Semantic, phonological, and mediated priming in reading and lexical decisions.

Four experiments were conducted to investigate whether semantic activation of a concept spreads to phonologically and graphemically related concepts. In lexical decision or self-paced reading tasks, subjects responded to pairs of words that were semantically related (e.g., light–lamp), that rhymed (e.g., lamp–lamp), or that combined both of these relations through a mediating word (e.g., light–lamp). In one version of each task, test lists contained word–word pairs (e.g., light–lamp) as well as nonword–word (e.g., pown–table) and word–nonword pairs (e.g., month–poad); in another version, test lists contained only word–word pairs. The lexical decision and self-paced reading tasks were facilitated by semantic and rhyming relations regardless of the presence or absence of nonwords on the test lists. The effect of the mediated relation, however, depended on the presence of nonwords among the stimuli. When only words were included, there was no effect of the mediated relation, but when nonwords were included, lexical decision and self-paced reading responses were inhibited by the mediated relation. These inhibitory effects are attributed to processes occurring after lexical access, and the relative advantages of the self-paced reading task are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparing retrieval dynamics in recognition memory and lexical decision.

The response-signal method was used to study memory retrieval in the lexical-decision (LD) and recognition-memory (RM) tasks. In Experiment 1 subjects studied mixed lists of words and nonwords and then were tested on old and new words and nonwords, under either RM or LD instructions. The earliest above-chance performance (the intercept) was shorter for LD than for RM. Repetition priming in LD appeared primarily in bias, and the only reliable RM difference between words and nonwords was a bias to respond 'old' more often to nonwords. In Experiment 2, subjects made lexical decisions to high frequency (HF) and low frequency (LF) words. LF words had a later intercept than HF words, but repetition priming largely eliminated this difference. As in Experiment 1, priming also affected LD bias. The findings have implications for several issues concerning lexical and episodic retrieval and for the ways in which the LD and RM tasks are related. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An Observation on the Role of Context Variability in Free Recall.

The authors conducted 3 experiments investigating the effect of context variability and word frequency on free recall. Context variability refers to the number of preexperimental contexts in which a given word is experienced. Both between-subjects and within-subjects manipulations of context variability demonstrated a distinct advantage for low context variability words. Standard word frequency effects were obtained in 2 of the 3 experiments, but the common finding of no word frequency differences in mixed lists of high and low word frequency may depend on the level (low vs. high) of context variability. The authors speculate that the advantage for low context variability items may accrue from better item-to-list context associations or better storage of contextual information as a consequence of the smaller preexperimental contextual fan that these items possess. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Rate of forgetting in amnesia: II. Recall and recognition of word lists at different levels of organization.

Amnesic rate of decline of free recall, cued recall, and recognition of word lists with different levels of organization was investigated in 2 experiments. In Experiment 1, it was found that amnesic free recall of semantically related word lists declined at an accelerated rate, whereas free recall of lists of unrelated words declined at a normal rate. Cued recall and recognition performance of both kinds of word lists appeared to decline at a normal rate. In Experiment 2, the results of the free-recall and recognition conditions were replicated using an improved experimental design. The observed amnesic forgetting pattern is interpreted as arising from an impairment in consolidation of long-term memory for complex associations between 2 or more items and their study context that is caused by extended hippocampal system lesions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Rule and analogy mechanisms in reading nonwords: Hough dou peapel rede gnew wirds?

In Experiment 1, participants read a long list of nonwords and made ratings of pronunciation variability. Experiment 2 compared speeded naming of nonwords presented alone or mixed with words. In both experiments, at least 85% of nonwords based on inconsistent word bodies were pronounced according to spelling–sound rules, but regular pronunciations were assigned to only 30–40% of nonwords with no regular word-body neighbors. Contradicting the prediction of parallel-distributed-processing models of nonword naming, the probability of an irregular pronunciation was a function of the proportion of irregular word neighbors, not the frequency of these neighbors. The dual-route cascade model overestimated the proportion of regular nonword pronunciations but successfully predicted the particular nonwords most likely to be pronounced irregularly. These results highlight the issues that must be addressed in future refinements of models of nonword naming. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Separating consciously controlled and automatic influences in memory for new associations.

The process dissociation paradigm was applied to investigate the contributions of automatic and consciously controlled processes to the repetition priming effect for new associations, under elaborative encoding (Experiments 1 and 2) and copy instructions (Experiment 3). Semantically unrelated context–target word pairs were presented during study, and context words and stems were presented during test. Target word stems were paired with the same context words as at study (intact), paired with different context words from study (recombined), or were the stems of unstudied words (control). Participants had to complete stems with the first word that came to mind (indirect), with studied words (inclusion), or with new, unstudied words (exclusion). Results indicated that consciously controlled processes mediated the associative repetition effect under elaborative encoding, whereas automatic processes were implicated under copy instructions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Previewing the neighborhood: The role of orthographic neighbors as parafoveal previews in reading.

In 2 experiments, a boundary technique was used with parafoveal previews that were identical to a target (e.g., sleet), a word orthographic neighbor (sweet), or an orthographically matched nonword (speet). In Experiment 1, low-frequency words in orthographic pairs were targets, and high-frequency words were previews. In Experiment 2, the roles were reversed. In Experiment 1, neighbor words provided as much preview benefit as identical words and greater benefit than nonwords, whereas in Experiment 2, neighbor words provided no greater preview benefit than nonwords. These results indicate that the frequency of a preview influences the extraction of letter information without setting up appreciable competition between previews and targets. This is consistent with a model of word recognition in which early stages largely depend on excitation of letter information, and competition between lexical candidates becomes important only in later stages. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Making things difficult in lexical decision: The impact of pseudohomophones and transposed-letter nonwords on frequency and semantic priming effects.

Performance in a lexical decision task is crucially dependent on the difficulty of the word–nonword discrimination. More wordlike nonwords cause not only a latency increase for words but also, as reported by Stone and Van Orden (1993), larger word frequency effects. Several current models of lexical decision making can explain these types of results in terms of a single mechanism, a mechanism driven by the nature of the interactions within the lexicon. In 2 experiments, we replicated Stone and Van Orden's increased frequency effect using both pseudohomophones (e.g., BEEST) and transposed-letter nonwords (e.g., JUGDE) as the more wordlike nonwords. In a 3rd experiment, we demonstrated that simply increasing word latencies without changing the difficulty of the word–nonword discrimination does not produce larger frequency effects. These results are reasonably consistent with many current models. In contrast, neither pseudohomophones nor transposed-letter nonwords altered the size of semantic priming effects across 4 additional experiments, posing a challenge to models that would attempt to explain both nonword difficulty effects and semantic priming effects in lexical decision tasks in terms of a single, lexically driven mechanism. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Search for a singular word or nonword.

Observers looked for an out-of-category item, either a singular word in a list of nonwords (i.e., random collections of letters) or a singular nonword in a list of words. When list items were presented simultaneously (Exp 1), words were detected faster than nonwords, but a singular word in a nonword list was missed more often than a singular nonword in a word list. These results are consistent with the internal-noise principle (INP). According to the INP, legal letter sequences are more likely to be misperceived as illegal than are illegal sequences as legal; thus, there was more rechecking of perceived nonwords than perceived words. With rapid serial visual presentation of list items (Exp 2), the effect of list type vanished. The missing-feature principle, which credits unresolved letters and features to legal letter sequences wherever possible, was as strong and evident as the INP during early processing. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Word frequency as a determinant of clustering when taxonomic frequency is held constant.

Performed 2 experiments with 100 undergraduates to investigate the effect of word frequency on the multitrial free recall of lists of categorized words. A higher incidence of category clustering was obtained with words of relatively low Thorndike-Lorge frequencies of use than with words of relatively high frequencies, when taxonomic frequency was held constant. Pre-presentation cuing with category labels did not reduce the negative effect of word frequency on clustering. These results support the inference that the more extensive interitem associations in lists of high frequency words interfere with the learning of a specified set of relations in multitrial free recall. (French summary) (39 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influence of case type, word frequency, and exposure duration on visual word recognition

The authors report 4 lexical decision experiments in which case type, word frequency, and exposure duration were varied. These data indicated that there is a larger mixed-case disadvantage for nonwords than for words for longer duration presentations of targets. However, when targets were presented for 100 ms (followed by a postdisplay pattern mask), a larger mixed-case disadvantage occurred for words than for nonwords. For word frequency, the data from Experiments 1, 2, and 3 revealed a slightly larger mixed- case disadvantage for higher frequency words than for lower frequency words. (There was additivity between word frequency and case type for experiment 4.) These results are consistent with a holistically biased, hybrid model of visual word recognition but inconsistent with analytically biased, hybrid models of word recognition, such as the process model (Besner & Johnston, 1989) and the interactive-activation model (McClelland & Rumelhart, 1981).     

The effect of divided attention on memory for items and their context.

Examined differences between item and context memory using divided attention at encoding and retrieval. Ss, in 3 experiments, were presented with word lists and were instructed to learn the items (i.e., words), the intrinsic context (i.e., the color of the cards on which each word was presented), and the extrinsic context (i.e., the temporal order of the words). In Exp 1 24 undergraduates (aged 20–32 yrs) participated in a digit-monitoring and memory tasks. In Exp 2 the authors examined the effect of divided attention at retrieval using 24 undergraduates (aged 18–29 yrs). In Exp 3 the authors examined memory performance when divided attention was employed at encoding on all lists, and attentional load was manipulated at retrieval using 24 undergraduates (aged 19–32 yrs). Among young adults, in comparison to conditions of full attention, divided attention applied at encoding only or retrieval only resulted in equally lower performance on all memory tasks; in contrast, divided attention applied at both encoding and retrieval resulted in lower performance only on memory for temporal order. The findings support the idea that memory for temporal order requires greater attentional resources and strategic processing than memory for items. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Factors affecting children's reading of rimes: Reading ability, word frequency, and rime-neighborhood size.

Beginning readers were studied in 2 experiments to examine the influence of reading ability, word frequency, and rime-neighborhood size (the number of single syllable words with the same rime) on word and nonword recognition. Forty 1st and 2nd graders read 53 words and 27 nonwords containing rimes from different-size neighborhoods. Children reading at or below a 2nd-grade level were less affected by rime-neighborhoods than children reading at or above a 3rd-grade level. Rimes from large neighborhoods were read correctly more often in lists and stories than rimes from moderate or small neighborhoods, particularly in low-frequency words. As children learn to read, they become increasingly sensitive to rime-neighborhood size. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Similarity neighborhoods of spoken two-syllable words: Retroactive effects on multiple activation.

Investigated the influence of individual syllables in 2-syllable words on the recognition of each other. Specifically, perceptual identification of 2-syllable words comprised of 2 monosyllabic words (spondees) was examined. Individual syllables in a spondee were characterized as either easy or hard, depending on the syllable's neighborhood characteristics; an easy syllable was a high-frequency word in a sparse neighborhood of low-frequency words, and a hard syllable was a low-frequency word in a high-density, high-frequency neighborhood. In Exp 1, stimuli were created by splicing together recordings of component syllables of the spondee, thus equating for syllable stress. Additional experiments tested the perceptual identification of naturally produced spondees, spliced nonwords, and monosyllables alone. Neighborhood structure strongly affected identification in all experiments. Identification performance for spondees with a hard–easy syllable pattern was higher than for spondees with an easy–hard syllable pattern, indicating a primarily retroactive pattern of influence in spoken word recognition. Results strongly suggest that word recognition involves multiple activation and delayed commitment, thus ensuring accurate and efficient recognition. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Role of study strategy in recall of mixed lists of common and rare words.

Experiment 1 confirmed previous findings that common words are more recallable than are rare words when the 2 kinds of words are presented in separate lists but not when they are presented in the same list. Experiment 2 showed much the same pattern when an orienting task was performed during word presentation. In Experiment 3 common words were found to be more recallable than rare words even for mixed lists when no warning was given of the memory test, although the effect was less pronounced than for pure lists. In Experiment 4 stronger measures were taken to preclude anticipation of the memory test, and the effect of word commonness was found to be just as pronounced with mixed lists as it was with pure lists. It was suggested that lists are studied in a way believed to optimize recall and that mixed lists foster a strategy of favoring the rare words. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neighborhood size effect in naming: Lexical activation or sublexical correspondences?

Naming latencies are generally shorter for letter strings that are orthographically similar to many words than for those that have few lexical neighbors. Two experiments were conducted to explore the locus of the neighborhood size effect in a naming task. Experiment 1 showed that the neighborhood size effect was restricted to low-frequency words and was of comparable magnitude for words and for pseudowords. Experiment 2 examined performance as a function of the composition of the experimental lists. Target words were mixed with word or pseudoword fillers. The neighborhood size effect decreased in the pseudoword context relative to the word context. The data are compatible with the notion that the neighborhood size effect follows from the activation of specific word knowledge during print-to-sound computation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Conformity in a generative linguistic task: The role of category and strategic nonword use.

Marsh, Ward, and Landau (1999) demonstrated that participants asked to create novel words use elements of sample nonwords they are given, even when instructed to avoid use of the examples. In four studies, we replicated the effect of conformity to sample nonwords and found the effect was not influenced by the semantic category of the words unless those words shared orthographic characteristics. We found that although we could increase conformity to examples when word exemplars were grouped by category, it was likely that much of this increase was strategically driven. We propose that the presence of the sample nonwords, presented in groups with the same word rules, created an orthographic category used by participants in the word creation task. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Basic decoding components in reading: Two dissociable feature extraction processes.

Two views of the feature-extraction process underlying visual word recognition are contrasted. One asserts that features that span individual letters (configurational features) are functional. The other asserts instead that preliminary letter identification alone subserves word recognition. Configurational feature theory predicts that since case alternation eliminates configurational features, words should be more disrupted than nonwords because words have more configurational features than nonwords. The alternative theory predicts that since only preliminary letter identification underlies both word and nonword recognition, any effect of case alternation should be at least as disruptive to nonwords as to words. Two experiments, with 66 undergraduates, varied the utility of configurational features by case alternation and demonstrated that lexical decision provides data consistent with configurational feature theory, but naming latency provides data consistent with preliminary letter identification. Additional findings suggest that configurational features subserve only a familiarity discrimination process that can be recruited for some tasks but is eschewed for others. Tasks that require that a word be uniquely specified rely on preliminary letter identification; case alternation effects in these latter tasks may reflect delays in the mapping of abstract information back on to the original sensory pattern (perceptual integration). (French abstract) (25 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The influence of selection for response on repetition priming of word identification.

Repetition priming of word identification was examined using study tasks that required participants either to search for targets appearing in rapid serial visual presentation of word lists or to read aloud a list of target words. Nontarget words embedded in search lists produced a small amount of repetition priming on a masked word identification test, independent of presentation duration in the search list (200–1,000 ms), but no priming when they appeared as targets in a second search task used at test. For both test tasks, words that were originally encoded in a read-aloud task or served as detected targets during a search task generated more priming than nontarget words from search lists. These results suggest that priming effects are strongest when study tasks require an item to be selected as the basis for an overt response, even though the information on which study and test responses are based may be different. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The role of spatial attention in visual word processing.

Ss made lexical decisions on a target letter string presented above or below fixation. In Exps 1 and 2, target location was cued 100 msec in advance of target onset. Responses were faster on validly than on invalidly cued trials. In Exp 3, the target was sometimes accompanied by irrelevant stimuli on the other side of fixation; in such cases, responses were slowed (a spatial filtering effect). Both cuing and filtering effects on response time were additive with effects of word frequency and lexical status (words vs nonwords). These findings are difficult to reconcile with claims that spatial attention is less involved in processing familiar words than in unfamiliar words and nonwords. The results can be reconciled with a late-selection locus of spatial attention only with difficulty but are easily explained by early selection models. (PsycINFO Database Record (c) 2010 APA, all rights reserved)