Validity is concerned with the extent to which an assessment instrument actually measures what it is designed to measure. It implies comparison between the assessments and some external criteria. Reliability is concerned with the consistency of assessments.

PeopleMaps is a Jungian profile designed to measure personality. The measures used are Jung’s rational and irrational preference scales, together with his Extraverted and Introverted attitude scales.

That the profile has measured personality accurately is confirmed by the respondents face validity of 80% and above. Hundreds of thousands of people have contributed to these findings, which also confirms reliability.

Profiling that is not Jungian based will normally be norm referenced, i.e. discriminating between individuals.

The questionnaire provides an Ipsative assessment, which means that responders must choose a response from a selection of four. Most and Least and the other two questions must also be given a weighting. (This differs from other Ipsative assessments, which only measure Most and Least and thereby lose accuracy.)