When spss does statistical analysis, some dimensions are related but the total score is irrelevant. In the psychological scale, all dimensions are replaced by average scores. Only one dimension is the total score and several dimensions are the average scores of each dimension.

Mathematician Hausdorf put forward the concept of continuous space in 19 19, that is, the dimension of space can change continuously, and it can be an integer or a fraction, which is called Hausdorff dimension.