Answer:
Context effect
Step-by-step explanation:
Context effect explains how an individual's perception of a stimulus is affected by the individual's environment. Context effects can have an influence on one's day to day activities, such as one's learning abilities, recognition of words, recognition of object and memory. Context effect is considered to be part of top-down processing.
In the example illustrated, the perception of people are influenced by their environment which is the sad music that is being listened to, and this best explains context effect.