This work presents the results of a masked lexical decision experiment in which we explore the morphological parsing of Spanish suffixed or pseudosuffixed words through the suffix priming effect. Priming the bases or pseudobases with their suffixed or pseudosuffixed forms is the standard process in experiments aimed at understanding the processes underlying morphological parsing in visual word recognition with masked priming lexical decision (e.g., darkness-DARK; corner-CORN). We, however, compare the effect of suffix priming on the lexical decision of suffixed (ero-JORNALERO) and pseudosuffixed words (ero-CORDERO), as well as the effect of orthographic priming on nonsuffixed words (eba-PRUEBA). The results show that in the case of suffixed and pseudosuffixed words, related primes (ero-JORNALERO; ero-CORDERO) significantly accelerated response latencies in comparison to unrelated primes (ista-JORNALERO; ura-CORDERO), while for simple words there was no facilitation from the orthographically related prime in comparison to the unrelated prime (eba-PRUEBA; afo-PRUEBA). These results are consistent with the so-called morpho-orthographic segmentation process in the course of visual word recognition, which might also be independent of orthographic and purely semantic factors. Our results also support the view that morphological parsing takes place regardless of whether a stem is present in a word. These results complement findings from studies dealing with CORNER- and BROTHEL-like stimuli.

Several databases of written language exist in Spanish that manage important information on the lexical and sublexical characteristics of words. However, there is no database with information on the productivity and frequency of use of derivational suffixes: sublexical units with an essential role in the formation of orthographic representations and lexical access. This work examines these two measures, known as type and token frequencies, for a series of 50 derivational suffixes and their corresponding orthographic endings. Derivational suffixes are differentiated from orthographic endings by eliminating pseudoaffixed words from the list of orthographic endings (cerveza [beer] is a simple word despite its ending in -eza). We provide separate data for child and adult populations, using two databases commonly accessed by psycholinguists conducting research in Spanish. We describe the filtering process used to obtain descriptive data that will provide information for future research on token and type frequencies of morphemes. This database is an important development for researchers focusing on the role of morphology in lexical acquisition and access.

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Semantic transparency has been extensively analyzed in research on visual word recognition. Under the masked priming paradigm, it has consistently been shown that opaque and transparent words are facilitated relative to form-related controls, but differences in priming between one condition and another have not been conclusively proven. Hence, research has been unable to theoretically elucidate the possible value of semantic transparency in the processing of derived words. This study describes two lexical decision experiments in Spanish. Experiment 1 revealed differences between the transparent and orthographic conditions, with no differences between the other conditions in the analyses of the error rates. In the second experiment, the participants visited the laboratory on two occasions, separated by a week. The task was administered twice, with participants responding to one of the experimental lists on each day. The results of this second experiment revealed significant differences in the size of the priming effect of the opaque and transparent conditions compared to the form-related condition, but without differences between these two effects. We discuss these findings from the perspective of current models of visual lexical processing.

The role of morphemes in lexical recognition has been extensively explored in recent years, although the evidence from older adults is extremely scarce. In this study, we carry out a lexical decision task to assess the interference generated by morphological composition of pseudo-words (i.e., the longer and more error prone decisions on pseudo-words made up of morphemes in comparison to pseudo-words without morphological appearance) in a group of young and older adults (mean = 74 years). The results show the expected effect on both response latencies and error rates for both groups. The effect of imageability is also significant. The specific results for the older adults show an interaction between the morphological effect and cognitive reserve: older adults with higher levels of cognitive reserve are more sensitive to morphological interference than older adults with lower cognitive reserve. The overall results are interpreted based on current models of morphological processing and aging.