Emotion is a word widely used in our everyday language, but when it comes down to defining what an emotion actually is, it becomes difficult to reach consensus on the
matter. Words like ‘emotion’, ‘mood’ or ‘feeling’ are all used by laypersons to define a single concept, and it is precisely this ambiguity of the definition which makes it all the more difficult to measure it. Psychologists define the concept of emotion as a process of changes in different components rather than a homogeneous state (Scherer 2001). According to this view, the different states can be categorized into emotions (like anger, disgust or happiness) as a combination of different levels of these main components.