Final answer:
Respondents may not share their thoughts during a personal interview survey for market research due to fear of judgment, social desirability bias, lack of time, and the absence of anonymity.
Step-by-step explanation:
Respondents may choose not to share their thoughts with an interviewer during a personal interview survey for market research due to various reasons:
Fear of judgment: Some respondents may fear being judged by the interviewer and may therefore refrain from sharing their thoughts.
Social desirability bias: Respondents may answer in a way that they believe is socially desirable or acceptable, rather than expressing their true thoughts or opinions.
Lack of time: Some respondents may feel rushed during the interview and may not have enough time to fully articulate their thoughts.
Anonymity: Respondents may feel more comfortable sharing their thoughts if they have the option to do so anonymously, as it allows them to express themselves freely without fear of judgment or repercussions.