# Commonly Used External TAM Variables in e-Learning, Agriculture and Virtual Reality Applications
## 5 Discussion
These results are in line with the investigation conducted by [PERSON] and [PERSON] [130], who reported a direct effect of ANX on PEOU and an indirect effect on PU. CQ is a variable especially crucial in learning platforms. By designing and organizing the content in a challenging, reasonable, appropriate, and understandable manner, users' autonomy and competence may be enhanced [101]. Solely researchers interested in assessing the acceptance of systems/platforms/or services, which belong to the same category, and theoretical works, registered the direct effect of content quality on PU and PEOU. Theoretical studies reported a weak influence of CQ in PU and PEOU. On the contrary, PU and PEOU of systems, platforms, and services are strongly affected by the CQ. The influence of CQ on PU and PEOU mentioned in the last category is in accordance with the study conducted by [PERSON] et al. [131] who reported that CQ has positive effects on the two TAM beliefs. According to [PERSON] and [PERSON] [23], increasing the EXP will give the user a better idea about the required effort to develop a specific task using the technology [132; 133] and may also create a favorable feeling about system usefulness [75; 134]. In line with those authors, our findings suggest that previous interactions with innovations have a larger effect on PEOU than in PU. Specifically, EXP has a strong predictive influence in PEOU and a medium impact on PU in the systems' acceptance. In the case of devices' acceptance, prior use has a moderate effect on PEOU and little effect on PU. Literature reviews examined in our study found that EXP has moderate importance in determining PU and PEOU. FC are a measure of the available resources to support a given behavior [58; 60], and the expertise required [21]. Similarly to [PERSON] et al. [135], we also found evidence that FC can enhance the idea of how easy it can be to perform a task [135]. Our study's outcomes indicate that users' perception of FC is a crucial determinant of PEOU when the acceptance of a set of complementary technologies is being assessed. FC's decisive role in determining the PEOU was also evident in theoretical studies, which in turn reported a medium impact of FC in PU. We also found that when the technology was a system or service, FCs have a medium influence in PU and PEOU. When the research interest was to predict a device's acceptance, FC moderately affected PEOU and slightly determined PU of this type of technology. One of the most noteworthy findings suggests that users PEOU of a bundle of innovations will be strongly influenced by the FC associated with the complementarity of those technologies. Additionally, FC's role is more appreciated when it comes to the use of platforms than in the case of a device. II is considered a personal trait. An innovative person will be eager to face the risks associated with the early stages of technology readiness and will have more definite intentions to use new IT [136]. We observed that this external factor has a medium-sized relationship with PU in situations in which users have to express their preferences from a group of technologies available. II also moderately influences PU of systems, services, or platforms. For this same category, the importance of II seems to be considerably less in PEOU. Only studies concerning the acceptance of systems reported the relationship between II and PEOU, indicating that its effect is insignificant on PEOU for our research categories. PE is understood as an intrinsic motivational factor [137]. PE is a significant predictor of PEOU in the context of devices and systems or services acceptance scenarios. The theoretical category reported a medium strength of the relationship between PE and PEOU. PU is also primarily affected by PE of using devices, and this is in line with the category of theoretical studies. As for systems and services, PE has a medium impact on PU. [PERSON] and [PERSON] [121] stated that the higher the SE expectations, the higher likelihood of succeeding in a particular assignment.