How Do Personality Tests Predict Job Performance

Does a personality test do a good job of predicting job performance according to the research on validity of selection we studied?

Personality tests have become a staple in the modern hiring process and are increasingly used by companies to predict how well a candidate will perform in a job role. By mapping specific personality traits to key performance indicators, organizations aim to identify the individuals who are most likely to thrive in a given position. However, the relationship between personality and job performance is complex, varying from one role to another. In this comprehensive analysis, we’ll explore how personality tests are designed to forecast job performance, the empirical evidence supporting their use, and how they can differ in predicting outcomes based on the job position.

The Structure of Personality Tests

Before delving into how these tests predict performance, it’s crucial to understand their basic structure. The Big Five (Five Factor Model) is one of the most commonly used frameworks in personality testing and includes the dimensions of Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism (OCEAN). Each dimension is a continuum where an individual can score low, medium, or high.

  1. Openness: Measures the extent to which a person is open to new experiences, values, and ways of thinking.
  2. Conscientiousness: Evaluates how organized, reliable, and hard-working a person is.
  3. Extraversion: Assesses the degree to which a person is outgoing, social, and energetic.
  4. Agreeableness: Measures how cooperative, compassionate, and kind a person is.
  5. Neuroticism: Evaluates emotional stability and how well a person handles stress.

Theoretical Foundations

According to the Trait Activation Theory (TAT), the traits measured by personality tests are more likely to be “activated” in situations that call for them. For example, a highly conscientious person will be more productive in a structured environment. Similarly, someone scoring high on extraversion may excel in a role requiring social interactions. Thus, TAT provides the foundational logic for why personality traits may predict job performance.

Empirical Evidence

Research has consistently found certain personality traits to correlate with job performance. Conscientiousness is often cited as the most reliable predictor across a variety of job roles, followed by emotional stability (the opposite of neuroticism). Some studies also suggest that different combinations of the Big Five traits can predict job performance more accurately for specific roles.

Sales Positions

In sales, extraversion is a significant predictor of performance. Sales roles often require employees to be outgoing, confident, and effective in social situations. A meta-analysis of studies linking personality traits to sales performance found that extraversion, followed by conscientiousness, was most predictive of high sales numbers.

Leadership Roles

For managerial and leadership positions, emotional stability and conscientiousness have been found to be the most effective predictors. These roles require long-term planning, decision-making, and the ability to handle stress, which are all associated with these traits.

Creative Roles

In creative positions such as designers, writers, or artists, openness to experience is highly valued. This trait correlates with original thinking, a wider range of interests, and a willingness to experiment—all key elements in creative endeavors.

Service Industry

In the service industry, agreeableness is crucial. Roles like customer service representatives or nurses require individuals to be cooperative, compassionate, and good at working with people.

Limitations and Criticisms

While personality tests offer valuable insights, they are not without limitations. Critics argue that:

  1. Not Comprehensive: Personality tests may not capture the full range of human behavior or situations in which a person may excel or falter.
  2. Social Desirability Bias: Candidates might choose answers they believe employers want to hear.
  3. Cultural Bias: The tests may not be applicable across diverse cultures.

Customization by Job Position

Given the variation in job requirements, some companies are developing customized personality tests tailored for specific roles. By identifying the traits that matter most for a particular job and weighting those more heavily in the assessment, these customized tests aim to improve the prediction accuracy.

Personality Traits

The fascinating study of human behavior and characteristics is a rabbit hole that never seems to end. 


Personality tests serve as a useful tool in the hiring process, but they are not a one-size-fits-all solution. Their efficacy varies by job position and the specific traits that are most relevant to that role. Organizations can harness the predictive power of these tests by aligning them more closely with the performance indicators relevant to specific positions. While it’s important to note that personality tests are just one element in the comprehensive assessment of job performance, they offer an empirical way to assess how well a candidate is likely to fit in a particular role.

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