This might be a more different question about difficulty than others, and might be a hard one to answer.
I am designing an educative application for tablets. The concept consists of a game where kids aged from about 10 to 12 years oldlearn the proces a certain product or service undergoes. Like the path from a cotton plant to the t-shirt they wear.
I have done my first UX test and had some useful responses. However I am not sure how to measure the difficulty of a question. Is it too hard or is it too easy? I made notes, did observation. Asking questions about this was too suggestive in my opinion.
Have you had this problem before?