The authors studied sensitivity to semantic priming, as distinct from semantic judgment, in poor readers. Association strength (high vs. low semantic association) was manipulated factorially with semantic association type (categoric vs. thematic association). Participants were 11-year-old poor readers (n = 15) who were matched with a group of chronological-age controls (n = 13), and also matched with a group of reading-age controls (n = 15). Three priming conditions were used: related, unrelated, and neutral prime. Neutral primes consisted of a row of hash marks. Related primes elicited shorter decision latencies than did unrelated primes. Neutral primes elicited the slowest responses in all groups. Poor readers showed an additional delay in the neutral prime condition. No effects of association type (categorical vs. thematic) or association strength (high vs. low) were found, nor were any relationship with reading ability found. The delayed performance of the poor readers on neutral primes is explained in terms of orthographic processing and dependency on grapheme phoneme relationships. The findings are discussed with reference to F. R. Vellutino, D. M. Scanlon, and D. Spearing's (1995) work on semantic processing and reading ability.

The MoCA-D distinguishes between healthy elderly, MCI patients and dementia patients. However, in this study, insufficient sensitivity and poor specificity were found. For the present, applying a broader and flexible screening procedure in order to detect MCI seems a more useful method than the interpretation of one test result in particular.