alt Hacker NewsHumans peak in midlife: A combined cognitive and personality trait perspective
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> Yet, human achievement in domains such as career success tends to peak much later, typically between the ages of 55 and 60. This discrepancy may reflect the fact that, while fluid intelligence may decline with age, other dimensions improve (e.g., crystallized intelligence, emotional intelligence).
Isn't it about accumulated human capital (aka social networks) and experience more than anything else?
If fluid intelligence is based on the ability to recognize new patterns (unsupervised learning) and crystallized intelligence on recognizing known patterns (supervised learning), then more than physiology, age alone may differentiate the two.
Youngsters know no patterns so they can't match new events to known ones. Oldsters know that most seemingly new stuff is not really new, it's just the same old stuff, so they reduce the cost of thinking and reject the noise by adding the new unlabeled event to an existing cluster rather than creating a new noisy one. That's wisdom. But that's also a behavior that will inevitably increase as we age and our clusters establish themselves and prove their worth.
So aren't those two forms of intelligence less about a difference in brain physiology and more about having learned to employ common sense?
Reading the abstract it would seem a good reason for positions in government like the President to be restricted to ages 40-65.
Since when is 20 midlife?
Perhaps fluid intelligence peaks at 20 because the drinking age is 21.
I'm a layman to this jargon, but are 'crystallized intelligence' and 'emotional intelligence' in any actual sense 'intelligence'? I can't see how these terms mean anything other than judgement, experience, maturity etc, which are already good enough labels for this stuff. Can anyone explain what these flashier new terms offer over them?
This is pretty silly. Your memory obviously gets a little worse as you age, with most of the noticeable decline coming in very late age. But the artificial measures/definitions of things like "fluid" intelligence are mostly useless. Just pulling up one of the studies cited in the article which is supposed to measure the "reasoning" aspect of "fluid" intelligence, presents a huge host issues immediately [1].
Aside from the lack of randomization, you have obvious validity problems. The interpretation of nebulous words like "reasoning" as being accurately measured by e.g. accuracy on Raven matrices (construct validity?) and younger participants having been primed by recent test-taking experience while real-world reasoning skills aren't really reflected - it's all quite specious.
Real-world decisions are value-laden and constraint-laden! "Intelligence" does not mean "maximizing abstract pattern detection". If you keep your brain active with a wide range of creative, interesting problems, you will be fine apart from neurodegenerative diseases, which have real effects.
Do we peak or are there fewer patterns than we want to believe and eventually accept and just quit looking?
Sure we can generate syntactic and semantic descriptions endlessly but to use software as an example, we made a lot of the same things that look different only in the symbols used.
Ansible and Chef. Terraform and Pulumi. Ruby and Python. Windows and Linux. Burger shack 1, burger shack 2. They all solve the same problem.
Being able to generate semantics endlessly does not upend our daily patterns and routines. Life on Earth is pretty obvious.
I quite like this paper. Does a great job laying out scientific support for things we already "knew" in our guts - like having retirement ages at around 65, for instance, being an ideal milestone to start transitioning folks from leading hard work to supporting activities.
Where I worry is that these papers will be used to justify ageism. Looking through these comments, there's quite a lot of positions being bandied around that I've heard justify some truly atrocious hiring/firing decisions before, and we need to be cognizant of the reality that age alone is not an indicator of success or failure for a given role or task. It's helpful to keep looking into this, but we also need to be aware of our own biases.
Fluid intelligence is the confidence you feel at trivia night in the third round
Whoop!
Still in the game :-)
Is this a "How to lie with statistics" paper, where investigator-selected parameters for the weighted average determine the result?
> Fluid intelligence, which peaks near age 20 and declines materially across adulthood [...] while fluid intelligence may decline with age, other dimensions improve (e.g., crystallized intelligence, emotional intelligence)
As someone well past "peak" fluid intelligence at this point, I always hate reading research like this. "Crystallized intelligence" and "emotional intelligence" are the consolation prizes no one really wants.
I'd rather we instead perform research to identify how one might reverse the decline of fluid intelligence...