ABSTRACT
In an adaptive design setting, a key element is the design features that may be altered or tailored as part of the design. In a face-to-face survey, prioritization can mean that the importance of the case is communicated to interviewers. In a telephone setting, these prioritization schemes can be implemented through a sample management system, thereby negating the interviewer compliance issue. Mail surveys have their own contact strategies that involve the type, number, and frequency of mailings that are used. Web surveys may combine several types of contact strategies based upon the information available on the sampling frame. Dosage is relevant for other aspects of the survey design as well. In mixed-mode surveys, the number of attempts to recruit sampled units to each mode is a relevant design feature. Another feature of survey design is the sequence in which treatments are offered. In the broadest sense, each sequence could be thought of as a unique treatment.
