The purpose of this study was to compare the perceptions of teacher competence within and among three groups of educators as measured by the interview scales of the Instrument for the Observation of Teaching Activities (IOTA). (Auhor)

This paper discusses three randomized response techniques (the dichotomized question, the unrelated question, and the single question/random answer), the simple probability theory that makes the techniques work, and some questions about the practical application of these techniques by the educator. (Editor)

The detrimental effects of nonresponse bias are particularly significant given the widespread use of the survey data collection method in educational surveys. Current methods for remediating nonresponse bias in educational surveys are explored and critiqued. (Author/LMO)