我是用stata做的因子分析,问卷题目是13个,样本量1000多个,是用的一机构已有的问卷和数据结果。
现在因子个数问题严重困扰我了, 大于1 的特征值个数最初是1个,3.04,但是旋转之后变成了2个,都是1点多,我的相关理论支撑的是两个因子,另外这里面还有两个个问题,一是uniqueness都很高,二是在选择变量归哪个因子时是否可以将loading都很小的变量或者意义存在重叠的变量进行删除再重新做因子分析呢
下面分别是旋转前后的factor loading table和碎石图,请高手指点
| 旋转前 | | | | | | |
| Variable | Factor 2 | Factor 2 | Factor 3 | Factor 4 | Factor 5 | Uniqueness |
| y01 | 0.521 | -0.253 | -0.109 | -0.046 | 0.013 | 0.650 |
| y02 | 0.572 | -0.305 | -0.036 | -0.074 | 0.027 | 0.572 |
| y03 | 0.419 | -0.227 | 0.014 | 0.053 | 0.000 | 0.770 |
| y04 | 0.519 | -0.212 | -0.089 | -0.064 | 0.055 | 0.670 |
| y05 | 0.476 | -0.133 | -0.148 | -0.056 | -0.049 | 0.729 |
| y06 | 0.525 | -0.200 | 0.008 | 0.089 | -0.060 | 0.672 |
| y07 | 0.484 | -0.019 | 0.024 | 0.170 | -0.032 | 0.735 |
| y08 | 0.551 | 0.421 | -0.202 | 0.035 | 0.016 | 0.476 |
| y09 | 0.527 | 0.438 | -0.195 | -0.034 | -0.013 | 0.491 |
| y10 | 0.393 | 0.259 | 0.167 | -0.133 | -0.013 | 0.733 |
| y11 | 0.520 | 0.116 | 0.284 | -0.016 | -0.008 | 0.635 |
| y12 | 0.541 | 0.056 | 0.273 | -0.046 | 0.005 | 0.628 |
| y13 | 0.348 | 0.098 | 0.074 | 0.171 | 0.067 | 0.830 |
| 旋转后 | | | | | | |
| Variable | Factor 2 | Factor 2 | Factor 3 | Factor 4 | Factor 5 | Uniqueness |
| y01 | 0.562 | 0.156 | 0.097 | 0.026 | -0.001 | 0.650 |
| y02 | 0.618 | 0.118 | 0.178 | 0.015 | -0.014 | 0.572 |
| y03 | 0.433 | 0.067 | 0.152 | 0.121 | 0.004 | 0.770 |
| y04 | 0.531 | 0.177 | 0.121 | 0.007 | -0.044 | 0.670 |
| y05 | 0.458 | 0.233 | 0.064 | 0.003 | 0.060 | 0.729 |
| y06 | 0.485 | 0.149 | 0.193 | 0.171 | 0.063 | 0.672 |
| y07 | 0.322 | 0.250 | 0.205 | 0.236 | 0.028 | 0.735 |
| y08 | 0.141 | 0.696 | 0.121 | 0.065 | -0.015 | 0.476 |
| y09 | 0.118 | 0.691 | 0.129 | -0.005 | 0.016 | 0.491 |
| y10 | 0.071 | 0.340 | 0.374 | -0.078 | 0.012 | 0.733 |
| y11 | 0.215 | 0.263 | 0.494 | 0.072 | 0.003 | 0.635 |
| y12 | 0.275 | 0.235 | 0.489 | 0.048 | -0.007 | 0.628 |
| y13 | 0.140 | 0.238 | 0.207 | 0.213 | -0.075 | 0.830 |