What are the problems in generalizing Little Hans to other children?

There are many problems in generalising Little Hans to other children. This comes from the fact that Hans is a single case, with experiences that are unlikely to match any other child. Hans had seen a carthorse fall over in the street, for example. Most children don't witness such an event. Hans also was having thoughts (fear of horses) that other children do not. For these reasons, it is very difficult to generalise Little Hans to other children.