System and method for measuring user engagement

A system for monitoring user engagement with computer applications, the system having a simplified engagement analysis capabilities and reduced computation complexity and is capable of accessing a plurality of sensors measuring user engagement activities, the system comprising:

• at least one hardware processor, configured to:
• receive from the plurality of sensors information about a sequence of interactions of a user with a software application during a time interval, said information comprising, for each of said sequence of interactions, a plurality of sensor output values of a plurality of engagement metrics reflecting said user's emotional attachment to said software application;
• compute a sequence of linearly uncorrelated principle components based on an outcome of principal component analysis (PCA) of said plurality of sensor output values of said plurality of engagement metrics;
• select a first component from said sequence of linearly uncorrelated principle components to represent a trend of engagement of said user with said application during said time interval according to said plurality of engagement metrics;
• and
• change a user interface of the software application according to the trend.