The current study involved the development, scaling, and validation of a new, brief, strength-based measure of children's ecological support, as rated by their parents. The scaling and validation of the Child and Youth Ecological Assets Scale--Parent Form (C-YEAS-P) took place through two studies. The first study involved 500 parents who were…

Simulations were conducted to examine the effect of differential item functioning (DIF) on measurement consequences such as total scores, item response theory (IRT) ability estimates, and test reliability in terms of the ratio of true-score variance to observed-score variance and the standard error of estimation for the IRT ability parameter. The…

The Ability Explorer (AE) is a newly developed self-report inventory of abilities that is appropriate for group or individual administration. There are machine-scorable and hand-scorable versions of the test, and there are two levels. Level 1 is for students from junior high to high school, and Level 2 is for high school students and adults.…

A measurement and psychometric examination of cognitive tasks was carried out with 195 undergraduates, investigating stability of latencies and number correct scores over a 2-week period and relations with standardized test and ability measure scores. Results are discussed in terms of the need for evaluating cognitive task measurement properties.…

Bias, standard error, and reliability of five ability estimators were evaluated using Monte Carlo estimates of the unknown conditional means and variances of the estimators. Results indicate that estimates based on Bayesian modal, expected a posteriori, and weighted likelihood estimators were reasonably unbiased with relatively small standard…