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Expert
An expert is someone who has a prolonged or intense experience through practice and education in a particular field. Informally, an expert is someone widely recognized as a reliable source of technique or skill whose faculty for judging or deciding rightly, justly, or wisely is accorded authority and status by peers or the public in a specific well-distinguished domain. An expert, more generally, is a person with extensive knowledge or ability based on research, experience, or occupation and in a particular area of study. Experts are called in for advice on their respective subject, but they do not always agree on the particulars of a field of study. An expert can be believed, by virtue of credential, training, education, profession, publication or experience, to have special knowledge of a subject beyond that of the average person, sufficient that others may officially (and legally) rely upon the individual’s opinion. Historically, an expert was referred to as a sage (Sophos). The individual was usually a profound thinker distinguished for wisdom and sound judgment.
In specific fields, the definition of expert is well established by consensus and therefore it is not always necessary for individuals to have a professional or academic qualification for them to be accepted as an expert. In this respect, a shepherd with 50 years of experience tending flocks would be widely recognized as having complete expertise in the use and training of sheep dogs and the care of sheep. Another example from computer science is that an expert system may be taught by a human and thereafter considered an expert, often outperforming human beings at particular tasks. In law, an expert witness must be recognized by argument and authority.
Research in this area attempts to understand the relation between expert knowledge, skills and personal characteristics and exceptional performance. Some researchers have investigated the cognitive structures and processes of experts. The fundamental aim of this research is to describe what it is that experts know and how they use their knowledge to achieve performance that most people assume requires extreme or extraordinary ability. Studies have investigated the factors that enable experts to be fast and accurate.
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Expert (adjective)
Extraordinarily capable or knowledgeable.
“I am expert at making a simple situation complex.”
“My cousin is an expert pianist.”
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Expert (adjective)
Characteristic of an expert.
“This problem requires expert knowledge.”
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Expert (noun)
A person with extensive knowledge or ability in a given subject.
“We called in several experts on the subject, but they couldn’t reach an agreement.”
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Expert (noun)
A player ranking just below master.
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Proficient (adjective)
Good at something; skilled; fluent; practiced, especially in relation to a task or skill.
“He was a proficient writer with an interest in human nature.”
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Proficient (noun)
An expert.
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Proficient (adjective)
competent or skilled in doing or using something
“I was proficient at my job”
“she felt reasonably proficient in Italian”
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Proficient (noun)
a person who is proficient
“he became a proficient in Latin and Greek”