Quantitative models of Pavlovian conditioning.

Over the last few years, research on learning and memory has become increasingly interdisciplinary. In the past, theories of learning, as a prerogative of psychologists, were generally formulated in purely verbal terms and evaluated exclusively at the behavioral level. At present, scientists are trying to build theories with a quantitative and biological flavor, seeking to embrace more complex behavioral phenomena.

[Infantile colic incidence and associated risk factors: a cohort study].

Objective: To assess the incidence of infantile colic and its determinants.

Methods: Between May and July 1999, the research team performed daily visits to the three main maternities of Pelotas. All women were interviewed after the delivery and their infants were targeted for follow-up at three months.