Some Difficulties in Research into Cell Motile Activity under Isotropic Conditions

Some difficulties in research into cell motile activity under isotropic conditions.

Movement of Dictyostelium discoideum amoebae under isotropic and anisotropic conditions was recorded and analysed with computer-aided methods and the results are presented in various manners as described in the subject literature. Cell movement under isotropic conditions showed great diversity. Some cells moved almost in a straight path whereas others in close proximity turned around with littl...

Some investigations on cell behavior under various conditions; a review.

Some difficulties in interpreting psychophysiological research with children.

Mona El-Sheikh and her colleagues have assembled an impressive series of studies for this monograph. To date, researchers interested in the consequences of marital conflict on children have focused primarily on the main effects of psychological variables. Although these studies have been invaluable in helping us to better understand risk and resiliency factors associated with children’s exposur...

Some methodological reflections on the difficulties of psychoanalytic research.

AUTHOR’S NOTE: Revised and expanded version of a paper read at a joint session of the Division of Experimental Psychology and the Society for Projective Techniques, seventy-fourth annual convention of the American Psychological Association at New York City, September 6, 1966 (see American Psychologist, 21 (1966), 701). The present version is appearing as part of a symposium in Psychological Iss...

Some Pathological Regression Asymptotics under Stable Conditions

We consider a simple through-the-origin linear regression example introduced by Rousseeuw, van Aelst and Hubert (1999). It is shown that the conventional least squares and least absolute error estimators converge in distribution without normalization and consequently are inconsistent. A class of weighted median regression estimators, including the maximum depth estimator of Rousseeuw and Hubert...