Revised Bloom’s Taxonomy (2001)

 

Revised Bloom’s Taxonomy (2001)

In 1956, Dr. Benjamin S. Bloom, along with collaborators Max Englehart, Edward J. Furst, Walter Hill, and David Krathwohl, published a framework for categorizing educational goals titled Taxonomy of Educational Objectives, commonly known as Bloom’s Taxonomy.

A group of cognitive psychologists, curriculum theorists, instructional researchers, and testing and assessment specialists later revised Bloom’s original taxonomy. This revised version was published in 2001 under the title A Taxonomy for Teaching, Learning, and Assessment: A Revision of Bloom’s Taxonomy by David Krathwohl and Lorin Anderson.

Major Changes

• The names of the six major categories were changed from nouns to verbs, reflecting different forms of cognitive or thinking processes.

• The subcategories of the six major categories were also replaced by verbs, and some subcategories were reorganized.

• The Knowledge category was renamed to Remembering, as knowledge is considered an outcome or product of thinking, not a category of thinking itself.

• Comprehension and Synthesis were retitled as Understanding and Creating, respectively, to better reflect the nature of the cognitive processes involved.

Two Dimensions of the Revised Bloom’s Taxonomy

1. Knowledge Dimension – What students know

It represents the type of knowledge that learners are expected to acquire.

The revised taxonomy introduced a new Knowledge Dimension, expanding the categories from three to four.

A. Factual Knowledge

The basic elements that students must know to be acquainted with a discipline or to solve problems within it.

• Knowledge of terminology

• Knowledge of specific details and elements

B. Conceptual Knowledge

The interrelationships among basic elements within a larger structure that enable them to function together.

• Knowledge of classifications and categories

• Knowledge of principles and generalizations

• Knowledge of theories, models, and structures

C. Procedural Knowledge

How to do something — methods of inquiry and criteria for using skills, algorithms, techniques, and methods.

• Knowledge of subject-specific skills and algorithms

• Knowledge of subject-specific techniques and methods

• Knowledge of criteria for determining when to use appropriate procedures

D. Metacognitive Knowledge

Knowledge of cognition in general, as well as awareness and understanding of one’s own cognitive processes.

• Strategic knowledge

• Knowledge about cognitive tasks, including contextual and conditional knowledge

• Self-knowledge

2. The Cognitive Dimension (Process Categories and Cognitive Processes) - What students do

The original six categories were retained, but with several important changes: three were renamed, the order of two was interchanged, and all were converted to verb forms to align with learning objectives.

The six cognitive processes and their subcategories are as follows:

1. Remember: The ability to retrieve, recognize, and recall relevant information from long-term memory. This is the most basic level of cognition, where the learner does not need to understand, interpret, or use the information — only bring it back when prompted. Remembering includes recalling facts, definitions, dates, formulas, names, terms, sequences, etc. It forms the foundation for higher-order thinking,

• Recognizing: Identifying or locating knowledge in long-term memory that matches presented material. Eg: Recognizing the structure of mitochondria in a labelled diagram.

• Recalling: Retrieving relevant knowledge from long-term memory. Eg: Recalling the functions of cell organelles such as the nucleus or ribosome., Stating the equation of photosynthesis

2. Understand: The ability to construct meaning from information by interpreting, summarizing, explaining, comparing, or giving examples. At this level, the learner grasps the concept in their own words, showing that they can go beyond memorization. It involves linking new knowledge with prior knowledge and showing conceptual comprehension — understanding what something means and why it matters.

• Interpreting: Clarifying, paraphrasing, representing, translating, or changing from one form of representation to another. Eg: Explaining the meaning of a food chain diagram showing energy flow from producers to consumers., Translating a graph showing enzyme activity at different temperatures into a written explanation.

• Exemplifying: Illustrating or finding a specific example of a concept or principle. Eg: Giving an example of mutualism, such as bees pollinating flowers, Illustrating osmosis using the example of water movement in plant root cells.

• Classifying: Categorizing or determining that something belongs to a particular category.          Eg: Categorizing animals as vertebrates and invertebrates based on structural features, Sorting organisms into producers, consumers, and decomposers in an ecosystem.

• Summarizing: Abstracting or generalizing a theme or major points. Eg: Writing a brief summary of the process of photosynthesis, Summarizing the key stages of mitosis after observing cell division under a microscope.

• Inferring: Drawing logical conclusions, extrapolating, interpolating, or predicting from given information. Eg: Predicting the effect of removing predators on a forest food web, Drawing conclusions about the relationship between leaf structure and photosynthetic rate.

• Comparing: Contrasting, mapping, or detecting correspondences between two ideas or objects. Eg: Comparing the circulatory systems of fish and humans, Contrasting photosynthesis and respiration. 

• Explaining: Constructing meaning or a cause-and-effect model of a system. Eg: Explaining why stomata open during the day and close at night.

3. Apply: The ability to use knowledge, rules, theories, methods, or procedures in new but familiar situations. Here the learner moves from knowing what something is to knowing how to use it. Application may be procedural (doing steps, experiments, calculations) or conceptual (applying principles to a situation). Learning becomes active — students demonstrate they can perform or solve using what they know.

• Executing: Applying a procedure to a familiar task. Eg: Using a microscope to identify cell organelles in an onion peel, Applying the steps of the scientific method to test the effect of sunlight on plant growth

• Implementing: Using a procedure to solve an unfamiliar task. Eg: Designing an experiment to test how pH affects enzyme activity, Using the concept of natural selection to explain the evolution of antibiotic resistance

4. Analyze: The ability to break information into smaller parts to explore how they relate to one another and to the whole. It involves examining structure, patterns, assumptions, relationships, or causes. Students distinguish between facts and opinions, identify motives, find evidence, and make logical connections. At this level, the learner becomes a critical investigator rather than a receiver of information.

• Differentiating: Distinguishing relevant from irrelevant or important from unimportant parts of presented material. Eg: Identifying relevant factors influencing transpiration rate in a plant experiment.

• Organizing: Integrating, outlining, or determining how elements fit within a structure. Eg: Constructing a concept map showing the relationships between various organ systems in the human body.

• Attributing: Identifying the point of view, bias, values, or intent underlying presented material. Eg: Identifying the bias in a media article claiming that genetically modified foods are entirely harmful.

5. Evaluate: The ability to make judgments or decisions based on criteria and standards. It involves assessing reliability, comparing ideas, critiquing arguments, justifying decisions with evidence, and defending a position. Evaluation is not “just giving an opinion” — it requires reasoned judgment supported by logic, data, or standards.

• Checking: Detecting inconsistencies or fallacies within a process or product; determining internal consistency; evaluating the effectiveness of a procedure during implementation. Eg: Evaluating the consistency of results from repeated enzyme experiments.

• Critiquing: Judging or detecting inconsistencies between a product and external criteria; determining appropriateness for a given problem. Eg: Judging whether a proposed method for conserving endangered species is effective based on scientific principles.

6. Create: The ability to generate new ideas, products, or ways of understanding by combining existing knowledge in an original way. It is the highest level of cognition because it requires synthesis, imagination, design, planning, and innovation. Students reorganize elements into a new structure, propose original solutions, design experiments, write new content, or invent new models.

• Generating: Coming up with alternative hypotheses or ideas based on criteria. Eg: Formulating a hypothesis on how changes in light intensity might affect the rate of photosynthesis in aquatic plants, Suggesting possible explanations for the sudden decline of a frog population in a local pond 

• Planning: Designing or devising a procedure for accomplishing a task. Eg: Designing an experiment to study the effect of different fertilizers on plant growth.

• Producing: Constructing or inventing a product. Eg: Developing a working model showing the human respiratory system and its functions, Creating a digital presentation or short documentary explaining the impact of deforestation on ecosystem balance.