Age was significantly related to the WAISIV PRI, and TOPF raw scores (with and without the discontinue rule applied).
Bivariate correlations were conducted to examine the relationships between scores on the TOPF and scores on the WAIS-IV (Table 4).
The results indicate that the TOPF is not appropriate for predicting current WAIS-IV performance amongst Maori.
Not applying the discontinue rule generated slightly stronger correlations between the TOPF and FSIQ, accounting for slightly more variance.
Overall, the TOPF accurately predicted IQ categorisation for only 52-53% of the sample; being most accurate for participants in the average range with regression to the mean being evident regardless of whether the discontinue rule was used or not.
In reflecting upon this, in light of the very low levels of variance explained in IQ by the TOPF compared to that in other countries, it could be hypothesized that this is due to differences in the New Zealand lexicon as well as to differences in the underlying relationship between reading ability and overall intelligence; with New Zealanders IQ scores perhaps being more reflecting of performance based abilities.
2002), and indeed education was significantly correlated to all WAIS and TOPF scores in the sample, which is also consistent with prior research (Barona et al.
The findings suggest that the TOPF is not a useful tool for neuropsychologists when estimating premorbid abilities of Maori clients.