Question

who said psychology is the science of human behaviour and its relationship​

Answer 1

The first use of the term "psychology" is often attributed to the German scholastic philosopher Rudolf Goeckel (Latinized Rudolph Goclenius), published in 1590. [1] More than six decades earlier, however, the Croatian humanist Marko Marulić used the term in the title of a work which was subsequently lost.ion:

Answer 2

Rudolf Geoclek said this line