## 2 Theoretical Background and Hypotheses  
### Technology Acceptance Model (TAM)  
The Technology Acceptance Model (TAM) was originally introduced by [PERSON] [7]. The TAM model was adopted from the Theory of Reasoned Action (TRA) [15] and has been proven to be successful in predicting and explaining human behavior. The TAM models consist of factors known as external variables, which can affect Perceived Usefulness (PU) and Perceived Ease of Use (PEOU) to determine the Attitude (ATT) of human behavior intention (BI) to the use of technology products.  
Perceived ease of use (PEOU) and perceived usefulness (PU) are the two key constructs of TAM. PEOU can be defined as a degree when a user feels there is no difficulty to use the technology, and PU can be defined as a psychological level that the user perceives how useful the technology would be [16]. Previous studies suggested that both PU and PEOU were influential antecedents that affect user's attitude (ATT) and behavioral intention (BI), which will lead to the actual use of technology [14]. Many researchers have applied TAM in their studies to explore users' willingness to accept new technology, such as online apparel shopping [17; 18]. Recently, TAM has become one of the most important theoretical models in the area of technological adaptation. [PERSON] concluded that the TAM constructs were important determinants of computer usage [10].  
[PERSON] and [PERSON] studied the e-learning system regarding attitude and intention to use, and found that both perceived ease of use and perceived usefulness were positively associated with attitude [19]. Moreover, attitude was positively associated with intention to use. [PERSON] and [PERSON] applied TAM and Innovative Features to explore the intention of using Nike+ Running apps and found that the app user's innovation characteristics, perceived usefulness, perceived ease of use, and the attitude toward using have remarkable forecast functions regarding the behavior intention to use [20]. [PERSON], [PERSON] and [PERSON]'s study on Wii Sports gaming users found that perceived usefulness has no significant impact on the attitude toward behavior [21]. [PERSON] and [PERSON]'s study on college students explored how TAM functioned by using sport equipment and found that perceived ease of use has positive effects on perceived usefulness [22]. Both perceived ease of use and perceived usefulness have positive effects on attitudes. Attitude has a positive influence on sport equipment usage behavior.  
Based on the three factors of TAM, the intentions to use technology is defined in terms of Nintendo Switch users' perceptions about their attitude towards the Nintendo Switch console. The following hypotheses were considered to assess the Switch user's attitude towards the actual intention to play Nintendo Switch or purchase it.  
**H1.**: _Switch user's perceived ease of use has a significant effect on the perceived usefulness. [PEOU\(\rightarrow\)PU]_
**H2.**: _Switch user's perceived ease of use has a significant effect on the attitude towards playing Nintendo Switch. [PEOU\(\rightarrow\)ATT]_
**H3.**: _Switch user's perceived usefulness has a significant effect on the attitude towards playing Nintendo Switch. [PU\(\rightarrow\)ATT]_  
**H4.**_Switch user's attitude has a significant effect on the behavior intention of playing Nintendo Switch. [ATT\(\rightarrow\)BI]_