The authors examined patterns of facilitation under forward-masked priming conditions across 3 list contexts (Experiments 1-3) that varied with respect to properties of filler trials-(a) mixed (morphological, orthographic, semantic), (b) identity, and (c) semantic-but held the relatedness proportion constant (75%). Facilitation for targets that were related morphologically to their prime occurred regardless of filler context, but facilitation for semantically related pairs occurred only in the context of identity and semantic fillers. Facilitation was absent for orthographically similar prime-target pairs in all 3 filler contexts when matching numbers of orthographically similar wordword and word-nonword prime-target pairs rendered orthographic similarity uninformative with respect to lexicality of the target. Enhanced semantic and morphological facilitation in the context of identity and semantic relative to mixed fillers support a semantically attuned, as contrasted with a purely form-based, account of early morphological processing.
Keywordsforward-masked primes; semantic priming; morphological priming; prime validity; prime recruitment When primes are forward masked and appear for durations on the order of 50 ms or less, readers generally are unaware of their presentation. Nonetheless, various dimensions of similarity between forward-masked primes and their targets differentially influence this early phase of target recognition. Typically, it is difficult to observe semantic (e.g., craft-ART) facilitation when primes are forward masked and prime durations are as short as 50 ms in the lexical decision task (Forster, Mohan, & Hector, 2003;Rastle, Davis, Marslen-Wilson, & Tyler, 2000), although some have obtained it under exceptional conditions (see Perea & Gotor, 1997). Morphological (e.g., artist-ART) facilitation, however, is robust and easy to detect (Forster & Azuma, 2000;Forster, Davis, Schoknecht, & Carter, 1987;Grainger, Colé, & Segui, 1991;Pastizzo & Feldman, 2002;Rastle et al., 2000). Effects when orthographically similar primes are forward masked (e.g., artery-ART) are inconsistent. Some have observed nonsignificant orthographic inhibition (Janack, Pastizzo, & Feldman, 2004;Pastizzo & Feldman, 2002;Pollatsek, Perea, & Binder, 1999;Sears, Hino, & Lupker, 1995), whereas others have observed facilitation (Carreiras, Perea, & Grainger, 1997;Forster & Shen, 1996;Forster & Taft, 1994
NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author Manuscript effects seem to depend on lexicality of the prime (Siakaluk, Sears, & Lupker, 2002), relative prime-target length (De Moor & Brysbaert, 2000), relative prime-target frequency (Segui & Grainger, 1990), and properties of the target's orthographic neighborhood, including number of neighbors or density (Carreiras et al., 1997;Forster et al., 1987), number of higher frequency neighbors (Perea & Lupker, 2003), and number of shared neighbors between prime and target (Davis & Lupker, 2006).One interpretation of the failure to detect semantic facilitatio...