Before revision:  Therefore, this review aims to integrate previous studies from these fields to understand how to develop virtual environments that can automatically create visual representations of users' emotional states. This manuscript addresses this challenge in three sections: First, theories related to emotion and affect are compared .
After revision:  Therefore, this review aims to integrate previous studies from these fields to understand how to develop virtual environments that can automatically create visual representations of users' affective states. The manuscript addresses this challenge in three sections: First, theories related to emotion and affect are compared .