This book addresses the differences between qualitative and quantitative data collection methods in empirical social research. Using interview and questionnaire data on informal care for elderly relatives as an example, the advantages and disadvantages of both survey techniques are discussed, leading to a clear conclusion for research practice. In addition to the comparison of methods, the book provides extensive insights into the motivations for taking on caregiving responsibilities, the issues of stress and burden, as well as the recovery opportunities for family caregivers.