OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543 STRUCTURE OF GENERAL FACTORIAL DESIGNS . . . . . . . . . . . 543 SUITABLE CONFOUNDING RULES . . . . . . . . . . . . . . . . . . . . . 544 Design Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544 Block Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545 Gener...

Factorial designs have broad applications in agricultural, engineering and scientific studies. In constructing and studying properties of factorial designs, traditional design theory treats all factors as nominal. However, this is not appropriate for experiments that involve quantitative factors. For designs with quantitative factors, level permutation of one or more factors in a design matrix ...

In the Wechsler Adult Intelligence Scale-Third Edition (WAIS-III; D. Wechsler, 1997), the manual reports several confirmatory factor analyses in support of the instrument's latent factor structure. In practice, examiners frequently compare an examinee's score from a current administration of the WAIS-III with the results from a previous test administration. Implicit in test-retest score compari...

OBJECTIVE To evaluate the validity of the Ghent Multidimensional Somatic Complaints Scale (GMSCS) in a Clinical Sample. METHOD Three hundred fifty-four non-clinical subjects and 151 clinical patients completed the GMSCS, an 18-item five-factorial scale for the assessment of somatic complaints. RESULTS The five-factorial structure was reliable and valid in the non-clinical as well as the cli...

The colon is a promising site for drug targeting owing to its long transit time and mild proteolytic activity. The aim of this study was to prepare new low methoxy amidated pectin/NaCMC microspheres cross-linked by a mixture of Zn(2+) and Al(3+) ions and test their potential for colonic targeting of progesterone. A 2(4) factorial design was carried out to optimize the preparation conditions. Hi...

We propose a method to compute a desingularization of a normal affine variety X endowed with a torus action in terms of a combinatorial description of such a variety due to Altmann and Hausen. This desingularization allows us to study the structure of the singularities of X. In particular, we give criteria for X to have only rational, (Q-)factorial, or (Q-)Gorenstein singularities. We also give...

The Physical Self-Perception Profile (PSPP) is widely used to measure self-evaluations in the physical domain and its validity has been supported in a wide range of samples. The purpose of this research was to examine the factor structure of PSPP and its factorial invariance across gender. Participants were 315 (131 males, 184 females) college students. Exploratory factor analyses showed that P...