Burkholder J, Deitchman R, Haude R H, Sanders R E
Percept Mot Skills. 1975 Oct;41(2):523-9. doi: 10.2466/pms.1975.41.2.523.
54 male CD strain Charles River albino rats were tested for complexity preference using a non-locomotor response. Each subject was presented an array of photographic slides containing an incremental series of complexity elements, i.e., 1, 2, 5 and 25 elements. All photographic slides were randomized both within and across subjects. Each photographic slide of each level of complexity was repeated three times. Results of an analysis of covariance, with luminance as the covariate, showed that cummulative viewing time increased with an increase in stimulus complexity. The relationship between looking and level of complexity was shown to be different when covariance procedures were used than without them.
使用非运动反应对54只雄性CD品系查尔斯河白化大鼠进行了复杂性偏好测试。向每个受试大鼠展示一系列包含递增复杂性元素（即1、2、5和25个元素）的幻灯片阵列。所有幻灯片在受试大鼠内部和之间均进行了随机排列。每个复杂性水平的每张幻灯片重复展示三次。以亮度作为协变量的协方差分析结果表明，累积观看时间随着刺激复杂性的增加而增加。使用协方差程序时，观看与复杂性水平之间的关系与不使用协方差程序时不同。
