Wright A A, Delius J D
Graduate School of Biomedical Sciences, University of Texas Health Science Center at Houston.
J Exp Psychol Anim Behav Process. 1994 Jan;20(1):108-12.
Two groups of 4 pigeons learned either matching-to-sample or oddity-from-sample by digging in white and black gravel for buried grain. Learning occurred as early as Trial 11, and acquisition was accelerated by as much as 100-fold compared with learning in traditional key-peck environments. Control experiments showed that performance was not controlled by cues other than the gravel stimuli and was not due to distributed practice effects of 8 trials per day and longer intertrial intervals.
两组各4只鸽子通过在白色和黑色砾石中挖掘埋藏的谷物来学习样本匹配或样本奇异性辨别。早在第11次试验时就出现了学习，与在传统啄键环境中的学习相比，习得速度加快了多达100倍。对照实验表明，表现不受砾石刺激以外的线索控制，也不是由于每天8次试验和更长的试验间隔的分散练习效应。
