TY  - JOUR
PY  - 2009//
TI  - Aging, time scales, and sensorimotor variability
JO  - Psychology and aging
A1  - Newell, Karl M.
A1  - Mayer-Kress, Gottfried
A1  - Liu, Yeou-Teh
SP  - 809
EP  - 818
VL  - 24
IS  - 4
N2  - It is well established that there is an increased amount of intra-individual variability with aging in a variety of behavioral contexts. Here, we elaborate from a self-organization and dynamic systems framework to investigate the relevant time scales of variability as a function of aging and their relation to the changes in the amount and structure (frequency and time domains) of movement and postural variability. In particular, we examine evidence for the general hypotheses that (a) there is a reduction or even loss of shorter time scales in the control of movement with aging and (b) the shorter the time scale in motor output variability, the more sensitive the measure is as a biomarker to revealing the onset and early influence of aging and disease. The dynamic analysis of the time scales of variability distinguishes the distinctive roles of stability and noise in the increased amount of intra-individual variability with aging.<p />  <p>Language: en</p>
LA  - en
SN  - 0882-7974
UR  - http://dx.doi.org/10.1037/a0017911
ID  - ref1
ER  -