Makes me wonder if that forbidden experiment did in fact and perhaps still does occur. I seem to remember reading that it was done in the middle ages by some lunatic royalty who wanted to see what happened to infants if they were never spoken to or emotionally engaged with in any way. Only had physical needs met. This maniac was searching for proof of human soul, I think. The infants which received only basic physical needs did not flourish.

You're mixing up two different experiments. James IV of Scotland had a theory that children would grow up speaking Hebrew if they were prevented from learning any other language, so had two children brought up on an uninhabited island by a deaf-and-dumb adoptive mother. (Or he intended to do that - we don't know for sure if he went through with it). The mother would otherwise have treated the babies normally, they only thing they wouldn't get from her was language.

The experiments on denying infants any emotional contact were done in the 1950s, in the US. The victims were macaque monkeys.