Ethics of social research.. Disqualification of bias in favor of a group of respondents. Scientific objectivity. Confidentiality of private information

Social research has several ethical requirements that must be observed:
1. Confidentiality of private information.
2 - not to ask personal questions hurt the feelings of the respondent.
3 - Disqualification bias in favor of a group of respondents.
4 - scientific objectivity which means the exclusion of all considerations of emotional, emotional or moral.