This post is a reaction to recent report about a new study by James Flynn, by which teenagers in Britain should have lower IQ scores than their counterparts did a generation ago (via Reference Frame blog log, where dual opinion of Lubos Motl is presented), you can consider another study. It brought me another few recent reports in mind: the information about evaporation of kilogram meter prototype, dilatation of iridium meter prototype and Pamela Gay's report about violation of standard candle supernovae and many other speculations, too.
How all these apparently different areas MAY be related together? In concept of omnidirectional space-time expansion a strange thing appears: such expansion accelerates gradually, until light isn't able to follow it anymore. We can consider the remote Universe boundary or black hole event horizon as a place, where the light effectively freezes in gradually expanding universe.
By AWT we can imagine a consequences of Universe expansion easier from exsintric perspective dual to space-time expansions: every piece of matter appears like less or more dense blob of Aether density here, i.e. like piece of pre-expanded space-time from classical insintric perspective. The space-time expansion can be interpreted like compactification of vacuum foam as well. After then the difference between density of matter and density of vacuum would decrease during space-time expansion, the observable matter would dissolve in vacuum, because the surface tension forces keeping the particle together will not be strong enough to keep the particle of matter together anymore.
Such insight has a number of testable implications. Every material object will expand in gradually expanding space-time the more, the more compacted space-time it contains, i.e. the more dense is as well. The speed of light, as measured by standing photon waves in solid objects would decrease with compare to values, measured by standing wave in vacuum. This can be interpreted as a slowing of time. And every material object would dissolve into energy of vacuum, i.e. radiation in less or more distant perspective: the faster, the more heavy is - which is commonly observed at the case of massive stars. We can consider a nonzero speed of proton decay, as predicted by some theories in this connection.
As the result, observable matter would become more lightweight with compare to matter in distant past and it would expand as a consequence of gradual decrease of gravity constant. The Expanding Earth theory may emerge immediately, but this concept can be verified even by look into distant past. The frequency if cepheid supernovae explosions, considered as a standard candles will increase gradually, while luminosity of will decrease, because it proportional to total mass converted into radiation in each explosion. This dependence can explain the dark energy phenomena naturally, because the Hubble constant measurement depends on the measurement of relative brightness of cepheid supernovae explosions.
The above phenomena can be related to IQ declination problem of English population. Maybe IQ didn't decrease, but it was transformed into higher dimensions/low distance scope interactions accordingly to increased civilization mass/energy density. Inside of dense gas the interaction scope of particle decreases too: the particle interactions are much faster, but more temporal as well. The social and family relations of members in society would become weaker as well and more promiscuite.
The fast reactions and social IQ becomes more important for survival of each individual, then in the more sparse society. For example, most of teenagers can chat and to send SMS a much faster, then I can do. But theirs knowledge is both more superficial, both more specialized. Our civilization changes into single large nest of giant ants.
After all, we can observe it even in theoretical physics. Many contemporary physicists are brilliant specialists - but their knowledge of various subtleties of Victorian physics are very schematic and superficial. They're separated from reality by the same way, like from the rest of society. Without math support they cannot estimate and predict (nearly) anything correctly. The ability of non formal thinking is sadly lacking. Which is sad sometimes, as they're believe, their level of specialization gives them a qualification to advice people in other areas (like politics, economy, global warming and so on). While exactly the opposite becomes true often from obvious reasons.
By my opinion, this specialization is not a result of laziness or dumbness, but rather sort of adaptation to increasing volume of informations. Nearly nobody requires hand writing or mental arithmetic like square rooting today, to solve algebraic equations the less. After all, these tasks can be handled by hand computers and software tool easily, so I don't see a large problem here - we cannot simply handle everything. This situation increases importance of simple general ideas, from which many subtleties can be derived easily on demand. The importance of overcomplicated theories will decline by the same way, like the significance of command line and assembly languages decreased under income of moder high level object languages and GUI based operational system.
So experts have developed various IQ tests, the purpose of which is to measure an IQ in general way, but their metrics didn't change with time so fast, like the preferences of society. Therefore we are facing the same effects inside of our society like inside of our Universe - just in perspective few dimensions closer to human brain perspective. From internal perspective we can see, how our IQ grows, while it still collapses from exsintric perspective.