Usage patterns
〈人〉の人格を疑うto doubt someone's character
Saying something like that makes me doubt his character.
人格を尊重するto respect a person's dignity/personhood
Teachers should respect their students' personhood.
人格が形成されるfor one's character to be formed/shaped
Childhood experiences greatly influence how one's character is formed.
人格を否定するto deny/attack someone's personhood
The boss's words were like a denial of his very personhood.