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通过设置对照实验,既可排除无关变量的影响,又可增加实验结果的可信度和说服力。通常情况下,实验需要设置实验组和对照组。实验组是指接受实验变量处理的对象组;对照组也称控制组,是不接受实验变量处理的对象组,而实验组和对照组中变量的具体控制,即实验分组,是实验设计的重要环节,分组是否合理,关系到实验结果判断的准确性和结论的可靠性。1依据实验变量分组依据实验变量进行分组,通常将实验对象分成2组或多组,其他条件相同且适宜后,再给予不同的实
By setting up a control experiment, we can not only exclude the influence of unrelated variables, but also increase the credibility and persuasion of experimental results. Under normal circumstances, the experiment needs to set up experimental group and control group. The experimental group refers to the subject group that receives the experimental variables; the control group, also known as the control group, is the subject group that does not accept the experimental variables; and the specific control of the variables in the experimental group and the control group, that is, the experimental grouping, is important for the experimental design Links, grouping is reasonable, related to the accuracy of the experimental results to determine the reliability and conclusions. 1 grouping according to experimental variables based on experimental variables grouping, the subjects are usually divided into two or more groups, the other conditions are the same and appropriate, and then give different real