There are several blank spaces in the description which can be confusing to decipher.
Experimental psychology begins with Wilhelm Wundt, who is also known as the father of the field of psychology. His work on experimental psychology began when he starts recording reaction times of his research subjects – which is line with his background, which was in physiology.
The next line, which is “… used the latter approach”, is no longer related to experimental psychology, which I assume is why it is cut off.
My reasoning for this is that warmer climate have incredible insects and animals, it's a better time for swimming, and you don't have to worry about getting the flu just yet.