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In turn, full mediation occurs if the direct effect of X on Y is no longer significant with a significant indirect effect. More specifically, partial mediation exists if the direct effect of X on Y remains significant with a significant indirect effect. The mediation exists if there is a significant indirect effect (a1b1). The total effect can also be estimated by the direct effect of X on Y when no mediator is included in the regression. The direct and indirect effect of X on Y sum to yield the total effect of X on Y (c1), meaning that c1 = c’1 + a1b1. While the direct effect of X on Y is estimated with c’1, the indirect effect of X on Y through M is estimated as a1b1, meaning the product of the effect of X on M (a1) and the effect of M on Y controlling for X (b1). In Model 4, X is modeled to influence Y directly as well as indirectly through a single mediator variable M causally located between X and Y (Hayes, 2012). Since there are two dependent variables in my thesis, the mediation analyses are performed twice separately (once for NPD Effectiveness and once for NPD Efficiency).įigure 2. The PROCESS plugin is developed by Hayes (2012) and is freely available. The analyses are conducted with Model 4 (Figure 2) in PROCESS plugin in SPSS. Hypothesis 2e: NPD Process mediates the relationship between IT Capability and NPD E fficiency. Hypothesis 2d: NPD Process mediates the relationship between IT Capability and NPD Effectiveness. Hypothesis 2c: A higher level of NPD Process leads to a higher level of NPD Efficiency. Hypothesis 2b: A higher level of NPD Process leads to a higher level of NPD Effectiveness. Hypothesis 2a: A higher level of IT Capability leads to a higher level of NPD Process.
Hypothesis 1b: A higher level of IT Capability leads to a higher level of NPD Efficiency. Hypothesis 1a: A higher level of IT Capability leads to a higher level of NPD Effectiveness. Accordingly, the hypotheses are formulated as follows: Depicted from the operational conceptual model, NPD Performance is measured by two distinct sub-constructs (NPD Effectiveness and NPD Efficiency).
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