Which word describes a person who has a great deal of knowledge about or skill in a specific subject?

• A. Practitioner
• B. Expert
• C. Novice
• D. Amateur

Answer: (B)

Having a great deal of knowledge or skill in a specific subject means being an expert. An expert is someone regarded as a master in that field, able to understand and explain complex ideas, make sound judgments, and perform tasks at a high level. A practitioner focuses on applying skills in real work and isn’t necessarily defined by deep theoretical knowledge. A novice is just starting out, with little experience. An amateur engages for interest and may not have professional status. Because the emphasis is on deep knowledge and recognized mastery, expert is the precise term to describe such a person. For example, an expert in neuroscience can interpret challenging research findings with clarity.