TABLE 2.

Spearman’s rank correlation coefficients between the participant’s attributes and the perceived workload demands. Attributes are indicated by the initial letter: (Y) = years of customer service experience, (E) = extraversion, (A) = agreeableness, (O) = openness to experience, (C) = conscientiousness, and (N) = neuroticism. The columns are the NASA-TLX demands, and OWW is an abbreviation for the overall weighted workload. * indicates a significant correlation in p < .05.

Robot condition
Attribute		Mental	Physical		Temporal	Performance	Effort	Flustration	OWW
(Y)		0.2263	−0.3034		0.1835	−0.5644	−0.0917	−0.7523*	−0.7646*
(E)		−0.1371	−0.0442		0.4425	−0.1876	−0.4301	−0.3864	−0.6981*
(A)		−0.6050	−0.0750		−0.0062	0.3685	0.4877	−0.2531	0.0062
(O)		−0.0432	−0.1188		0.0432	0.2384	0.0741	−0.4075	−0.1605
(C)		−0.2920	−0.2453		0.1056	0.2867	0.0062	0.0683	−0.1678
(N)		0.2805	−0.0247		−0.1220	0.0061	0.1402	0.0976	0.6037

Local condition
Attribute		Mental	Physical		Temporal	Performance	Effort	Flustration	OWW
(Y)		0.0123	−0.2699		−0.4282	−0.2447	−0.3466	−0.3731	−0.4404
(E)		0.1250	−0.2470		−0.5859	−0.1122	−0.4001	−0.2618	−0.4550
(A)		0.2601	−0.5666		−0.5865	0.2902	−0.0836	−0.4322	−0.2284
(O)		0.3468	−0.1765		−0.5248	0.3025	0.1579	−0.3210	0.0000
(C)		0.3988	0.0748		−0.5157	0.1056	0.1246	−0.1678	−0.0932
(N)		−0.0336	0.4312		0.4756	0.0244	0.7187*	0.3720	0.4939