Learning scientists often use Donald Stokes’s influential characterization of the relation between basic and applied research in his book Pasteur’s Quadrant to suggest that most of the work in the learning sciences lies, or should lie, at the intersection of both types of research, that is, in the cell that is epitomized by Pasteur’s work (use-inspired basic research) rather than the cells epitomized by either Bohr (pure basic) or Edison (pure applied). This essay makes three points: (a) Stokes had a broader view that also considered the temporal flow between and among the different cells in his famous diagram; (b) Stokes argued against the relative valuation of either type of research (basic or applied); and (c) the learning sciences currently contain exemplars of all four of the cells in Stokes’s famous 2 × 2 matrix, and this diversity has enriched the field, and can continue to do so, as long as work in Pasteur’s quadrant is not viewed as the only worthwhile type of learning sciences research.

学习型科学家经常在他的《巴斯德象限》一书中使用唐纳德·斯托克斯（Donald Stokes）对基础研究与应用研究之间关系的有影响力的表征暗示学习科学中的大部分工作都位于或应该位于两种类型研究的交叉点，即巴斯德的工作（以使用为灵感的基础研究）所代表的细胞，而不是所代表的细胞由Bohr（纯净版）或Edison（纯净版）提供。本文提出三点：（a）斯托克斯的视野更广，他的著名图中还考虑了不同单元之间的时间流；（b）斯托克斯反对任何一种研究（基本研究或应用研究）的相对估值；（c）学习科学目前包含斯托克斯著名的2×2矩阵中所有四个单元的样本，并且这种多样性已经丰富了该领域，并且可以继续这样做，只要不将巴斯德象限中的工作视为唯一有价值的学习科学研究类型。