Choice-supportive bias affects video viewing experience: Subjective experiment and evaluation

In recent years, with the spread of video streaming services and remote web conferencing systems, the increase in the number of end hosts connected to the Internet, the improvement of end host performance, and the diversification and sophistication of applications, the demand for communication quality of service (QoS) from users and service providers has become even higher. However, the amount of traffic flowing through the network is increasing year by year, and it has become difficult to operate a system that guarantees a certain level of QoS for users. In other words, best-effort type network systems have become the mainstream. Not only QoS, but also the user's own quality of experience (QoE) has become important, and application level control to improve user QoE within limited communication resources has become very important for both users and service providers. Since QoE is a subjective measure of a user's perception of a service, it is considered to be affected by cognitive biases that are observed in human subjective decision-making. In this paper, we conduct an experiment focusing on the choice-supportive bias, which is one of the cognitive biases, and clarify the effect of this cognitive bias on users during video viewing.