Beck J, Chmielewska J
Acta Neurobiol Exp (Wars). 1976;36(5):535-43.
The bar-press response reinforced by the contact with estrus female was investigated in growing male rats. The bar-press latency as well as the subjects' behavior changed distinctly in the course of the study with the increase of experience and maturation of the subjects. Some behavioral items such as, nasogenital contact, climbing on the head, and running around showed gradual increase during succeeding weeks of life, parallelly to the decrease of the sitting under female, and crawling under female. A gradual shortening of the bar-press latencies was observed from the 4th to the 11th week of life succeeded by a prolongation from the 11th to the 14th week. On the basis of the changes in bar-press latencies as well as of the analysis of the subjects' behavior it is suggested that the young male rat between the 4th and 7th week of life comes under an increasing influence of sexual motivation.
在生长中的雄性大鼠中，研究了与处于发情期的雌性接触所强化的压杆反应。随着研究过程中大鼠经验的增加和成熟，压杆潜伏期以及大鼠的行为发生了明显变化。一些行为项目，如鼻生殖器接触、爬上头部和四处奔跑，在随后的几周内逐渐增加，与此同时，在雌性大鼠下方坐着和在雌性大鼠下方爬行的行为则减少。从出生后第4周到第11周，观察到压杆潜伏期逐渐缩短，随后从第11周到第14周延长。根据压杆潜伏期的变化以及对大鼠行为的分析，表明出生后第4至7周的幼年雄性大鼠受到性动机的影响越来越大。
