International Large-Scale Assessments (ILSAs) serve to monitor and benchmark educational achievements, providing accurate, ...

Survey researchers increasingly recognize that a single survey of the general public can rarely represent the views of small groups of Americans. Such surveys frequently have too few interviews with ...

Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...

Data collection is the process of gathering and measuring information used for research. Collecting data is one of the most important steps in the research process, and is part of all disciplines ...

A new telephone survey experiment finds that, despite major structural differences, an opinion poll drawn from a commercial voter file can produce results similar to those from a sample based on ...

The IRB is responsible for evaluating proposed research to ensure adequate provisions to protect the privacy of participants and to maintain the confidentiality of data. Research involving human ...