3.3 Hypothesis Test and empirical analysis results
(1) Based on the interval number expansion DEMATEL method, this study firstly deals with the complexity, fuzzy and uncertain factors in the range of interval numbers, and according to the numerical size of the center degree and the reason degree of each variable to determine the ordering result of the influence degree of the independent variables (influence factor) on the target variable (dependent variable) in order to determine the direction and degree of action of each variable (influence factor) on the dependent variable. The relationship among the four variables of simmelian ties, high performance work practice system, knowledge fermenting and knowledge spiralin the theoretical framework is transferred from the perspective of centrality and causality. This study determines the direction and degree of interaction among independent variables (influence factors) and dependent variables, and distinguishes the key cause variables and result variables. The study determines the causal relationships between simmelian ties and high performance work practice system, the causal relationships between high performance work practice system and knowledge fermenting, and the causal relationships between knowledge fermenting and knowledge spiral, then the four variables in the theoretical framework of the mechanism of action are determined. The centrality variable, the cause variable, and the result variable belong to the four variables.
The interval number DEMATEL method follows the following steps (Jinweijian,Huhanhui, 2011; Gaopeiran,Luxinyuan, 2014;Jiangqian etc., 2016):
Step one, constructing interval number matrix.