When implementing behavioral observation with a child client, the psychologist should be on the lookout for in which the child’s behaviors change simply because the child realizes they are being watched by the psychologist.

reactivity                                

Explanation:

Reactivity: In psychology, the term "reactivity" is described as a phenomenon that tends to occur or happen when a person ought to alter or change his or her behavior or performance due to the awareness of the person that he or she is being watched or observed by the other person. However, the changes related to this phenomenon can be a negative or a positive change and completely depends on the situation itself in which the person is being observed.

In the question above, the given statement signifies reactivity.

its d i know cause i've been googling it

answer; john locke;