In order to examine the psychometric characteristics of
the English version of the TGCT the data obtained from the
administrations were analysed. Item discrimination indices
were found to be between 0.31 and 0.67. Item difficulty indices
showed a wide distribution between 0.11 and 0.74, which
contribute to measuring differences. The average of item
difficulty values was found to be around 0.50. Bernbachs
alpha reliability coefficient of the English version of the TGCT
was found to be 0.82. Consequently, the results of item and
test analyses showed that items functioned-well and that there
was no need for modifications.