What is in the Corn Judge's Mind?1
What is in the Corn Judge's Mind?1
复制标题
玉米法官心里在想什么？1
DOI：
10.2134/agronj1923.00021962001500070006x
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发表时间：
1923
期刊：
影响因子：
2.1
通讯作者：
H. Wallace
中科院分区：
文献类型：
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作者：
H. Wallace
1916年春，H. D.爱荷华州实验站的休斯请一些有经验的玉米鉴定员根据他们认为的相对产量对大约500个玉米穗进行评分。这五百个玉米穗都是在田间种植的，长的只有三四英寸，长的有十几英寸。品种是里德的大学菌株。除了评分外，还对每只耳朵进行了完整的测量。除其他事项外，还确定了穗的长度和周长，籽粒的重量，在顶端（籽粒的顶端，而不是穗的顶端）的籽粒的填充，籽粒的起泡和淀粉质。这些穗被种植，一穗一行，并在1916年秋天，产量得到保证。这个实验在1917年重复了一次。相关系数的方法非常适合于解释这类数据，以发现一个有经验的玉米法官的想法。结果表明：穗长.7、周长.4、籽粒重.5、籽粒尖部饱满度.4、籽粒无鼓泡.2、无淀粉质.3、籽粒粗度.4、籽粒粗度.5、籽粒粗度.7、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.5、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度.4、籽粒粗度.4、籽粒粗度.4、籽粒粗度.2、籽粒粗度...当这些结果被获得时，它被决定制造出真正存在于法官头脑中的记分卡。所用的方法是1921年1月3日出版的《农业研究杂志》中由休厄尔·赖特撰写的文章“相关性和因果关系”中描述的通径系数方法。在使用该方法时，不仅需要有裁判员的评分与穗和仁的各种特性之间的相关系数，而且还需要有各种特性之间的相关性。长度和周长之间的相关性为0.3，籽粒长度和重量之间的相关性为0.3，籽粒长度和顶端充实度之间的相关性为0.2，长度和无起泡之间的相关性为0.2，籽粒长度和顶端充实度之间的相关性为0.3，籽粒长度和顶端充实度之间的相关性为0.2，籽粒长度和无起泡之间的相关性为0.3，籽粒长度和顶端充实度之间的相关性为0.2，籽粒长度和无起泡之间的相关性为0.3
In the spring of 1916, Prof. H.D. Hughes, of the Iowa Experiment Station, asked a number of experienced corn judges to score some five hundred ears of corn on the basis of what they thought the relative yields would be. These five hundred ears of corn were field run, varying from only three or four inches in length to more than ten inches. The variety was the college strain of Reid. In addition to the scoring, complete measurements were taken of each ear. Among other things, there were determined the length and circumference of ear, weight of kernel, filling of the kernel at the tip (tip of kernel, not tip of ear), blistering of kernel, and starchiness. These ears were planted, an ear to a row, and in the fall of 1916, yields were secured. The experiment was repeated in 1917. The method of correlation coefficients is admirably adapted to interpreting data of this sort to discover just what is in an experienced corn judge’s mind. It was found that the typical judge’s score was correlated with various factors as follows: length of ear .7, circumference .4, weight of kernel .5, filling of kernel at tip .4, absence of blistering of kernel .2, absence of starchiness .3. When these results were obtained, it was determined to make out the score card which really existed in the judges’ minds. The method used was the method of path coefficients as described in the January 3, 1921, issue of the Journal of Agricultural Research in the article “Correlation and Causation” by Sewall Wright. In using this method, it is necessary to have not only the correlation coefficients between the judge’s score and the various ear and kernel characteristics, but also the inter-correlations between the various characteristics. The correlation between length and circumference was found to be .3, between length and weight of kernel .3, between length and filling of kernel at tip .2, between length and absence of blistering, .2, between