Assessing the relationship among Defining Issues Test scores and crystallised and fluid intellectual indices

Differing findings exist on how Defining Issues Test (DIT) scores relate to intelligence. Further study is needed in order to address aspects of intellect not previously considered and to address how these relationships rival studies that have compared indices of intellect with constructs similar to DIT scores. In the present study, a sample of 117 participants completed the DIT and the Kaufman Adolescent and Adult Intelligence Test (KAIT), which assesses crystallised and fluid intelligence. Structural equation modelling offered supporting evidence that these measurements represent separate sources of information. Statistically significant paths from KAIT crystallised indices to DIT scores were seen, though there was much overlap. Negligible paths were seen from KAIT fluid indices to DIT scores in the sample overall though this relationship strengthens when advanced moral judgement development is considered. Thus, the present study affirms the DIT's construct validity and illustrates how crystallised and fluid intellectual abilities pertain to DIT scores.