Abstract :
Background: Coordination depends on online performance, and online feedback supports the successful coordination of individuals in joint implementations. Objective: A specific purpose for the research was investigating temporal and spatial parameters in interpersonal coordination. Methods: An applied research was done as a singlestage case study with 14 jumping rope elite boys (13-18 years). The subjects practiced the jumping rope tasks for 8 months so that they could do them properly and without online feedback. This study used a Vicon motion analysis device with six infrared cameras capable to record three-dimensional movements of the legs and rope whirling. Results: The results of oneway ANOVA showed that with enough practice, even in the absence of feedback, landing position (spatial parameter) and hand-foot time deviation, timing variation in rope whirling, and landing time (temporal parameter) of joint groups will reach an equal level while a significant difference was observed in jump height (spatial parameter) and movement time (temporal parameter) between individuals (P⋜0.05). Conclusions: So, increasing task difficulty, amount and sustainability of inter-personal coordination will increase. Increasing joint task demands, amount and sustainability of interpersonal coordination will increase, and joining individualchr s power will be changed according to individual and joint tasks constraints.
