Table 4.

ANCOVA models results for four-way interaction between T/V Distinction, language, gender, and age per outcome variable.

Theme	Dependent variable	F	p	${\eta }_p^2$
Sociability	Social presence	8.447	0.004	0.031
	Conversational enjoyment	5.769	0.017	0.021
CA-User Collaboration	Conversational agent trust	4.667	0.032	0.017
	Privacy concern	2.421	0.120	0.009
	Perceived privacy protection	6.731	0.010	0.024
	Co-production	7.997	0.005	0.029
Service Evaluation	Perceived ease of use	0.710	0.400	0.003
	Perceived usefulness	12.480	0.000	0.044
	Service satisfaction	4.728	0.031	0.017
Behavioral Intentions	Intended usage	9.295	0.003	0.034
	Net Promoter score	10.923	0.001	0.039

Significant values at p < 0.05 are in boldface. Only four-way interaction results are displayed.