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Titolo:
Variability and noise in continuous force production
Autore:
Slifkin, AB; Newell, KM;
Indirizzi:
Penn State Univ, University Pk, PA 16802 USA Penn State Univ University Pk PA USA 16802 v, University Pk, PA 16802 USA
Titolo Testata:
JOURNAL OF MOTOR BEHAVIOR
fascicolo: 2, volume: 32, anno: 2000,
pagine: 141 - 150
SICI:
0022-2895(200006)32:2<141:VANICF>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN MOTOR UNITS; CONTRACTIONS; COMPLEXITY; BEHAVIOR;
Keywords:
force; information; noise; variability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Slifkin, AB CNRS, CP 910,163 Ave Luminy, F-13288 Marseille 09, France CNRSCP 910,163 Ave Luminy Marseille France 09 lle 09, France
Citazione:
A.B. Slifkin e K.M. Newell, "Variability and noise in continuous force production", J MOTOR BEH, 32(2), 2000, pp. 141-150

Abstract

In the present 3 experiments, the authors examined the hypothesis, derivedfrom information theory, that increases in the variability of motor responses result from increases in perceptual-motor noise. Three different groupsof participants (Ns = 10, 9, and 10, respectively in Experiments 1, 2, and3) produced continuous isometric force under either low, intermediate, or high target force levels. When considered together, the results showed thatforce variability (SD) increased exponentially as a function of force level. However, an index of information transmission (M/SD), as well as measures of noise in both the time (approximate entropy) and the frequency (power spectrum) domains, changed according to an inverted-U-shaped function over the range of force levels. The findings provide further evidence that increased information transmission is related to increases, and not to decreases, in the noisiness of the structure of force output.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 22:30:17