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Scientific Discussion This forum is limited to published/presented scientific research, in a quasi-academic format, with references where appropriate; clear and structured discourse is encouraged

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Old 03-31-18, 03:06 AM
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Fluorescent light and attention.

HEre is an interesting one:
An interesting reflection on lighting and its effect on brain function:




The concept of Critical Flicker Threshold is of clinical significance as it is directly proportional to processing speed and hence IQ.

This can be measured with a critical flicker fusion test.

"‘Critical flicker fusion’ test can measure the brain’s processing speed" by Jessica Hall at ExtremeTech




Individuals with a high critical flicker threshold will be able to see the flicker between pulses of light at a much higher threshold than others.

An example of this is the ability to see the flicker of fluorescent lights. I am told many people cannot see this- I never knew that they could not. However this may be a perilous capacity to have:

From Wikipedia:
http://en.wikipedia.org/wiki/Flicker_fusion_threshold
Quote:


"Individuals with high critical flicker fusion threshold are particularly affected by light from fluorescent fixtures that have magnetic ballasts: their EEG alpha waves are markedly attenuated and they perform office tasks with greater speed and decreased accuracy. The problems are not observed with electronic ballasts."
So its probably a minor effect- but certainly one that can cause trouble. I've been wondering about this for years.
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Last edited by namazu; 03-31-18 at 03:10 AM.. Reason: Replaced link to commercial website with link to print-friendly version of same article.
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Old 05-28-18, 03:41 AM
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Re: Fluorescent light and attention.

Fluro lights can cause migraines in some people. Since work and home have changed to LED he's had less.
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Old 05-28-18, 02:07 PM
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Re: Fluorescent light and attention.

And, those of us bothered by fluorescents cannot abide any form of TV or movies, since they flicker at the same rate.


BTW, "processing speed" is not endemic to high IQ. High IQ is more a representation of the ability to hold complex constructs in a stable state in the mind.
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Old 05-28-18, 09:35 PM
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Re: Fluorescent light and attention.

Quote:
Originally Posted by WheresMyMind View Post
And, those of us bothered by fluorescents cannot abide any form of TV or movies, since they flicker at the same rate.


BTW, "processing speed" is not endemic to high IQ. High IQ is more a representation of the ability to hold complex constructs in a stable state in the mind.



All things being equal, processing speed should be proportional to IQ- but it is not the only variable to consider. IE A high processing speed individual who was not good with pattern recognition and "openness" (suspending one's current working model to consider a problem in a different way) would theoretically have a lower IQ than one who was good at those skills.

Equally, if you or I became hypothyroid, the decrease in our processing speed and functional IQ would be obvious to us.

It is an interesting proposition- the high sympathetic tone in ADHD would contribute to a relatively higher metabolic rate and processing speed- so theoretically might lift IQ a little.
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