- International Personality Item Pool
This IPIP Website is intended to provide rapid access to advanced measures of individual differences, all in the public domain, to be developed conjointly among scientists worldwide, and raw data available for reanalysis; in addition, it should serve as a forum for the dissemination of psychometric ideas and research findings.
(Added: 31-Jul-2000 Hits: 2347)
- Measuring Aptitude
This article defines aptitude tests in contrast to intelligence tests and achievement tests. It also looks at the value of aptitude tests and examines how the results of aptitude should be used. Finally, this article discusses whether students can improve their scores on these tests.
(Added: 26-Dec-2003 Hits: 3553)
- More Multiple-choice Item Writing Do's and Don'ts
What follows here is a fairly comprehensive list of recommendations for writing multiple choice items. Some of these are backed up by psychometric research; i.e., it has been found that, generally, the resulting scores are more accurate indicators of each student's knowledge when the recommendations are followed than when they are violated. Other recommendations result from logical deduction.
(Added: 26-Dec-2003 Hits: 919)
- Reducing Error in Mail Surveys
Surveys allow information to be collected from a sample group and generalized to the population at large. Because they are low cost and easy to implement, mail surveys are used more frequently for social research than either telephone or face-to-face interviews. Those conducting surveys should recognize four potential sources of error -- sampling error, non-coverage error, non-response error, and measurement error -- and take steps to minimize their impact.
(Added: 26-Dec-2003 Hits: 437)
- The Flynn Effect
In his study of IQ tests scores for different populations over the past sixty years, James R. Flynn discovered that IQ scores increased from one generation to the next for all of the countries for which data existed. This interesting phenomena has been called "the Flynn Effect." This site attempts to explain the issues involved in a way that will better help you to understand the Flynn Effect.
(Added: 24-Jul-2000 Hits: 1429)