No, it is not different in subject matter. All areas assessed in the standardized version exist in the modified version. Having the areas interpreted into ASL is one of the delivery methods used with the standardized test. Questions that require oral knowledge and expertise are worded so as to not require that expertise to assess knowledge in a modified test. However, the same areas of cognition are assessed.
I would think that a school for the deaf would be using a modified test, but you are correct. You never know unless you ask. But even if they aren't, there will be an administrator familiar with issues with deaf students so that interpreting the results will be more accurrate to actual function.
