By Amy E. Feldman

PHILADELPHIA (CBS) – Can a company legally require you to take a personality test – and then not hire you because of it?

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A study published in the Journal of Applied Social Psychology found a person’s Facebook profile can reveal – with strong accuracy – what kind of employee a person will make. Based on a personality rating scale, employers can learn about your conscientiousness, extroversion, and agreeableness.

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Despite the free look into a potential employee’s mindset, many employers actually go the complicated and expensive way to find out: they conduct personality tests before hiring someone. Is that legal?

Unless a pre-employment personality test seeks information about a mental or physical impairment, employers may use them to determine whether an applicant will be a good fit for the job. An employer can’t ask questions that focus on the existence or extent of a disability, but are well within their legal rights to use them to determine whether an individual’s traits are compatible with either the job requirements or corporate culture.

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Some dispute the accuracy of personality tests – and also their necessity, particularly in light of Facebook profiles that discuss a jerky boss right there. But employers who choose to determine common sense based on a Myers Briggs, predictive index, or other test rather than looking at a picture of an applicant with funnel in hand, are allowed to do so.