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Two experiments examined the conditions under whichBetta agonistic responding occurs by manipulating physical space and the species and social responsiveness of an opponent. In Experiment 1, both the species (conspecific or nonconspecific) and the aggressiveness (aggressive or nonaggressive) of the opponent were manipulated. The results indicated that agonistic behavior was greater with both conspecifics and aggressive opponents. Experiment 2 examined the effects of physical space and social responsiveness of the opponent on intraspecific aggressive behavior. An inverse relationship was found between physical space and the number of attacks directed toward the opponent. The results of both experiments also indicated thatBetta tend to attack aggressive opponents more than nonaggressive ones. It is suggested thatBetta aggress either when the individual animal is threatened or when physical space is limited. 相似文献
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Constance A. Flanagan 《Child development》1990,61(1):163-177
The interactions of parental work status, family integration, and sex of child on parent-adolescent decision making were examined in a 4-wave study of 504 adolescents and their mothers. 3 work status groups were compared. Deprived families reported a layoff or demotion at Time 1 and no recovery by Time 4. Recovery families reported similar work status losses at Time 1 and reemployment by Time 4. Nondeprived families reported stable employment at both times. Adolescents in deprived households, especially boys, reported the highest conflict with parents. Adolescents in recovery families reported high conflict when parents were unemployed, but levels declined when parents were reemployed. According to mothers, daughters in deprived households enjoyed the highest level of autonomy of any adolescent group. 相似文献
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The effects of change in parental work status on early adolescents' school adjustment before and after the transition to junior high school were examined in a 2-year longitudinal study. Data were gathered from 883 adolescents, their mothers, and teachers. Based on patterns of change or stability in parental work status during the 2 years of the study, 4 groups were compared: deprived, declining, recovery, and stable families. With parents' education controlled, teachers said that adolescents in deprived and declining families were less competent than their peers in stable or recovery families. In addition, adolescents whose parents experienced a decline in work status were the most disruptive in junior high school. While most students had difficulty adjusting to junior high school, the transition was particularly difficult for those students whose parents were simultaneously dealing with changes in work status. 相似文献