What developments in science intellectual affairs and the arts in the late nineteenth and early twentieth centures opened the way to a modern consciousness and how did this consciousness differ from earlier worldviews

There were a number of world changing developments in science and art that made the world turn into more skeptical and individualistic with the modern age.

Explanation:

The defining events of scientific innovation of the time period in question was

-the discovery of AC electricity and its  regular usage

-The theory of relativity

-the discovery of the atom

-the theory of evolution

-The development of the airplane

These discoveries completely transformed the life of the common person of the time and make them get over their older values of life.

In art there were also massive developments happening

-The publishing of the Origin of the Species

-The publishing of Karl Marx's work

The work of Sigmund Freud

-The work Neitzsche

These works transformed the way people saw the world around them and became skeptical of their accepted values of morality and the society that surrounds them.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.