In my latest answer, I explained the concepts of benevolence-based trust and integrity-based trust:
Intentions are more important than honesty for building benevolence-based trust.
So, a pro-social deception, even if found out, can still make Alice trust that your friend has good intentions towards her. [...]
Although prosocial lies increase benevolence-based trust, they harm integrity-based trust.
Meaning that next time Alice asks your friend if a dress looks good on her, and your friend answers with yes, Alice might think twice before taking that as an answer: She might start wondering if you're just being kind or really being honest.
I'm currently in a situation with a few people where there's a lot of benevolence-based trust, but it's getting in the way of the integrity-based trust.
For example, there's been some private stuff going on that has my mother regularly voicing she feels like a bad mom. Whenever I tell her that's not true, and that she did a good job of raising all her kids, and that whatever those kids are struggling with now isn't her fault, she flat out thanks me for my kind words, but you can see she doesn't believe them.
I do want her to believe me though, and I've told her such. It doesn't help much. I tried being more honest and avoiding any pro-social deceptions, but that's not doing much good either. It mostly leads to people believing I'm only honest when I have something to say that isn't all that kind.
I realize that due to some past interactions with these people, while they still trust I have good intentions, they just can't get themselves to trust that I am also speaking the truth. I'd like to restore a certain balance here, work back to a relationship with these people where they can trust I have good intentions and also trust me to be honest whenever I say something kind.
When there's a severe unbalance between levels of benevolence-based trust and integrity-based trust, what techniques are scientifically proven ways to restore a certain level of integrity-based trust?
NOTE: This question is about academic research on this topic and scientifically proven ways to restore integrity-based trust. As such, answers should link to research, not just personal experience, to meet our citation expectations.