Two studies were conducted to test the viability of a survey version of full-profile conjoint analysis. Conjoint analysis describes a variety of analytic techniques for measuring subjects'"utilities," or preferences for the individual attributes or levels of attributes that constitute objects under study. The first study compared the…

Available methods for collecting human factors data rely heavily on observations, interviews, and questionnaires. A need exists for other methods. The feasibility of using two-way voice-radio for this purpose was studied. The data collection methodology consisted of a human factors analyst talking from a radio base station with technicians wearing…

The various costs of Type I and Type II errors of inference from data are discussed. Six methods for minimizing each error type are presented, which may be employed even after data collection for Type I and which minimizes Type II errors by a study design and analytical means combination. (Author/CM)

This bulletin is designed for the researcher, the doctoral or master's candidate, or teacher interested in and/or conducting research. Content is presented in five chapters. Chapter 1 (The Research Problem) discusses what research is, selecting a topic, defining and stating a problem, and identifying the type of study. Chapter 2 (The Literature…

Generalizability theory extends previous methods of estimating the reliability of rating instruments such that one can estimate the precision of a measurement system for differentiating among students, scales, or any other important dimension. In this study, generalizability theory is applied to faculty ratings of junior and senior dental students…

Twenty-eight mature women were recruited from the community and trained in a 21 category observation code of family interaction. Observers were assigned randomly to three experimental groups and given different expectancy rationales about the outcomes of the studies for which they would be collecting data. All groups were told they would be…