| Number | 553 |
|---|
| Year | 1986 |
|---|
| Drawer | 10 |
|---|
| Entry Date | 11/17/1999 |
|---|
| Authors | Turvey, M. T., Rosenblum, L. D., Schmidt, R. C. & Kugler, P. N. |
|---|
| Contact | |
|---|
| Publication | Journal of Experimental Psychology: Human Perception and Performance, Vol. 12, No. 4, 564-583. |
|---|
| url |
|
|---|
| Abstract | Investigated the assertion that pendular, clocking movements typify mammalian terrestrial locomotion, using a procedure in which people swing hand-held pendulums at the wrists, comfortably and rhythmically. Previous work by P. N. Kugler and the 2nd author (1986) suggests that the periodic timing and powering of rhythmic movements in the comfort state follow from different laws. One law guides the assembling of the reference frame for clocking. Another law guides the assembling of the muscular, escapement processes determining the cycle energy. Pendular, clocking behavior was examined in 4 adult males for in-phase and out-of-phase coordinations. A. M. Wing and A. B. Kristofferson's (see PA, Vol 51:8195) method for parsing periodic-timing variance into independent clock and motor sources was applied. Results show that mean periodicity was unaffected by phase. Clock fluctuations, however, were larger out of phase than in phase. Motor fluctuations were indifferent to phase but reflected the departures of individual wrist-pendulum systems from their preferred periods. It is suggested that an intended phase relation is realized as a constraint on clock states. These states are more stable under the in-phase constraint than under the out-of-phase constraint. |
|---|
| Notes | |
|---|
