To determine how the same group of respondents feels at different points of time,the researcher must use what kind of study?

Question

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A longitudinal study follows the same group of participants over a period of time, allowing researchers to track changes in attitudes or behaviors. This would be the best choice for determining how the same group of respondents feels at different points in time. A mail, internet, or telephone study would not necessarily involve following the same group of respondents over an extended period.

To Determine How the Same Group of Respondents Feels at Different