When people give me large amounts of information, I will take plenty of time to process it before giving a response. The amount of time I take usually ranges from 30 seconds to a few minutes depending on the amount of information and whether or not it is about a subject that I am well versed in. Over the course of my life I have developed a reputation of having strong opinions and being very blunt in sharing them.
These two things combine to cause some issues for me at work. Often times, when someone is giving me feedback about my performance, they will tell me the feedback they have and then ask me if I understand it. When I don't give an immediate response (because I'm still trying to process the information), my coworkers often assume that I disagree with them and am going to push back against their feedback which leads them to become defensive.
It is worth noting that my needing extra processing time might be related to the fact that I am on the autism spectrum, which the co-workers with whom I have this issue are aware of.
What I've Tried
I have tried a couple of different things to indicate that I am just trying to process the information. The two main things have been putting my hand on my chin in a very obvious way to indicate that I'm thinking and verbalizing my intent with something along the lines of
Let me think about that for a minute
I have not seen any difference in my interactions when I've tried using either of these things.
How can I use body language to convey to other people that I am just taking time to process information rather than disagreeing with it?