The clever folk at Cambridge University have developed a mobile service which could have numerous applications for travel.
EmotionSense, currently only available for Android devices, lets people input information about how they're feeling at different times of the day and combines it with data on what's going on around them.
So, while the psychologists at Cambridge are thinking in terms of the app as a doctor in your pocket, what if consumers used it while writing a review on TripAdvisor and incorporated information on how they really feel about the check-in experience and their hotel room.
It could certainly help with creating more authenticity around reviews.
A further use of the technology might be for airports to gauge the emotions (stress) of travellers passing through and take steps alleviate some of the problems.
According to this report the app has a built in sensor which collects information about a user for a week and then asks them to complete a lifestyle satisfaction survey before further sensors kick in gathering information on a range of activity such as frequency of calls and texts, location and other mobile behaviour.
The emotion and environment data is plotted on a grid (as per image above) to see how people feel when in engaged in different activities.
Interestingly the EmotionSense code is being made publicly available to enable other researchers to play around with it so perhaps travel app developers could find some uses.
It's not a million miles away from Carlson Wagonlit Travel's stress algorithm which aims to calculate the cost of unproductive travellers due to stress.