5 or even younger. There is less consensus about how long compulsory education should last, but 9 years is the most common length, with 10 years running a close second.