We obtained significant differences between subjective emo-tional values for positive and negative signals in comparison withneutral signal (p≤0.05). However, there were no differences betweenneutral and tone signals. Male and female subjects also did not revealany significant differences in appraisal of their affective states as wellas in ERS/ERD objective data during acoustical stimulation. In deltafrequency band event-related synchronization was found in allderivations for positive and negative stimuli during 1st second afterstimulus presentation started (р≤0.05). In theta frequency bandevent-related synchronization was found in all derivations duringpositive, negative and also neutral stimuli in 1st second afterstimulus presentation started (р≤0.05). In theta frequency band,event-related synchronization was found bilaterally in temporalderivations for all four types of stimuli including control signalduring 1st second after stimulus presentation started (р≤0.05). Inalpha band, event-related desynchronization was localized only infrontal derivation during positive stimulus in left hemisphere, andduring negative stimulus in right hemisphere (р≤0.05). This findingis consistent with an approach–withdrawal theory of lateralizationof positive and negative emotional reactions (see Davidson, Irwin,1999). N.Sh.6359.2006.4.

doi:10.1016/j.ijpsycho.2008.05.237

Visual distortion of Poggendorff's figure is connected withvisual–spatial intelligence

L.N. Medvedeva, E.S. Fedorovaa, I.I. Shoshinaba Krasnoyarsk State Pedagogical University, Department BiomedicalBases of Ability to Live of the Person, Krasnoyarsk, RussiabSiberian Federal University, Department of Biophysics, Krasnoyarsk, Russia

Connection between visual–spatial intelligence (VSI) and visualillusions was not exposed to strict experimental check till now. It ispossible to assume two variants of dependence between VSI andvisual illusions. The first variant — VSI and occurrence of illusions arenot connected among themselves. The second variant — inversedependence exists between VSI and visual distortion. The aim of ourwork is the search of connection between VSI and visual distortion ofthe figure causing Poggendorff's illusion. VSI was determinedstandardly according to Eysenck (2005). Size of visual distortion ofPoggendorff's figure in modification by Djastrow was determined byown technique (Medvedev, Shoshina, 2004). It has been surveyed 203practically healthy students of university of both sexes.

It is established that the schedule of distribution of number ofexaminees on VSI has two tops. 48 persons are submitted in the fieldof the left top with low size of VSI. For this group the increase of sizeof distortion of Poggendorff's figure was typical in process of increaseof VSI. In the field of the right top the distribution of number ofexaminees was close to normal type. At these examinees in process ofincrease of VSI the distortion of Poggendorff's figure graduallydecreased on 33%. The two-top distribution of number of examineeson VSI found out by us corresponds to data from two independentlaboratories (Larionov, 2005; Zhukov, 2007). It is shown, that personswith deficiency of iodine are mainly concentrated in the field of theleft top with low sizes of IQ (Zhukov, 2007). We did not define thecontents of iodine in an organism of examinees. Therefore we have nothe direct data about connection between the contents of iodine in anorganism of our examinees and VSI size. However the data aboutinfluence of deficiency of iodine on infringement of mental functionsare well-known. The region in which our examinees live, concerns toregion with iodine deficiency. Therefore we assume that the presenceof the first top in the field of low VSI is also connected to deficiency ofiodine.

Thus, it is proved, that there is the connection between VSI andvisual distortion of Poggendorff's figure. It has complex character asthe direction of connection depends on size of VSI.

doi:10.1016/j.ijpsycho.2008.05.238

The research of personality and time characteristics of people inperception and pattern recognition

S.V. IvanovThe Herzen State Pedagogical University of Russia, Faculty of Biology,St-Petersburg, Russia

It has been already printed in the abstract (see S. Ivanov et al.,2006, Perception 35 abstract supplement, 105) about the trialinvestigation of the experimental data which approve the correla-tion between personality and minimal response time. I have mademore serious research using the program for the psychophysiologi-cal now. This program has a title for researching personal andtemporal reactive characteristics of people during the process ofaccomplishing the sums on perception and pattern recognition. Ihad received the certificate about official registration of the programfor computer №2007613452. August, 15 2007. The application№2007612502. The receive date is 19th June 2007. The questionswere displayed on a monitor screen and the subjects were requiredto answer “yes” and “no” as quickly as possible and to press acorresponding button in this program. I used modernized psycho-logical test of Eysenck for 73 young (17–25 years-old) persons andmade more exact count. The research has shown that 31 men areintroverts (5.48±0.94 s); 42 men are extroverts (4.23±0.86 s) forthe φ=2.43 p≤0.01 Fischer's criterion. The calculation of Student'st-criterion has shown that for 31 introverts (5.48±0.22 s, p≤0.001);for 42 extroverts (4.23±0.21 s, p≤0.001). I have the hypothesis thatthis correlation was reached because a person regulated theintervals between the answers himself. This let him show his typeof personality. The main result of the research is that we got theproof of the slowness of actions of introverts in comparison withextraverts. It's a mean according to the short time of reaction ofpeople.

doi:10.1016/j.ijpsycho.2008.05.239

Localization of the threshold of detection: Difference between lowand high frequency tones

N.G. Bibikov, M.V. TarasovaN.N. Andreyev Acoustical Institute, Bioakusti Department, Moskow, Russia

The major functions of acoustical system are detection andlocalization of external sounds. Psychophysiological studies of thesefunctions used to be done for a very long time. However each ofthese functions usually considered as isolated one. Therefore westudied the tone bursts localization just on a threshold of detection.In a large soundproof chamber, seven loudspeakers were situatedalong the arch of a circle. The angle distance between each loud-speaker was 30°. The distance from each loudspeaker to a head ofthe subject was 3 m. We used 0.2 s tone bursts with rise–fall times20 ms at two quite different frequencies: 0.5 and 4.0 kHz. Thestandard two-alternative forced-choice method for the sounddetection was used. In each trial two intervals separated by 0.6 swere marked by light and the subject should decide which of thetone burst was presented. Moreover, a subject should tell which of

279Posters session 3 / International Journal of Psychophysiology 69 (2008) 276–316