How Influential Are Mental Models on Interaction Performance? Exploring the Gap between Users’ and Designers’ Mental Models through a New Quantitative Method

Table 4

Mediation analysis of the directional similarity as mediator of the relationship between simplicity of information structure and task completion time.

	Point estimate	SE			Indirect effect	SE
Mod 1					1.71	0.69	2.47	92
Intercept	13.85	1.77	7.82
Pred	1.77	0.83	2.15
Mod 2
Intercept	11.86	1.88	6.31
Pred	0.07	1.04	0.07
Med	7.11	2.74	2.60
Mod 3
Intercept	0.28	0.07	4.00
Pred	0.24	0.03	8.00

Note. Med refers to mediator. Pred refers to independent variable.