Arabic-speaking students learn to read a transparent maʃku:l script, which provides full vowel information using letters to represent long vowels and phonemic diacritics for short vowels. Gradually, they progress to an opaque ɣayr-maʃku:l script, without diacritics. In this script, internal short vowels can be retrieved using morphological information about word patterns. The current study compared the contribution of phonological information to that of morphological information in the reading acquisition process in Arabic. Four Arabic-speaking groups (2nd, 4th, 6th grades, and adults) read three lists of pseudowords aloud. Two lists included the same morphologically based pseudowords (MPW), one maʃku:l and the second ɣayr-maʃku:l. The third list comprised matched maʃku:l nonwords (NW) with no internal morphological structure. All groups read the ɣayr-maʃku:l MPW list faster than the two other maʃku:l lists, and maʃku:l NWs were read the slowest. There was an age by list type accuracy interaction: while ɣayr-maʃku:l MPWs were read more accurately with increasing age, there were no differences between the student groups with respect to either of the other two lists. However, maʃku:l MPWs were read more accurately than maʃku:l NWs. The findings suggest that from very early on, morphology exceeds phonology, playing a crucial role in supplementing missing vowel information.

The study explores the potential clinical value of reading fluency measures in complementing demographic variables as indices of current intellectual capacity. IQ estimates (based on the PPVT-R, WASI Vocabulary and Block Design subtests) were obtained from a representative, non-clinical sample of 386 Greek adults aged 48–87 years along with two measures of reading efficiency (one involving relatively high-frequency words—WRE—and the second comprised of phonotactically matched pseudowords—PsWRE). Both reading measures (number of items read correctly in 45 s) accounted for significant portions of variability in demographically adjusted verbal and performance IQ indices. Reading measures provided IQ estimates which were significantly closer to those predicted by demographic variables alone in up to 22% of individuals with fewer than 7 (across all ages) or 13 years of formal education (in the 70–87 year age range). PsWRE scores slightly outperformed WRE scores in predicting a person's estimated verbal or performance IQ. Results are discussed in the context of previous findings using reading accuracy measures for low-frequency words with exceptional spellings in less transparent orthographic systems such as English. (JINS, 2013, 19, 1–7)