Who researched the varying levels of understanding in learner assessments?

The research conducted by Bloom focused on the varying levels of understanding and cognitive processes involved in learning, which is foundational for learner assessments. His well-known taxonomy, Bloom's Taxonomy, provides a hierarchical framework for categorizing educational goals and objectives. It classifies learning outcomes into different levels of cognitive skills, from lower-order thinking (like remembering and understanding) to higher-order thinking (like analyzing, evaluating, and creating). This framework has been widely adopted in education for assessing student learning and designing curriculum, allowing educators to align assessments with intended learning outcomes appropriately.

While Gardner is known for his theory of multiple intelligences, Skinner's work mainly revolves around behaviorism and operant conditioning, and Piaget focused primarily on cognitive development stages in children. Their contributions, while significant in their areas, do not directly relate to the systematic analysis of understanding in learner assessments as Bloom's work does.