Those items either had negative correlation and/or low correlation, were too easy or too difficult, did not distinguish between age groups and/or did not show increased knowledge with increased age.
Þau atriði voru ýmist með neikvæða fylgni og/eða of lága fylgni við prófþátt, voru of létt eða of þung, voru ekki aldursgreinandi og/eða sýndu ekki vaxandi getu með hækkandi aldri.