Yerkes and dodson varied the intensity of the shock : some rats always got a ferocious zap , other rats always got a mild buzz .
耶基斯和多德森不断变化着电击强度：一些老鼠总遭到强烈的电击，而另一些老鼠的电击总是很微弱。
Dr lisa parr , who works with chimps at the yerkes primate center at emory university in atlanta , us , described the research as " ground-breaking " .
They couldn 't guess what was in the potion , but then , they didn 't have the benefit of dr. young 's research with prairie voles at the yerkes national primate research center at emory university .
Another turning point in richard 's life followed his introduction to bobby yerkes , the stunt coordinator for the " wonder woman " television series who also trained celebrities for the show " circus of the stars . "
It gives strong evidence that ape and human laughter are related through evolution , said frans de waal of the yerkes national primate research center at emory university in atlanta .
