## 2 Literature Review
### The Effect of Extended Unified Theory of Acceptance and Use of Technology on Attitude  
The following theoretical and empirical evidence of the connection between the extended UTAUT and attitude serve as the basis for the proposed hypotheses of this study. Attitude has been consistently studied in the field of technology-based products, such as artificial intelligence, e-banking, fintech, and robotic restaurants [30; 31; 32; 33]. Attitude refers to \"the degree that a person has a favorable or unfavorable evaluation or appraisal of a behavior\" [34] (p. 188). In other words, attitude indicates whether a person positively or negatively assesses a particular behavior, so it is an important factor regarding the establishment of his/her behavioral intentions [35; 36]. First, this study proposed the effect of performance expectancy on attitude. According to the expectancy theory of motivation [37], an individual's attitude is determined by performance, which can give the most beneficial outcome to him/her. This means that if golfers are convinced that robotic caddies can perform well during their game, they would develop a favorable attitude regarding it. There are also empirical shreds of evidence supporting the argument. [PERSON] et al. [38] studied consumers' e-ticketing behavior by applying the extended UTAUT. Their findings indicate that consumers tend to adopt a positive attitude when they expect a high level of performance. [PERSON] et al. [39] also found the positive impact of the performance expectancy of privacy by design on individuals' favorable attitudes. Based on the discussions above, the current study established the hypothesis as below. **Hypothesis 1 (H1). **_Performance expectancy has a positive effect on attitude._Second, this study hypothesized the association between effort expectancy and attitude. The TAM theory suggests how easily consumers learn about a new technology influences their attitude [12]. Thus, it can be inferred that golfers will have a good attitude towards robotic caddies if using them seems to be easy. In addition, the prior research empirically found that effort expectancy significantly affects attitude. As an example, [PERSON] et al. [10] utilized the extended UTAUT in the context of information technology and information systems. Their findings indicated that effort expectancy has a significant effect on attitude. [PERSON] et al. [40] also assessed the effect of effort expectancy in the context of mobile payments, and they showed that attitude is significantly affected by effort expectancy. Therefore, the following hypothesis of the current study was developed. **Hypothesis 2 (H2). **_Effort expectancy has a positive effect on attitude._  
Third, the association between social influence and attitude was also examined in this study. According to the TPB [34], individuals tend to engage in a particular behavior under social pressure, which suggests that if people around them think they should use a robotic golf caddy, they will have a favorable attitude. The argument was also supported by empirical research. [PERSON] et al. [41] applied the extended UTAUT to the field of telemedicine, which is defined as the delivery of healthcare services remotely using telecommunication technologies. They disclosed that when people recognize a high level of social influence, they are more likely to have a good attitude. [PERSON] [42] more recently suggested that social influence significantly impacts attitude in the context of mobile payments. This study proposes a correlation between social influence and attitude, according to theoretical and empirical backgrounds. **Hypothesis 3 (H3). **_Social influence has a positive effect on attitude._  
The fourth hypothesis of this study proposes a relationship between facilitating conditions and attitude. The TPB suggests that individuals have the confidence that they can take any action when their abilities are supported [34].