This document, presented at a symposium on violence and aggression in America, reports a longitudinal study of environmental influences in the development of aggressive behavior. Subjects were 875 third graders when originally assessed with a peer nomination technique in 1960. High, moderate, and low degrees of aggression were identified in the population, and information was collected on the f...

Many aspects of octopus growth dynamics are poorly understood, particularly in relation to sub-adult or adult growth, muscle fibre dynamics and repro-somatic investment. The growth of 5 month old Octopus pallidus cultured in the laboratory was investigated under three temperature regimes over a 12 week period: seasonally increasing temperatures (14-18°C); seasonally decreasing temperatures (18-...

Cell-free extracts of Clostridiiumii p(lste'rtr'i lm il (8) aind( of A2otoboctcr viiell(tlfdii (2) in the presence of an ATP generating system alndI anl appropriate electron donior, catalvze the redcuction of N. gas to ammonia. In recent investigations (3,4, 9) of the properties of nitrogenase from these organiisms, it has been established that the enzyme system is non-specific for electron acc...

EF01/PC01 Plus Postage. *Anxiety; Elementary Secondary Education; *Factor Structure; Individual Characteristics; *Personality Tests; *Test Construction; *Test Validity *Childrens Manifest Anxiety Scale; Construct Validity; *What I Think and Feel The factor structure, and therety the underlying construct of the What I Think and Feel Test (RITE) was determined. The delireaticn of subscales of anx...

Two groups of retarded adolescents were presented sets of multiple verbal directions (imperative sentences). One group was exposed to pictures illustrating the objects and action of each direction in addition to the verbal directions. Subjects were required to carry out performances demanded by the directions. The direction-following behavior of the Verbal Picture Group was found to be signific...

In species with time!limited opportunities for insemination\ precopulatory mate!guarding is expected to coevolve with the duration of female reproductive cycles[ Despite this adaptation to female characteristics\ it may also be advan! tageous for males to adjust the duration of guarding with respect to sex ratio because the bene_ts of guarding are dependent on the availability of females[ If fe...

16 Emerging research has highlighted the importance of leptin in fetal growth and development, 17 independent of its essential role in the maintenance of hunger and satiety through the modulat 18 ion of neuropeptide Y and proopiomelanocortin neurons. Alterations in maternal-placental-fet 19 al leptin exchange may modify the development of the fetus and contribute to the increased ri 20 sk of de...

Context In 1969, Ghana became one of the first African countries to adopt a population p o l i c y. Acceptance of family planning was s l o w, however, and 20 years later, in 1988, the prevalence of modern contraceptive use had reached only 5%. Between 1988 and 1998, though, the use of modern contraceptive methods nearly tripled, fro m 5% to 13%. At the same time, the total fertility rate dropp...

Yunxiang Yan, Planning birth: changes in fertility culture in a Chinese village This article examines how ordinary villagers made theirchildbearing choices and strategized fertility desireswhen they were facing an unprecedented intrusion intothe private life sphere by a powerful state. In theirresponse to the birth control program many villagers hadtranscended the traditiona...

C ABSTRACT The purpose of this investigation was to test whether the or system model was more adequate to account for the relati:',Iit.138 among subskills in normal and disabled readers. Thirty-i..ight subjects were divided into three groups._There were 19 disabled subjects with a mean chronological age of 9.17, a mean IQ of 104.84, and a mean reading level of 1.80. Ten normal-old subjects were...