Bilateral synchronous transitional ureteral carcinoma: two additional cases

Bilateral synchronous transitional ureteral carcinoma has previously been reported only 11 times. Herein, two additional cases are reported. Analysis shows these tumors to be of relatively low grade and low stage. It is necessary to fully evaluate the opposite side in a patient presenting with unilateral ureteral tumor. If bilateral disease is present, a conservative surgical procedure should be done.

Renal carcinoma presenting with pulmonary emboli: a review of two cases

Two patients with renal carcinoma presenting with pulmonary emboli are discussed. Pulmonary emboliform renal carcinoma may be more common than previously supposed. Evaulation for such tumours should be done in patients with pulmonary emboli of obscure origin.

BRIEF REPORT: SELECTIVE BREEDING FOR PRINCIPAL COMPONENTS AND FACTORS BASED UPON BEHAVIORAL TRAITS

This is the first of three reports of a taxonomic investigation of person- ality based on a matrix of 600 personality questionnaire items represented equally by marker items derived from the personality trait systems developed by J. P. Guilford and R. B. Cattell. This report outlines the entire prsject (Sells, Demaree, and Will, 1968) and focuses on the factor structure of the total matrix with particular concern for the relative contributions and relations of the two sources. The second report will analyze in detail the separate factor structures found in the Guilford and Cattell trait markers, while the third will summarize the final factor identification, based on analyses of the total matrix and matrices representing the Guilford and Cattell systems.

STATISTICAL AND PSYCHOMETRIC INFERENCE IN PRINCIPAL COMPONENTS ANALYSIS

Statistical inference applied to principal components analysis deals with estimating the parameters of the correlation matrix, R, found in the population, from the characteristics of the sample matrix, R*. On the other hand, psychometric inference refers to estimating the internal consistency of the components themselves, so that the decisions about retaining a component for further analysis can be based upon psychometric criteria. A slightly modified approach to statistical inference, which focuses upon the variance of the Components in the population, has been suggested. This viewpoint can be extended to estimating the true score variance and the reliabilities of the components in the population of subjects. Psychometric tests of significance can then be made statistical in nature.