General fluid/inductive reasoning battery for a high-ability population.

The validity of studies investigating interventions to enhance fluid intelligence (Gf) depends on the adequacy of the Gf measures administered. Such studies have yielded mixed results, with a suggestion that Gf measurement issues may be partly responsible. The purpose of this study was to develop a Gf test battery comprising tests meeting the following criteria: (a) strong construct validity evidence, based on prior research; (b) reliable and sensitive to change; (c) varying in item types and content; (d) producing parallel tests, so that pretest-posttest comparisons could be made; (e) appropriate time limits; (f) unidimensional, to facilitate interpretation; and (g) appropriate in difficulty for a high-ability population, to detect change.

Using response time data to reduce testing time in cognitive tests.

Achievement estimates are often based on either number correct scores or IRT-based ability parameters. Van der Linden (2007) and other researchers (e.g.

Antepartum testing for women with previous stillbirth.

Women with past histories of stillbirth have been referred for antepartum surveillance since the inception of electronic fetal monitoring. However, this approach was originally based on mid-twentieth century perinatal studies that noted an increase in adverse outcomes in pregnancies subsequent to stillbirth. When these landmark studies were done, Rh immune globulin, ultrasonography, and other important medical advances had not yet occurred.