Lab 3 Bimanual Coordination PDF

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Lab report of lab 3 including graphs, Lab report of lab 3 including graphs...

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KIN 315 Motor Learning Lab section : Tuesday 11:00 ~ 12:30 Name: Bimanual Coordination Lab 3 Report Purpose : The Purpose of this experiment was to see the influence on coordination when tasks are given to both hands by drawing circles or lines. In this lab 3, we investigated which is more difficult between asymmetric bimanual coordination (draw a line with one hand while draw a circle with other hand) and symmetric bimanual coordination (both hands draw same tasks such as circle and circle or line and line). According to Motor Learning and Control, “Its inherent preference for controlling limb movements; it prefers symmetry (Magill, 153). For this reason, two limbs prefer to do the same task at the same time. This preference helps the performance of symmetric bimanual skills, but can lead to problems for asymmetric skills.(Magill, 153). Hypothesis: ● As the speed increases, the Index of Circularity will be farther away from 0 when drawing lines, and will be farther away from 1 when drawing circles. ● Regardless of the speed, both hands having same task(symmetric bimanual coordination) will give a better Index of Circularity than doing 2 different tasks(asymmetric bimanual coordination) such as circle and line. Results: Talking about our group’s data, the graphs basically indicates the change in index of circularity according to the change in speed of the motion. If we compared the chart and graph between 1Hz and 2Hz, the index of circularity is closer to 1 when drawing circle to with speed of 1Hz than with the speed of 2Hz. The index of circularity is closer to 0 when drawing a line with a speed of 1Hz than a speed of 2Hz. In our data, 2Hz LL ‘Prefered hand’ has better results than 1Hz LL ‘Prefered hand’. Except for this, all of our data supported our hypothesis in regard to relationship between speed and task difficulty. However, the class chart showed that CC both hands,CL ‘Prefered hand’ and LC ‘Non-prefered hand’ did not support our hypothesis. Our second hypothesis, which both hands doing the same task will give the better index of circularity than doing two different tasks for each hand, was supported by the data. If we look at the tables, we can notice that both hands doing same tasks( circle/circle and line/line) are relatively closer to the Index of Circularity than doing two different tasks. In our whole class data, we can observe the same results. Symmetric bimanual coordination has a better Index of Circularity than doing Asymmetric bimanual coordination.

Class data graph: The class data supports our hypothesis in that as you can see as the speed increased the IC is farther away from 0 when drawing lines and farther away from 1 when

drawing circles. The graph is a task vs. IC graph. Task is the vertical and IC is the horizontal. The left graph is for 1 hertz and the right is for 2 hertz

Task Vs. IC

IC

Group Data Graph: The graph portrays that the easiest task was drawing a line with both hands at 1 hertz. It also shows that the hardest task was drawing a circle with the NP and a line with the PH at 2 hertz. This data graph supports our hypothesis. Chart:

Group Data Chart : Both the class chart and our groups chart shows that the easier tasks were CC and LL. 1 Hz had better IC’s compared to 2 Hz, because it is easier to perform simultaneous task at a slower pace. For the class the hardest task was drawing a line with your NH and a circle with your PH in both 1 and 2 Hz. For our group the hardest task was also LC with IC’s further away from their goal of 1 or 0 compared with CL. Discussion Questions: 1. Which conditions were the easiest and hardest to perform? The IC’s of the circles drew along with lines were lower in comparison to circles drew by both hands regardless of the frequency. The IC’s of the lines drew along with circles were also lower in comparison to lines drew by both hands regardless of frequency. This shows us that it’s

easier to perform the same action with both hands. Line, Line at 1 hertz was the easiest and circle (NP), line (PH) at two hertz was the hardest. 2. What was the effect of speed on the data? We found that throughout the trials the speed of 1 hertz always had results closer to the goal number (0 for the lines and 1 for the circles) In other words, speed had a negative effect on the accuracy of the task we were performing. Higher speed resulted in further distances away from the target. This was also true for the class data results Real World Example: ● A real world example regarding the use of bimanual coordination could be dribbling two basketballs at once. With this being said, we have a preferred and a non-preferred hand so more than likely there will be a difference in coordination when dribbling. ● The use of standard cars utilizes the concept of bimanual coordination. You are moving the steering wheel in a circular motion with one hand and the driving stick with the other.

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