Personality is not necessarily a stable, measurable individual trait

In fact, it's up for debate whether personality is a stable, measurable feature of an individual at all.Part of the problem is the way the tests are constructed.Each is based on a different set of metrics to define personality:the Myers-Briggs, for instance,focuses on features like introversion and extroversion to classify people into personality types,while the Big Five scores participants on five different traits.Most are self-reported,meaning the results are based on questions participants answer about themselves.