Huckle Co., Ltd., Japan.
Aichi Bunkyo University, Japan.
J Exp Anal Behav. 2022 Nov;118(3):412-424. doi: 10.1002/jeab.794. Epub 2022 Aug 21.
Effects of delays of reinforcement on zebrafish behavior were examined following training with immediate reinforcement. The delay was either signaled by an exteroceptive stimulus present for the entire delay period (fully signaled), signaled briefly only at delay onset (partial signal), or without a stimulus (unsignaled). Unsignaled delays consistently resulted in low response rates. Fully signaled delays resulted in higher response rates than unsignaled delays when the delay was 3 s, but this difference in response rates disappeared at 6-s delays. Partially signaled delays were less effective in maintaining responding than fully signaled delays, but more effective than unsignaled delays, although these results were only suggestive. These results indicate that stimulus changes that occur during delays to reinforcement have similar effects with zebrafish as with other species, but also that responding of zebrafish has a relatively low tolerance to the delay duration. A vast majority of experiments examining zebrafish behavior suggests that the fish have potential to serve as an interface between biological and behavioral science, but this may not be the case in some research areas involving delays, such as delay discounting.
在进行即时强化训练后，研究了强化延迟对斑马鱼行为的影响。延迟要么由整个延迟期间存在的外部刺激来指示（完全信号），要么仅在延迟开始时短暂指示（部分信号），要么没有刺激（无信号）。无信号延迟始终导致低反应率。当延迟为 3 秒时，完全信号延迟导致的反应率高于无信号延迟，但在 6 秒延迟时，这种反应率的差异消失了。部分信号延迟在维持反应方面的效果不如完全信号延迟，但比无信号延迟更有效，尽管这些结果只是提示性的。这些结果表明，强化延迟期间发生的刺激变化对斑马鱼的影响与其他物种相似，但斑马鱼的反应对延迟持续时间的容忍度相对较低。绝大多数研究斑马鱼行为的实验表明，鱼类有可能成为生物和行为科学之间的接口，但在涉及延迟的某些研究领域，如延迟折扣，情况可能并非如此。
