Naslov
Dynamics of two psychomotor activities: nonlinear aspects

Autori
Proroković, Ana ; Gregov, Ljiljana

Izvornik
Review of psychology (1330-6812) 11 (2004), 1-2; 35-44

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nonlinear dynamics; psychomotor activity; dimensionality; predictability

Sažetak
The aim of this study was to find out whether series of complex reaction time (CRT) and tapping intervals (TI) contain nonlinear dynamic structure in different performance situations. Seven female subjects, aged between 19-25 participated in an 2x2 within groups factor experiment, which included two levels of CRT task difficulty, and tapping task. The tasks were performed as single tasks, and simultaneously as a dual task. Analysis of CRT series and TI time series included calculation of various nonlinear parameters (correlation dimension, largest Lypunov exponent), as well as an application of quantitative recurrence analysis (%determinism, divergence) and the surrogate data technique, for testing nonlinearity. The results indicated the existence of chaotic dynamics in human response time, as well as in tapping data. Generally speaking, it seems that increased task requirements caused a reduction in the dimensionality of underlying system dynamics. It was also found that one of the nonlinear properties of the CRT series and TI time series was their sensitive dependence on initial conditions, which was more obvious in more complex tasks.

Izvorni jezik
Engleski

Znanstvena područja
Psihologija

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