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Students’ knowledge of scientific principles of evolution is often inadequate, despite its recognized importance for understanding biology. Moreover, difficulties associated with underlying abstract concepts such as randomness and probability can hinder successful learning of evolutionary concepts. Studies show that visualizations, particularly simulations together with appropriate instructional support, facilitate the learning of abstract concepts. Therefore, we have developed interactive, web-based simulation software called EvoSketch in efforts to help learners grasp the nature and importance of random and probabilistic processes in evolutionary contexts. We applied EvoSketch in an intervention study comparing four self-directed study conditions: learning with EvoSketch (1) alone, (2) combined with interpretative support, (3) combined with reflective support, and (4) using texts about randomness and probability instead of EvoSketch. All conditions received no support from any instructors. Knowledge about evolution as well as randomness and probability in the context of evolution, time-on-task, and perceived cognitive load were measured. A sample of 269 German secondary school students (Mage = 15.6 years, SD = 0.6 years) participated in the study.

evolution

EvoSketch: Simple simulations for learning random and probabilistic processes in evolution, and effects of instructional support on learners’ conceptual knowledge