asaris

I'm generally very suspicious of this sort of thought experiment, so my basic answer is "I don't know". But here are some of my suspicions, for your questions I have suspicions about:

Most people would think of it as a child, since it would look like a child.

Depends on what you mean by soul. If people generally have souls, yes. If people don't generally have souls, no. I don't see how this experiment would change the existence or non-existence of a soul.

Perhaps. That's really a question for a psychologist rather than a philosopher.

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"Die Deutschen meinen, daß die Kraft sich in Härte und Grausamkeit offenbaren müsse, sie unterwerfen sich dann gerne und mit Bewunderung:[...]. Daß es Kraft giebt in der Milde und Stille, das glauben sie nicht leicht."

"The Germans believe that power must reveal itself in hardness and cruelty and then submit themselves gladly and with admiration[...]. They do not believe readily that there is power in meekness and calm."

-- Friedrich Nietzsche