Table 1.

Questionnaire items related to the research model constructs.

Variables and items		Questionnaire items	Sources
PEa,b
	PE1	I find the automated contouring system useful in my job.c I think the automated contouring system will be useful in my job.d	Venkatesh et al [23] and Kijsanayotin et al [25]
	PE2	Using the automated contouring system enables me to accomplish tasks quicker.c I think using the automated contouring system will enable me to accomplish tasks quicker.d	Venkatesh et al [23] and Kijsanayotin et al [25]
	PE3	Using the automated contouring system increases my productivity.c I think using the automated contouring system will increase my productivity.d	Venkatesh et al [23] and Kijsanayotin et al [25]
	PE4	Using the automated contouring system improves the outcomes of my work.c I think using the automated contouring system will improve the outcomes of my work.d	Venkatesh et al [23] and Kijsanayotin et al [25]
EEa,e
	EE1	The automated contouring system is clear and understandable to me.c I think the automated contouring system will be clear and understandable to me.d	Venkatesh et al [23] and Kijsanayotin et al [25]
	EE2	It was easy for me to become skillful at using the automated contouring system.c I think it will be easy for me to become skillful at using the automated contouring system.d	Venkatesh et al [23] and Kijsanayotin et al [25]
	EE3	I find the automated contouring system easy to use.c I think the automated contouring system will be easy to use.d	Venkatesh et al [23] and Kijsanayotin et al [25]
	EE4	Learning to operate the automated contouring system is easy for me.c I think learning to operate the automated contouring system will be easy for me.d	Venkatesh et al [23] and Kijsanayotin et al [25]
SIa,f
	SI1	People (eg, colleagues and friends) who influence my behavior think that I should use the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	SI2	People who are important to me (eg, department heads, tutors, superiors, and hospital leaders) think that I should use the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	SI3	Social propaganda has been helpful in the use of the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	SI4	In general, my hospital and my department have supported the use of the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
FCa,g
	FC1	I have the resources (devices, support from colleagues, etc) necessary to use the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	FC2	I have the knowledge (the clinical and computer skills) necessary to use the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	FC3	Health and information technology personnel in the hospital are available to assist with system difficulties.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	FC4	I have adequate knowledge resources (eg, books, documents, and consultants) to help me learn about the automated contouring system.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
BIa,h
	BI1	I intend to use the automated contouring system in the next 2 months.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	BI2	I will use the automated contouring system in the next 2 months.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
	BI3	I plan to use the automated contouring system in the next 2 months.c,d	Venkatesh et al [23] and Kijsanayotin et al [25]
PRa,i
	PR1	There is a possibility of malfunction and performance failure, so the system might fail to deliver accurate contouring areas and could mislead my work with inaccurate contouring.c,d	Ye et al [10], Bhattacherjee and Hikmet [15], and Andrews et al [38]
	PR2	There is a probability that I need more time to fix the errors and nuances of the artificial intelligence system.c,d	Ye et al [10], Bhattacherjee and Hikmet [15], and Andrews et al [38]
	PR3	I think using the automated contouring system may cause psychological distress, as it could have a negative effect on my self-perception of the treatment plan.c,d	Ye et al [10], Bhattacherjee and Hikmet [15], and Andrews et al [38]
	PR4	I am concerned that my patients’ personal information and health details are/would be insecure and could be accessed by stakeholders or unauthorized persons, leading to lawsuits for physicians and the hospital.c,d	Ye et al [10], Bhattacherjee and Hikmet [15], and Andrews et al [38]
RBa,j
	RB1	I do not want the automated contouring system to change how I develop my treatment plan for manual contouring because the new system is unfamiliar to me.c,d	Bhattacherjee and Hikmet [15] and Dou et al [34]
	RB2	I do not want to use the automated contouring system because of past experience; these new high-tech products always fall flat during practical application.c,d	Bhattacherjee and Hikmet [15] and Dou et al [34]
	RB3	I do not want to use the automated contouring system because there is a possibility of losing my job, as artificial intelligence–assisted technology may do my work better than me.c,d	Raza et al [37]
UBk,l
	UB1	I have already used the automated contouring system.c I am preparing to use the automated contouring system.d	Venkatesh et al [23]
	UB2	I recommend that others should use the automated contouring system.c,d	Venkatesh et al [23]
	UB3	Have you ever overridden the contouring system after using it for some time?c Would you ever override the contouring system?b	Venkatesh et al [23]

^a7-point scale (1=strongly disagree; 2=quite disagree; 3=slightly disagree; 4=neither agree or disagree; 5=slightly agree; 6=quite agree; 7=strongly agree).

^bPE: performance expectancy.

^cQuestions for those who have already used the system.

^dQuestions for those who have not used the system.

^eEE: effort expectancy.

^fSI: social influence.

^gFC: facilitating conditions.

^hBI: behavioral intention.

ⁱPR: perceived risk.

^jRB: resistance bias.

^k2-point scale (1=yes; 2=no).

^lUB: use behavior.