The OP references 'thinking skills of new Witnesses'.
This question is significant and should be of great concern.
In developed parts of the world, it's reported that the majority of baptismal candidates are born-in/raised-in youths. Many of these young kids have born-in parents. It's their grandparents who studies with Jehovah's Witnesses and made an adult decision to become members of this religion.
As a result, the 'new' ones are products of generational mental simplification. To compound the problem, the WT refuses to give the okay to it's members to pursue professional degrees through higher education.
The 'new' Witness finds himself with only a basic (at best) understanding of history, science, the arts and economics. His earning potential is well below the median for his part of the world.
He needs outside structure (his religion) to dictate how he will participate in life. He is a conformist. He is only concerned with the basic necessities of life (like a baby). He is dependent. He is controlled.
ginger