As shown in figure1to figure5, When tester touches the skin of participants, the skin on finger is more sensible compared to skin on other parts, which maybe mean that finger and cheek has more relevance with brain.And the distance between two points people can feel ranging from 2.0—3.9. As you know, when brain of people suffers from some damage,some function of body may lose to varying degrees.From the experiment, we may have an assumption that , the function of finger is influenced most by the brain. Besides, we have verified control variables of gender and age. In the table2 and table 3, both number of sig is higher than 0.05.Therefore, we can conclude that variables of gender and age have no relevance with threshold in a significant level of 0.05. The experiment has devoted some data for me, and I also conclude some conclusions. The standard deviation of finger group, forearm group and forehead group are both low, which means the reliability of the data of the three group is higher than the others. The data of finger group is a good proof that finger has the highest sensitivity among the five parts of skin, which further explains some part of brain controlling the sense of skin involves more in finger’s movements. But whether the experiment is efficiently measuring the relevance between brain and different parts of skin still need our more attention, and we have to improve our method of measuring. As far as I can see, to enhance the reliability and validity, except for increasing the standard of measuring threshold, we can rely on increasing the number of sample, introducing more control variable and decreasing the incremental distance between two point as well as increasing the frequency of testing procedure. As for control variables, I have excluded gender and age.In my opinion, we can introduce variables of physical condition and psychologic status into experiment, which may have great influence on the results. As for age, we must considerate that the participants in the experiment are of similar age.And due to the similar age, the result we have concluded may be incorrect. Besides, the sex ratio of the participants in the sample is too lopsided. And due to the small sample we based, the conclusion that gender has no relevance with threshold is not so convictive. Therefore, in the following experiment, size of sample, the control variable and age as well as the condition of participants should be taken great attention. Martin, Carlson, and Buskist(2017) think the three regions of primary sensory cortex in each hemisphere receive information from the opposite side of the body（P124). From the experiment, we can see that different part of skin have different sensitivity, but we can not obtain more tight relevance between body and brain. To test the connection between body and brain further, we may test the different sensitivity between left arm and right arm as well as left cheek and right cheek, or touching different part of skin at the same time. What’s more, we can set interference factor when we do research, we can let participants listening wonderful music or smelling the perfume while we are touching his/her skin.If a mean of somewhere of body is lower than other parts, it shows that brain has very tight relevance with the part of skin. Martin, Carlson, and Buskist (2017) think that sensitivity to subtle difference in touch and pressure varies widely across the surface of the body (P179). But what is the most subtle difference touch our different part of skin can detect. We can use different level of strength to touch different part of skin until we can not notice the touch in our skin to measure the sensitivity of different part of skin. What I have expounded is not full, we can develop more efficient and scientific method of measurement to measure sensory threshold and the relevance between different part of body 网站原创范文除特殊说明外一切图文作品权归所有；未经官方授权谢绝任何用途转载或刊发于媒体。，、更多范文欢迎访问我们主页 当然有需求可以和我们 联系交流。[-Z] |
