The study inquires about the respondents motivations to benefit him/herself, and the following social groups: the family, the Black community, the White community, God and church, The U.S. society, the non-White races of the world, and the human species as a whole.
[sic] Michele Obama
Looks ok to me
Aha!
Busted.
You're a Princeton grad.
Respondents' is in the possessive plural, hence the corresponding personal pronouns must likewise be in the plural.
That's just for starters. I'm sure that if I subjected myself to the rest of the text, I'd want to "off" myself by the conclusion.
Regards,