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I'm sure you've already talked to the student about his issues? I had one like this before. Older guy, very nice, competent, but needed prompting all the time for everything. If I didn't say anything, he'd still look at me. I damn near wore out my voice building him up and trying to make him more confident. The 2 things that worked for me were 1. Shrugging my shoulders staring straight ahead and saying "I don't know" to everything... and 2. Telling him flat out that until he starts making his own decisions, nobody will endorse him for the checkride and his training will take longer.
I took a gamble with the second one, but I didn't know what else to do by that point. He quickly learned to make his own decisions. It's amazing the improvement you see in students once money enters the equation.
Nowadays, I would try to curb that problem by encouraging students to make their own decisions early in the training process.