Language Point 11

This is reasonable, for psychologists use this term to describe mental processes which are unknown to the individual. (Para. 2)
Meaning: The explanation holds water as psychologists use this special term to describe the patterns going on in our mind, which are not known by human beings.
process: n. a connected set of actions or events that produce continuation or slow change
In this example, the conscious mind at the moment of creation knew nothing of the actual processes by which the solution was found.

在這個事例中，意識在創造的時候對發現答案的實際過程一無所知。
Scientists have now discovered more about the processes of sleep and dreaming.

科學家已經發現了更多的有關睡眠和做夢的過程。
Psychologists study the processes by which human personalities are formed, develop and change.

心理學家研究人類性格的形成、發展和改變的過程。