Dynamical proprieties of "internal clock" as neural basis of individual differences in the level of intelligence
Neuropsychological evidence has suggested that both intelligence and temporal resolution in information processing may be determined by similar neural mechanisms, related to internal timing mechanism. Personal tapping tempo (PTT) can be considered as a promising measure of such “internal clock” properties, as it refl ects spontaneous tempo in human motor activity. As the existing studies do not provide detailed description of temporal characteristics of PTT, conclusions on temporal control underling timing and intelligence are still not clear. The present study investigated in 55 highly intelligent and 50 average intelligent students dynamical properties of temporal control of repetitive fi nger movements in PTT. Nonlinear elements for reconstruction of dynamical properties of PTT were performed. We found fractal properties of tapping performance. Additionally, advanced mathematical analyzes showed grouping in frequencies of PTT, which constituted characteristic optima of subjects’ performance. In these optima intelligence-related differences were revealed. These fi ndings supported the notion that ’internal clock system’ in the brain could be fractal in its nature which has a different structure in highly and average intelligent individuals. The study was supported by Grant N N106 109636 from Ministry of National Education and Science.
- Faculty of Fine Arts, Nicolaus Copernicus University, Torun, Poland
- Department of Neurophysiology, Nencki Institute of Experimental Biology Polish Academy of Sciences, Warsaw, Poland
- Department of Informatics, Nicolaus Copernicus University, Torun, Poland