Psychology: Aptitude, Interest and Job Requirement: Ability, Mental Age and IQ (For CBSE, ICSE, IAS, NET, NRA 2022)

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Aptitude, Interest and Job Requirement


An aptitude therefore is a special potential in a certain field of performance. It indicates a special ability, acquired or innate, to learn or develop knowledge of a skill in some specific area. It involves prediction of the probability of success of a person with training in a certain type of work/job/vocation.


Interest may be defined as a tendency to choose one activity in preference to another, or to seek out an activity or object. It implies preferences or likes and dislikes for specific activity or a group of specific activities such as lawyer, physician, engineer, musician, artist etc. Interest is generally manifested in the way one likes to spend one՚s leisure time.


Ability, commonly known as intelligence, represents one of the most important sources of individual differences. Ability is the innate capacity to act and helps in the solution of a problem.

Mental Age and IQ

Mental ability is developmental in nature. It increases with age. Intelligence Quotient (IQ) is a ratio of mental age and chronological age multiplied by 100.

IQ = MA/CA × 100

Importance and Relationship Among Aptitude, Interest and Ability

The data from interest inventories should be supplemented by ability and aptitude tests as well as with individual՚s attitude towards occupational experiences, co-curricular activities or recreational pursuits.

Analyzing and Communicating Job Requirement

Job requirements include information about the nature of work, salary, work conditions, timings, and also about the abilities, aptitude and interest required for success in the job.

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