Construct DTPB model by using DEMATEL: a study of a university library website

Abstract

Purpose -Traditional studies on a decomposed theory of planned behavior (DTPB) analyze the relationship of variables through a structural equation model. If certain variables do not fully comply with the independent hypothesis, it is not possible to conduct proper analysis, which leads to false conclusions. To solve these problems, the aim of this research is to adopt an expert opinion-driven decision making trial and evaluation laboratory (DEMATEL), and re-establish the causal relationship and the degree of interrelationship of DTPB variables. Design/methodology/approach -This research used a university library website as an individual case, and illustrated the benefits of constructing DTPB model by using DEMATEL through the opinions of 23 experts surveyed by questionnaires. Findings -According to the analysis result of constructing DTPB model by using DEMATEL, when DTPB variables were distributed within quadrants of high centrality and degree of causality, they became the key influential variables; when distributed within quadrants of low centrality and degree of causality, the variables needed urgent management. Originality/value -When traditional DTPB does not consider the direct and indirect relationships among variables, the original causal relationship of variables will be influenced, and then the original variables cannot fully demonstrate their causal relationship. Therefore the feasibility and effect of constructing DTPB model by using DEMATEL proposed in this research are proved through individual cases.

A TOE Approach to Establish a Green Supply Chain Adoption Decision Model in the Semiconductor Industry

“…Unlike the traditional statistical approaches that explore cause-and-effect relationship among variables normally require a minimum sample size of 200 to provide sufficient statistical strength for data analysis [117], the expert opinion-driven MCDM approaches, such as DEMATEL, require only a minimum sample size of six [118,119]. In most studies using the DEMATEL method, the average sample size ranged between 10-15 experts [115,118,[120][121][122].…”

Rebuilding DEMATEL threshold value: an example of a food and beverage information system

“…However, accurate analysis was difficult because incorrect conclusions were often caused by some variables that did not satisfy the assumption of independence. To solve this, Lee et al ( 2013 ) employed the expert-opinion-oriented DEMATEL to reestablish the causal relationships between DTPB variables and their mutual influences. Despite the efforts to reestablish the causal relationships between DTPB variables and their mutual influences using the DEMATEL method, this method was dependent on expert opinions regarding the degrees of influence between elements.…”

“…Some researchers use various methods to set up the threshold value, whereas some ignore explanations about the threshold value setting (Li and Tzeng 2009 ; Hu et al 2011 ; Lee et al 2013 ). However, an overly high threshold value inappropriately reduces the significance of expert opinions and oversimplifies the problem, whereas an exceedingly low threshold value results in divergent opinions and a lack of focus.…”

Identification and evaluation of landfill site selection criteria using a hybrid Fuzzy Delphi, Fuzzy AHP and DEMATEL based approach

“…DEMATEL has the ability not only to demonstrate directed relationships of sub-systems, but also to clarify the degree of interactions between sub-systems (Wu 2012). DEMATEL aims to obtain direct and indirect causation and the strength of influence across quality features by applying matrix computation to complex systems, and comparing the interrelations among the quality features (Lee et al 2013). Thus, it provides an effective way to handle the inner dependences within a set of criteria.…”