It is important to note that there have only been two published studies on the NZART to date (Lichtwark et al., 2013; Starkey & Halliday, 2011).
Further validation of the New Zealand Test of Adult Reading (NZART) as a measure of premorbid IQ in a New Zealand sample.
Development of the New Zealand Adult Reading Test (NZART): Preliminary findings.
New Zealand Adult Reading Test (NZART) (Starkey & Halliday, 2011).
The participants' responses were audio recorded during the administration of the NART and NZART for scoring purposes (after gaining permission from the participant).
Because the NART and the NZART share 56% of their words there was the possibility of a learning effect which could result in a higher estimation of IQ from the second measure administered.
Two NZART formulae are used: the formulae developed by Starkey and Halliday (2011), the [NZART.sub.WASI]; and the formula developed in the current study, based on WAIS-IV ([NZART.sub.WAIS]).
The first section describes the development of the regression equations based on the WAIS-IV The next section summarises the performance of the participants on the WAIS-IV, NART and NZART and compares the performance across gender and ethnicity using independent t-tests (due to unequal group sizes it was not possible to conduct a 2-way ANOVA).
After this participants completed the NART, NZART and the WASI.
The WASI and the NART were scored according to published guidelines, for the NZART the total number of incorrect responses were noted.
This is followed by an examination of the relationship between current IQ, NART and NZART error scores (using correlations).
To examine the relationship between the reading tests and current IQ, correlations were conducted between the NART and NZART error scores and WASI IQ scores.