In some personality tests they try to build Validity Scales into the questions and make it part of the scoring algorithm https://en.wikipedia.org/wiki/Validity

In some personality tests they try to build Validity Scales into the questions and make it part of the scoring algorithm https://en.wikipedia.org/wiki/Validity_scale https://en.wikipedia.org/wiki/Validity_scale https://en.wikipedia.org/wiki/Minnesota_Multiphasic_Personality_Inventory#Validity_scales https://en.wikipedia.org/wiki/Minnesota_Multiphasic_Personal... I think the basic technique is to ask similar but different questions in several different ways and then apply stats