Hi Joy. Since other have posted about the legal implications I won't comment further on that, but there are a couple reasons for your husband to accompany you. In addition to providing a ride and emotional support, the usual protocol is to include the spouse in the interview portion of the evaluation.

The evaluation itself will likely be performed by a PhD level clinical neuropsychologist. The typical format is an opening interview (which is where your husband would come in) followed by a series of tests which could include general intelligence tests (Wechsler AIS), a depression and/or anxiety inventory, verbal and visual recall such as digit span, trail marking, word memory, and pattern recall. Following the tests the neuropsychologist will probably review the finding with you.