The Canadian scientists investigated often meeting phenomenon «I look for, and I can not find», and have drawn a conclusion that its roots lie in discrepancy of speeds of the impellent system which is responsible for search of the gone thing, and perceiving departments of a brain, reports newscientist.com.
You are late for work and cannot find keys. You feverishly rummage things, without managing to realise, what exactly you see in the course of search, confirms Grayden Solman (Grayden Solman) and his colleague from Waterloo University in Ontario.
For modelling of a studied situation the group of scientists has created the simple computer test in which the examinee needs to find a certain colour figure among many other for the minimum time. The computer fixed the movements by a mouse made by the volunteer.
Researchers have found out that their experimental surprisingly often passed a required figure. To find out, why, they have made additional experiment.
At first scientists have assumed that examinees forget object of search. For verification of this theory, experimental the list of subjects which they should remember before starting the main task in figure search on the monitor has been issued. After figure detection they should reproduce that have remembered. The purpose of experiment was «to load memory» that examinees could not keep more than any data in the short-term memory. However, it has appeared that complication of a task does not influence in any way speed of detection of a colour figure and for percent of mistakes by search.
To check, whether volunteers pay sufficient attention to moved subjects, scientists have made one more experiment. On the monitor examinees saw a large number of cards with the colour figures represented on them, and figures were visible only at the moment of card moving. But it again has not affected search results.
Then researchers have analysed mouse movement in the course of figure search by the volunteer, and have found out that after the examinee passed required object, movement of a mouse was slowed down. Solman's team has drawn a conclusion that the brain sites, responsible for movement, works too quickly, and the system of processing of visual signals simply behind it is not in time. That is, while you overturn the house upside down in search of the gone keys, you let's time to a brain analyse that actually he sees. In this case it will be useful to offer in the speed for the sake of efficiency of process.
Delay of movements of a mouse testifies that somehow volunteers understand that have passed object of search that proves to be true other experiments when people as slowed down the actions after understood that have made a mistake. Solman considers that it is attempt of a brain to slow down motor system to manage to decipher a visual signal.
«Interesting that fact is represented that motor and perceiving systems, helping you to find lost, are not connected among themselves and operate in itself», - Todd Horovits (Todd Horowitz) from University of Harvard speaks.
The conclusions made by scientists, have the social importance and can force to reconsider processes of studying by doctors of x-ray pictures or luggage examination by security service.