Prospective duration judgments: The role of temporality and executive demands of concurrent tasks

It is known that concurrent non-temporal tasks shorten reproduced temporal durations in prospective duration judgments. Two experiments were carried out, one comparing a concurrent temporal task to a minimally demanding concurrent task (Experiment 1) and one comparing an executive concurrent (Simon) task with a less demanding non-executive concurrent task (Experiment 2). An effect of the concurrent task type on temporal reproductions was found. Furthermore, a duration length effect was found, where longer durations were underestimated more than shorter durations. This effect tended to be stronger for the experiments that included a concurrent task that demanded high attention.     

Effects of Early Maternal Separation on Subsequent Reproductive and Behavioral Outcomes in Male Rats

To investigate effects of maternal separation on reproductive and behavioral outcomes, male Wistar rats were separated from their mothers daily for 3 hr (maternal separation; MS) or 0 hr (control) from postnatal day (PND) 1 to 14. Timing of puberty, reproductive parameters, hormone levels, and aggressive behaviors in juvenile and adult rats were examined. Contrary to expectations, there was no effect of maternal separation on any measure of aggression. However, maternal separation altered peripubertal testosterone secretion and increased mean day of preputial separation. In addition, adult MS males demonstrated less total sexual behavior. There was no difference in sperm counts or testosterone levels at necropsy on PND 56 or in adulthood, but seminal vesicle weights were increased in adult MS rats. These results suggest that early life stress may influence hypothalamic-pituitary-gonadal axis development in males, at least during peripuberty.     

Modulation of aggression toward an intruder during the reproductive cycle of white king pigeons (columba livia)

For three of four mated male pigeons, intrusion of a still, two-dimensional image of a conspecific into the reproductive situation initiated aggressive behavior over months of daily testing with little habituation. There was a transient increase in aggressive contacts against the head of the target within two days prior to or following the occurrence of the second egg. Such an increase did not occur with extended daily testing of the male alone and was more closely synchronized to egg laying than time since the introduction of the female. The results are consistent with previous studies of reproductive and schedule-induced aggression in birds.     

The Seminal Contribution of Rabbi Moshe Feinstein to the Development of Modern Jewish Medical Ethics

The purpose of this essay is to show how, on a wide variety of issues, Rabbi Moshe Feinstein broke new ground with the established Orthodox rabbinic consensus and blazed a new trail in Jewish medical ethics. Rabbi Feinstein took power away from the rabbis and let patients decide their treatment, he opened the door for a Jewish approach to palliative care, he supported the use of new technologies to aid in reproduction, he endorsed altruistic living organ donation and recognized brain death (thus laying the groundwork for Orthodox Jewish acceptance of heart transplantation), he downplayed the value of social worth in triage decisions, and was a fierce defender of the rights of the fetus. I develop broader theological principles from Rabbi Feinstein's ethical positions and compare them to those of his Jewish and Christian contemporaries.