I've seen approximately 4000 people for SED/ARFID now and I've experienced ARFID in two forms: a phobic form and a sensory processing disorder (SPD) version
To confuse matters, one's perception (which determines how you think, act, feel and behave towards what you perceive) is itself influenced by fear.
Fear will distort one's perceptions of textures, smells, tastes etc, so many people I have successly treated who made remarks about texture or smell at the start of the session assumed they had the SPD version. However, once the underlying fear was removed, their perception was 'uncontaminated' by fear and they could assess food more objectively and problems with texture and taste simply cleared up.
So sometimes SPD comes off looking like ARFID, when it is still ARFID.
Unfortunately, the converse is true too. Some people think they have a phobia when they have a SPD and are disappointed when there is no change after the treatment.
It's hard to know what is going on unless I do the session and start a process of elimination!. There is no guarantee I'm afraid, but if you do have the phobic form, which is more likely, then if anyone can resolve this, its probably me.
The presence of SPD is what I believe keeps me from having a 100% success rate with ARFID in general, but it is running a close second place at approx 95%.
With teenagers and young children success may be blocked due to a number of other interfering dynamics present – power play and politics, keeping preferential treatments and attention, defiance, not being ready etc, all of which sabotage the therapy and will need to be resolved prior to treatment for ARFID.
For more information please see the other articles on ARFID.