# A Predictive Model on the Intention to Accept Taekwondo Electronic Protection Devices
## 2 Literature Review  
[PERSON] [17] developed the theory of TAM to predict and explain the behavior of information technology (IT) users. In other words, TAM is a significant information systems theory that is relevant to the acceptance and use of IT [18; 19; 20]. TAM is based on the theory of reasoned action (TRA) [21] and the theory of planned behavior (TPB) [22]. These theories are representative behavioral intention models that predict behavior through attitude. TAM is an adaptation of the TRA by [PERSON] and [PERSON] [21]. It was designed for modeling user acceptance of IT [23]. Furthermore, TPB expands TRA by adding subjective norms and perceived behavior control variables; however, these were excluded from TAM [24]. Assessing changing attitudes and behavioral intentions is common among TAM, TRA, and TPB. Nevertheless, TAM differs from the other two theories as it examines perceived usefulness and perceived ease as factors that explain the difference in the degree of acceptance of technology and innovation. It is believed that these factors influence attitudes.  
TAM can predict users' behavioral intention and actual behavior by examining the relationship between perceived ease of use (PEU), perceived usefulness (PU), attitude toward using, and behavioral intention to use (BI) [17]. This model hypothesizes that system use is directly determined by BI, which in turn is influenced by users' AT, the system, and the system's PU [25]. It is important to emphasize that while TPB is a general theory, designed to explain almost any human behavior [26], TAM exclusively focuses on the use of technological innovations and is appropriate for analyzing this type of behavior [17; 27]. This theory states that PEU and PU significantly influence the acceptance to use a technology [28]. [PERSON] et al. [23] have stated that various external variables, other than the abovementioned, can also influence the acceptance of a technology. Consequently, this study extends the TAM by including perceived quality, visual attractiveness, wearability, and functionality as factors that influence the use of a technology.  
In an attempt to expand TAM, a recent study applied structural equation modeling (SEM) to improve the understanding of the use of wearable technology [29]. Therefore, the hypotheses and research model (Figure 1) established in this study are as follows.  
**Hypothesis 1**.: _The perceived quality of Taekwondo electronic protector devices significantly influences perceived ease of use and perceived usefulness._  
**Hypothesis 3.**_The wearability of Taekwondo electronic protector devices significantly influences perceived ease of use and perceived usefulness._  
**Hypothesis 4.**_The functionality of Taekwondo electronic protector devices significantly influences perceived ease of use and perceived usefulness._  
**Hypothesis 5.**_The perceived ease of use of Taekwondo electronic protector devices significantly influences perceived usefulness and acceptance intention._  
**Hypothesis 6.**_The perceived usefulness of Taekwondo electronic protector devices significantly influences acceptance intention._