Lacerta files had some advice on defense:

Question: How can we protect us against this influence on our mind?

Answer: I don't know. I doubt you can, because your mind is like an open book to read and write for nearly every species I know. This is partly the guilty of the "Illojim" themselves, because they had constructed or better mis-constructed (partly intentionally) your mind and your consciousness without real protection mechanisms. If you are aware that someone tries to manipulate your mind, you can only concentrate on that suspicion and try to analyze every one of your thoughts and memories.

Very important: don't close your eyes (this would lead to a different form of brain waves which are more easy to access) and don't sit or lay down to rest.

If you stay awake during the first minutes, you can maybe try to filter the other thoughts and waves in your brain and the inducer will give up after some minutes if he or she is not successful because it will start to hurt his or her own brain. This is very difficult and certainly painful and it can harm you, so better don't try to resist but it would be the only possibility you have.

However, you can try this only with the more weaker species, not with the strong.