The traditional definition of an interaction effect in analysis of variance makes it difficult to size up its magnitude because it entails the knowledge of all the cell means in the factorial design. We use orthogonal coding to decompose the interaction effect into distinctive components that are ...
OBJECTIVE: To determine the roles of immediate pars plana vitrectomy (VIT) and systemic antibiotic treatment in the management of postoperative endophthalm... EVS Group - 《Arch Ophthalmol》 被引量: 1937发表: 1995年 Rationale and design of the INFUSE-AMI study: A 2 × 2 factorial, randomized...
Abstracts Fifteenth Annual Meeting of the Society for clinical trials The Westin Galleria Hotel, Houston, Texas May 8–11, 199402A Log-rank statistic for testing interaction effect in a 2 × 2 factorial design and its use in sample size determination...
If you suspect a statistical interaction exists, afactorial designcan help you identify what the interaction effects are. In a factorial design, you run every possible combination of levels (in the above example, the levels of independent variable would be the diet drink and diet pill). An int...
Six kinds of OCPs and 2 kinds of isoflavones-genistein and daidzein were included to study their effect on MCF-7 cellsin vitro. Eighty-one female Sprague-Dawley rats were randomized to 9 groups according to factorial design to study the interaction effect between isoflavones andγ-HCH. Compared...
The present work is concerned with the effect of turning process parameters (cutting speed, feed rate, and depth of cut) and distance from the center of work piece as input variables on the chip micro-hardness as response or output. Three experiments were conducted; they were used to investig...
In traditional experimental design, the effect of one factor is assessed by varying its value, and keeping all other factors constant23. This method can only study one factor at a time and cannot capture the interactions between factors24. The fractional factorial design (FFD) provides an option...
This contrast tests for a linear time-by-condition interaction in the Generate-Read experiment (when conceived as a 2 × 6 factorial design). Again, the contrast weights can be viewed as the Kronecker product of the Generate versus Read effect and the linear time effect, i.e. [1 – 1]...
In addition to size, propagule shape can also be important for establishment success. In vascular plants, relatively spherical dispersal structures (seeds, fruits, etc.) tend to live longer in the seed bank42. However, no previous study has directly addressed the effect of the shape of the ...
(i.e., distributed or collocated), little is known about how their combination could influence user’s interaction in CMR. In this paper, we present a user study (n = 46, 23 pairs) that investigates the effect of the mixed reality setup on the user’s immersion and spatial interaction ...