test retest reliability is when retesting gives you the same or a similar score on subsequent sittings.

of course test retest reliability should be balanced with sensitivity to change over time.

personally... i'm dubious about the utility of the test.

people post here 'cause they know they have mental health issues already.

people who post here typically have psychologists / psychiatrists / councellors already.

i'm concerned about people 'making up tests' especially when... they aren't really qualified to make up reliable and valid tests... are they? i'm also dubious about the attempt to operationalise and test the construct 'sanity'. still... going with the unscientific construct 'sanity' means that one doesn't have to worry about conflicting with tests that have already been constructed to test for actual psychological / psychiatric conditions, i suppose... there certainly isn't a consensus on an operational definition of 'sanity' and i don't suppose there is even inter-rater reliability for judgements as to whether a person is 'sane'.

one might as well design a test for 'witchcraft'. i mean... one is of course free to operationally define a term however one wants to... its utility with respect to capturing interesting phenomena in the world, on the other hand...

i mean... people post here because they are worried about their mental health already. the test is supposed to... what? tell them they should worry more / less / much the same? why on earth should they worry more / less / much the same? a high score is correlated with... what, precisely?????