Three Towns Forum

Members' Lounge => Science and Technology => Topic started by: Trojan on October 28, 2010, 05:01:56 am

Title: Optical Illusions
Post by: Trojan on October 28, 2010, 05:01:56 am
Look at the chart below and say the COLOUR of the word,
not the word itself.

Why is it so difficult? Because the right half of your brain
is trying to say the color, while the left side of your brain
is trying to say the word.


 
:-X
Title: Re: Optical Illusions
Post by: Trojan on October 28, 2010, 05:11:23 am
How many Fs do you see in the text below?


FINISHED FILES ARE THE RE-

SULT OF YEARS OF SCIENTIF-

IC STUDY COMBINED WITH THE

EXPERIENCE OF YEARS.





After you counted the Fs, scroll down...

















How many did you count? 3?

Wrong, there were 6. Don't believe it?
Scroll back up and check. Or scroll down
for the solution...









Our brains are trained to overlook the word OF.

If you saw all 6 Fs right away, you're a genius.

Most people see only 3 Fs. Some people see 4.
Title: Re: Optical Illusions
Post by: Merddin Emrys on October 28, 2010, 06:38:06 am
amazing I only saw 3  *&(
Title: Re: Optical Illusions
Post by: Nemesis on October 28, 2010, 11:10:30 am
Me too !, I did the first one OK , but not the Fs :o
Title: Re: Optical Illusions
Post by: Merddin Emrys on October 28, 2010, 11:19:12 am

http://www.grand-illusions.com/opticalillusions/dragon_illusion/ (http://www.grand-illusions.com/opticalillusions/dragon_illusion/)

have a go making one its brilliant!  $wales  D)

http://www.grand-illusions.com/images/articles/opticalillusions/dragon_illusion/dragon.pdf (http://www.grand-illusions.com/images/articles/opticalillusions/dragon_illusion/dragon.pdf)
Title: Re: Optical Illusions
Post by: Yorkie on October 28, 2010, 12:39:54 pm
Aoccdrnig to rscheearch at an Elingsh uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat ltteer is at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae we do not raed ervey lteter by it slef but the wrod as a wlohe. gdooybe

(Taht wlil fcuk the splelchekcer)
Title: Re: Optical Illusions
Post by: Trojan on November 04, 2010, 03:35:31 am
Stare at the grey dot in the centre of the circles.

Now move your head forward and backward.
As your head moves closer to your monitor
and then back away from your monitor, the circles
will appear to be moving.
Title: Re: Optical Illusions
Post by: Paddy on November 06, 2010, 01:37:56 am
.
Title: Re: Optical Illusions
Post by: Trojan on November 06, 2010, 03:04:50 am
I bet you didn't see a lamp at first.  8)
Title: Re: Optical Illusions
Post by: Yorkie on November 06, 2010, 07:32:26 am
Of course we did, what do you think we are, perverts?    _))*   _))*
Title: Re: Optical Illusions
Post by: Pendragon on November 08, 2010, 11:51:46 pm
this does your head in after a bit  _))++

Title: Re: Optical Illusions
Post by: Pendragon on November 09, 2010, 12:00:19 am
This is really clever.  Maybe CCBC should hire the artist.
Title: Re: Optical Illusions
Post by: Ian on November 17, 2010, 03:48:57 pm
.
Title: Re: Optical Illusions
Post by: Ian on November 17, 2010, 03:49:27 pm
Take the classic visual illusion called the Müller-Lyer illusion - the one with two lines of equal length, where line "a" appears shorter than line "b" simply because of the way the arrows on their ends are oriented (see diagram). Way back in the early 1960s, psychologist Marshall Segall at the University of Iowa in Iowa City led a team testing the susceptibility of people from different cultures to this illusion. They manipulated the length of the two lines until observers judged that they were the same, then recorded this point of subjective equality (PSE) - the extent to which "a" had to be made longer than "b" for the two to be judged equal.

PSE is a measure of the strength of the illusion, and Segall found that students in Evanston, Illinois, were by far the most affected, requiring "a" to be almost 20 per cent longer than "b" before they judged the two equal. The PSE for the aboriginal San people of the Kalahari desert, at the other end of the spectrum, was close to zero. The illusion wasn't even an illusion for them.

This finding is not as trivial as it might at first appear. It implies that a fundamental aspect of perception, which had till then been assumed to be hard-wired and therefore common to everyone, is actually shaped during our development by some aspect of the culture in which we live. Though we are far from understanding this effect, Segall and colleagues suggested a possible explanation: people who grow up among carpentered corners - WEIRD people, for example - might be tuned by the geometry of their world to render them more susceptible to the illusion.

So, if you are WEIRD, you perceive the world oddly. You also have a funny way of describing it. English, the lingua franca of the WEIRD world, relies on a system for locating objects that is egocentric or relative to self, as do other Indo-European languages. So an English speaker might say: "The police officer is to the left of my car". It was assumed for a long time that this was true of all languages - but then exceptions began to crop up. These usually entailed an allocentric frame of reference, describing the location of objects relative to points outside the self, such as the points of the compass ("The police officer is west of the car") or some other object ("The police officer is between the car and the kerb").
Title: Re: Optical Illusions
Post by: Ian on November 17, 2010, 03:52:43 pm
One key factor underpinning morality is fairness. What is considered fair was long thought to be a universal human trait, but Henrich, working with a team of anthropologists and economists, has shown otherwise. The researchers looked for cross-cultural differences in people's sense of fairness using a game in which one person offers a percentage of a known sum of money to another, anonymously, on the condition that if the second person accepts the offer they both keep their respective shares, but if the second person rejects it neither of them gets anything.

The team found huge differences in behaviour. Strikingly, WEIRD people tended to make the largest offers - around 50 per cent - and when WEIRD folk were in the receiver's position, they were most likely to punish low offers with an outright rejection. People from small-scale societies make lower offers and are less likely to punish low offers from others. In other words, it was the people from the small-scale societies who adopted the more rational approach: this was free money, after all
Title: Re: Optical Illusions
Post by: Merddin Emrys on January 07, 2011, 10:38:29 pm
just had this sent to me, I could do it quite quickly  D) I know that the first part Yorkie did some time ago, but it still works!

If  you can raed this,  you have a sgtrane mnid,  too.

Can you raed  this? Olny 55 plepoe out of 100   can. I cdnuolt  blveiee that I cluod   aulaclty uesdnatnrd what I was  rdanieg.  The  phaonmneal pweor of the hmuan mnid,   aoccdrnig to  a rscheearch at Cmabrigde   Uinervtisy, it dseno't  mtaetr in what  oerdr  the ltteres in a word are,  the olny  iproamtnt tihng  is that the frsit and  last  ltteer be in the rghit  pclae. The rset can   be a taotl mses and you can  still raed it   whotuit a pboerlm. This is bcuseae the   huamn  mnid deos not raed ervey lteter by   istlef, but  the word as a wlohe. Azanmig  huh?  Yaeh and I  awlyas tghuhot slpeling  was ipmorantt! If  you  can raed this  forwrad it

FORWARD ONLY IF YOU CAN READ IT
Forward it  & put 'YES' in the Subject   Line

Even if you are not old, you will find this interesting...

     
 Short  Neurological   Test

 1-   Find the C below..  Please do not use any   cursor  help.

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOCOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

2-   If you already  found the C, now find the 6    below.

99999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999
69999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999

3    - Now find the N below. It's a little more    difficult.

MMMMMMMMMMMMMMMMMMMMMMMMMMMMNMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM

This   is NOT a  joke. If you were able to pass  these 3  tests, you  can cancel your annual visit to your neurologist.  Your brain is great and you're far from having a close relationship with Alzheimer.

Congratulations!

 
 

.











Title: Re: Optical Illusions
Post by: Ian on January 08, 2011, 08:23:16 am
That test is affected to a small degree by the font you force.  I always force Bookman, which is a serif font, but a sans serif font would make that last test very tricky, I'm guessing.
Title: Re: Optical Illusions
Post by: Yorkie on January 08, 2011, 11:04:47 am
It is really a matter of looking for the exception.  e.g. on the N test don't look for the N, look for a missing right hand slope / .  Look for a missing curve on the C )   and look for the bottom loop on the 6.   ZXZ
Title: Re: Optical Illusions
Post by: Scott on January 09, 2011, 09:26:10 pm
Not a problem seen the first one before & my typing is like that most of the time anyway, if I don't cnoctratete or I try to type too qkcluiy.

The others needed my specs but quite easy .  8)
Title: Re: Optical Illusions
Post by: Ian on February 08, 2011, 10:27:44 am
An old trick, but scientists still have no real idea what happens or why it works...
Title: Re: Optical Illusions
Post by: Ian on February 08, 2011, 10:33:51 am
New Scientist is having a 'Weird' week.  The images above, and several other fascinating illusions, are here:

http://www.newscientist.com/blogs/nstv/2011/02/friday-illusion-test-your-sense-of-size.html?DCMP=NLC-nletter&nsref=illusiontest (http://www.newscientist.com/blogs/nstv/2011/02/friday-illusion-test-your-sense-of-size.html?DCMP=NLC-nletter&nsref=illusiontest)

You might have to register before viewing them, but it's a comparatively painless and free experience.
Title: Re: Optical Illusions
Post by: brumbob on February 10, 2011, 06:51:00 pm
I love street art illusions, very clever stuff

http://www.moillusions.com/2006/03/chalk-drawing-illusions.html (http://www.moillusions.com/2006/03/chalk-drawing-illusions.html)


(http://photos1.blogger.com/blogger/5639/2020/1600/beever.jpg)
Title: Re: Optical Illusions
Post by: Merddin Emrys on February 10, 2011, 07:45:19 pm
can't see it, or is that the illusion  L0L


following your link though, I've seen this type of art before and yes they are incredible
Title: Re: Optical Illusions
Post by: brumbob on February 11, 2011, 05:17:45 pm
can't see it, or is that the illusion  L0L
_))* _))* _))* obviously doesn't like hot linking

Imagine having this brilliant Edgar Mueller drawing on the prom

The Crevasse - Making of 3D Street Art (http://www.youtube.com/watch?v=3SNYtd0Ayt0#ws)


Title: Re: Optical Illusions
Post by: DaveR on February 11, 2011, 08:18:18 pm
Must be very difficult to get the perspective just right on those.
Title: Re: Optical Illusions
Post by: Pendragon on February 11, 2011, 08:56:49 pm
They are amazing pics.  Hubbie was saying when he went to Silverstone last year a fella called Ian Cooke did this painting of Lewis Hamilton using remote control cars.
Title: Re: Optical Illusions
Post by: Trojan on February 12, 2011, 01:40:39 am
I can't see Lewis using any remote control cars in the painting.

Are they hidden in his shorts?
Title: Re: Optical Illusions
Post by: Yorkie on March 08, 2011, 08:48:38 pm
More illusions
Title: Re: Optical Illusions
Post by: Pendragon on March 08, 2011, 08:54:04 pm
 :o  that reminds me of the old stripey Aberconwy School shirts.  They made your eyes go funny.
Title: Re: Optical Illusions
Post by: Yorkie on March 08, 2011, 09:12:50 pm
I never had a school uniform.   Even as a boy I had to wear my Sister's hand me downs.  L0L L0L


 
Title: Re: Optical Illusions
Post by: Pendragon on March 08, 2011, 09:30:50 pm
ah bless is that you on the right  :o  :roll: You look del
Title: Re: Optical Illusions
Post by: Yorkie on March 09, 2011, 08:06:08 am
Just a bit before my time.


One day I was sent to school in one of my Sister's old dresses, and the Teacher had on exactly the same dress.  He wasn't too pleased I can tell you!      L0L
Title: Re: Optical Illusions
Post by: Ian on March 09, 2011, 08:25:28 am
 _))* _))* _))*
Title: Re: Optical Illusions
Post by: Pendragon on March 09, 2011, 08:47:57 am
 _))* like it Yorkie
Title: Re: Optical Illusions
Post by: Trojan on March 10, 2011, 06:33:12 am
 L0L
Title: Re: Optical Illusions
Post by: Trojan on March 21, 2011, 03:42:51 am
How are the dice set-up?
Title: Re: Optical Illusions
Post by: Yorkie on March 21, 2011, 07:41:30 am
Rather awkwardly!    L0L    L0L
Title: Re: Optical Illusions
Post by: DaveR on January 11, 2013, 06:32:57 pm
An optical illusion, featuring a cat wearing a bowtie:
Title: Re: Optical Illusions
Post by: Merddin Emrys on January 11, 2013, 07:28:23 pm
I'm seeing a slight pulse, is that it or should the bow tie revolve?  :laugh: