Literature on conditioned stimulus intensity effects is briefly reviewed and one experiment presented with human subjects and a video-game method. The intensity (Bright or Dim) or color (Red or Blue) of a cue that predicted the appearance of a spaceship was manipulated. Testing was conducted with either the alternate brightness or the alternate color. Responding to the cue was unaffected by its intensity in training. During testing, a downshift in brightness decreased responding while an upshift had no effect, suggesting an asymmetrical intensity gradient. Red tended to condition better than Blue in the first phase, but the same participants conditioned better in the second phase to Blue. The results are discussed with respect to prior demonstrations of intensity effects using within-subject designs and favor an explanation based on stimulus-sampling theory.

中文翻译：

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人类线索结果学习中的强度效应

简要回顾了有关条件刺激强度效应的文献，并介绍了一项以人类受试者和视频游戏方法进行的实验。预测宇宙飞船外观的线索的强度（明亮或暗淡）或颜色（红色或蓝色）被操纵。使用交替亮度或交替颜色进行测试。对提示的反应不受其训练强度的影响。在测试过程中，亮度的下移会降低响应，而上移则没有效果，这表明强度梯度不对称。红色在第一阶段的状态往往比蓝色好，但相同的参与者在第二阶段对蓝色的状态更好。