Talk:Mental calculation
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I'd like to add:
Many practitioners believe it develops and trains the mind, improves visualization and intelligence. —The preceding unsigned comment was added by Jondel (talk • contribs) .
[edit] "Only the brain" or brain and hands (and toes)
If this article is about "doing mathematical calculations using only the human brain", shouldn't the info about doing it with the hands be removed? Alternatively, the intro should be changed from saying "only the human brain". Nurg 02:42, 17 December 2005 (UTC)
- I agree in principle, the article is about mental calculation, if we include the use of hands we might as well include the use of paper/calculator/South-African monkey. However, I don't think `mental calculation' competitions prohibit the use of digits, and many people seem to instinctively use digits when doing mental calculations anyway. Discussion? //Biggoggs 04:30, 5 June 2006 (UTC)
- Well, there is also using a real abacus and creating a mental image of an abacus . I think if the person mentally creates the digits and hands it would be ok. However if the physical hands/digits were used then I think this should not be included.--Jondel 05:36, 5 June 2006 (UTC)
[edit] Citation needed
"Mental calculation is said to improve mental capability, speed of response, memory power and concentration.? Said by who? I'm going to add a [citation needed] to this, it's a bit steep without a reference... //Biggoggs 04:30, 5 June 2006 (UTC)
- Sorry Biggoggs, this is the pertinent reference source concerning mental capability , etc. : http://www.scciob.edu.sg/index.cfm?GPID=24 .--Jondel 05:11, 5 June 2006 (UTC)
This is another source :http://www.ucmasusa.com/MA/PressRelease.htm concentration
I hope the citation is ok now(?).--Jondel 05:39, 5 June 2006 (UTC)
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- I don't think those sources are acceptably `pertinent', I can't see anything relevant on the ucmasusa.com site, and the scciob site basically says;
- This skill has proven to be beneficial in improving one's mental capability, increasing one's speed of response, memory power and concentration power. This course has become a compulsory curriculum in many countries such as Taiwan, China and Japan, and countries such as India, Malaysia and Singapore have introduced the curriculum to schools.
- Until a `respectable source' can be found, I think it's best left as cite-needed or removed altogether... Biggoggs 06:58, 5 June 2006 (UTC)
Like from a psychologist, doctor,etc ? OK then, I'll restore the cite request .In the meantime I'll still search the web for such a source. --Jondel 07:21, 5 June 2006 (UTC)
- Yea, something like a research paper, or at least an article with resources would be better. Biggoggs 07:51, 7 June 2006 (UTC)
- Ok , that is why below , remove. But you remove, not some ip I don't know. I've put too much work into this and I believe it does improve mental capabilites not only in calculation. When I do find authoritive sources, I will reinstall and place the sources at the bottom. If we can comprimise, leave as cite needed? --Jondel 07:29, 8 June 2006 (UTC)
I personally experience that it improves concentration and it seems obvious. Can we at least say 'Proponents advocate that it improves concentration, memory power, etc?'.--Jondel 08:30, 7 June 2006 (UTC)
- That would essentially be saying the same thing. I think a claim like that needs to be referenced from an academic source, not 'person opinion' or 'a friend thinks [x]'; it doesn't seem obvious to me. =Biggoggs 07:10, 8 June 2006 (UTC)=
If needed pls remove the part about concentration et al. However, I've found a few statements from doctors not too mention personal experience of others. I need time.--Jondel 00:00, 8 June 2006 (UTC)
I hope these sources are conclusive and reliable enough?--Jondel 04:33, 19 June 2006 (UTC)
[edit] Multiplying by 2
The article claimed: "Still, the product must be calculated from right to left" I think it's not necessarily true. I've seen a method to do that from left to right: http://shifengshou.com/english/htm/shifenngshou_what1.htm
Samic 22:34, 10 August 2006 (UTC)
