Gibbons, Robert D., Duan, Naihua, Meltzer, David, Pope, Andrew, Penhoet, Edward D., Dubler, Nancy N., ...
One of the most visible and contentious issues regarding the fairness of the original system of organ procurement and allocation is the argument that it resulted in great disparities in the total...
Approximating Multivariate Normal Orthant Probabilities Using the Clark Algorithm. (1998)
Gibbons, Robert D., Bock, R. D., Hedeker, Donald
The probability of m correlated random variables is drawn from a multivariate normal distribution being non-negative. Exact results for this probability integral are unavailable for m > 3....
Conditional Dependence. (1998)
Gibbons, Robert D., Bock, R. D., Hedeker, Donald
The probability of m correlated random variables drawn from a multivariate normal distribution being non-negative is given. Exact results for this probability integral are unavailable for m > 3....
Multivariate Generalizations of Student's t-Distribution. (1998)
Gibbons, Robert D., Hedeker, Donald, Bock, R. D.
In the process of developing a conditionally dependent item-response theory model, we were confronted with the problem of modeling an underlying multivariate normal (MVN) response process with...
Approximating Multivariate Normal Orthant Probabilities. (1998)
Gibbons, Robert D., Bock, R. D., Hedeker, Donald
The probability integral of the multivariate normal distribution has received considerable attention since Sheppard (1900) and Pearson (1901) published their seminal work on the bivariate normal...
Full-Information Item Bi-Factor Analysis. (1998)
Gibbons, Robert D., Hedeker, Donald R., Bock, R. D.
A plausible s-factor solution for many types of psychological and educational tests is one in which there is one general factor and s-1 group or method related factors. The bi-factor solution results...
TALSMA, DANIELM., LEACH, CHESTER L., HATOUM, NABILS., GIBBONS, ROBERT D., ROGER, JEAN-CLAUDE, ROGER, JEAN-CLAUDE
Reducing the Number of Rabbits in the Draize Eye Irritancy Test: A Statistical Analysis of 155 Studies Conducted over 6 Years. TALSMA, D. M, LEACH, C. L., HATOUM, N. S., GIBBONS, R. D., ROGER, J.-C,...
An Empirical Test of a Kraepelinian vs. a Bleulerian View of Negative Symptoms (1985)
Gibbons, Robert D., Lewine, Richard R.J., Davis, John M., Schooler, Nina R., Cole, Jonathan O.
Confirmatory factor analysis was used to test a Kraepelinian vs. a Bleulerian interpretation of negative symptoms. The former focuses on absolute loss of functioning, while the latter emphasizes the...