To understand the connection of user interface and user experience design of website with the psychology of visitors, let’s know the exact definition of these terms:

• User Experience (UX) design is the overall experience – mental, sensory and emotional experience of a website visitor when interacting with the website.
• User Interface (UI) is the part of the website that is visible to visitor or portion of website that user interacts with.

These definitions when combined together give rise to the concept of user-centric design. This is the design pattern that web app development agency try to implement for creating a long lasting positive impression in the minds of visitors.

User centric design is a philosophy that places ‘user’ above all design elements. Priority of the design theme is decided on the basis of predictive interaction of user with the website. This may require testing of user’s first time behavior with the website to analyze following criteria:

• How would user interact with this design element?
• What phycology effect would this color have on user’s minds?
• How friendly is this interface with respect to website visitor?

These questions are related to human psychology, i.e. how user perceives different design element and what effect it has on minds.