Abstracts 2005 - The Psychonomic Society

Abstracts 2005 - The Psychonomic Society Abstracts 2005 - The Psychonomic Society

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Posters 4086–4092 Saturday Noon Washington University (sponsored by Jay Pratt)—Intraindividual variability refers to changes within an individual and is reflected in the spread of performance around an individual’s mean. The aim of this study was threefold: (1) to determine whether intraindividual variability increases with age; (2) to determine the pervasiveness of obtained age-related increases in intraindividual variability; and (3) to determine whether intraindividual variability is related to quality of performance. To address these aims, we compared the coefficient of variability of younger and older adults on three tasks that varied demands on task difficulty and executive control. In accord with previous studies, older adults demonstrated larger degrees of intraindividual variability than did younger adults. Surprisingly, group differences were exacerbated in easy task conditions and were attenuated in difficult task conditions. Our findings suggest that older adults are more susceptible to lapses of attention when task demands are minimal. These results are interpreted in terms of age-related change in attentional control. (4086) Switch Costs in Humans Persist Even After Extensive Training. GIJSBERT STOET & LAWRENCE H. SNYDER, Washington University—Switch costs are a reduction in response speed and accuracy observed when humans switch between tasks. Theories of executive control suggest that switch costs reflect difficulty in managing stimulus– response associations. Furthermore, it is assumed that automated tasks require less control and should, therefore, be less prone to difficulties in executive control. We tested the hypothesis that extensive training would eliminate switch costs. Indeed, switch costs are commonly observed in humans, but not in extensively trained animals (Stoet & Snyder, Neuropsychologia, Vol. 41, 2003). Three human subjects were trained for ~26,000 trials on different days (n = 20–47 days). Response speed and accuracy decreased with training, but switch costs were never eliminated. We conclude that the improved performance suggests a trend toward the automatization of S–R associations, whereas the persistence of switch costs indicates a continued involvement of executive control in scheduling tasks. (4087) Separating Cue Encoding From Task Performance in Task Switching. CATHERINE M. ARRINGTON, GORDON D. LOGAN, & DARRYL W. SCHNEIDER, Vanderbilt University—Previously, we argued that switch costs in explicit task-cuing procedures reflect cue-encoding benefits. We explored this account in a series of experiments in which subjects responded separately to the cues and targets in a four-cue/ two-task paradigm. Cue responses involving simple vocalization of the cue resulted in patterns in the target RT data similar to that seen when no cue response is made, which can be accounted for with a compound retrieval cue strategy. When the cue response required recoding the verbal cue to a manual response or a different vocal response, the pattern of data changed such that cue RTs showed costs for cue alternations and target RTs showed costs for task alternations. This pattern of data can be accounted for by a model in which the cue response becomes a mediator that is used in combination with the target to retrieve the response from memory. (4088) Active Preparation in Task Switching: Differential Effects of Switch- To and Switch-Away Cues. FRINI KARAYANIDIS, REBECCA A. HANNAN, PATRICIA T. MICHIE, & ANNA DAVIES, University of Newcastle—Preparation for an impending switch in task set was manipulated using two types of switch cues: switch away from the previous task set or switch to a different task set. Participants (N = 24) switched randomly between letter, digit, and color task sets defined for the same stimulus set. RT switch cost (switch repeat) was larger for switch-away than for switch-to trials. Increasing cue–stimulus interval (CSI: 200 vs. 1,000 msec) facilitated switch-to trials only. At long CSI, event-related potential (ERP) waveforms showed a large, broad differential positivity peaking within the CSI for switch-to, relative to repeat, trials. Switch-away ERP waveforms showed two positiv- 118 ities, relative to repeat trials: one peaking within the CSI and another, smaller positivity that occurred after stimulus onset. Stimulus-locked ERP waveforms showed a differential switch-related negativity for both switch types. Results demonstrate dissociable effects of switching to an upcoming task set and switching away from the previously active task set, supporting multiple component models of task set reconfiguration. (4089) Is Task Set Switching Accomplished Through Task Set Inhibition? DAVID KUHNS & MEI-CHING LIEN, Oregon State University, & ERIC RUTHRUFF, University of New Mexico—Task switching can be accomplished by activating the new task, inhibiting the old task, or both. To look for direct evidence of an inhibitory component, we utilized a variant of a paradigm developed by Hübner, Dreisbach, Haider, and Kluwe (2003). Participants switched between three tasks in a predictable, repeating sequence (e.g., digit, letter, and symbol). Adjacent to the target was an irrelevant flanker stimulus belonging to another task—either the more recently performed task or the less recently performed task. If task set inhibition occurs but decays over time, flankers associated with the more recent task should have the smallest effect. But if there is no task inhibition, just task activation, flankers associated with the more recent task should have the largest effect. We found the latter result in several cases, calling into question whether irrelevant tasks were successfully inhibited. (4090) Switch Cost Asymmetry Without Switching. RICHARD L. BRYCK & ULRICH MAYR, University of Oregon (sponsored by Ulrich Mayr)— The “switch-cost asymmetry” effect (switching takes longer into dominant than into nondominant tasks) has been explained as activation pattern carryover across switch transitions (e.g., Gilbert & Shallice, 2002). We show that asymmetric costs can also be obtained in the absence of a task switch. In an AAAABBBB alternate-runs task-switching design, the first and second trial pairs within each same-task run were separated by either short or long intertrial intervals (ITIs), whereas within-pair trials where always short. Across two experiments, task selection costs, defined as Trial 1 versus Trial 2 within a pair, showed typical asymmetric costs after task changes for both ITIs, but also following task repetitions for the long ITI. Asymmetric costs without switching cannot result from carryover of activation patterns but are consistent with a long-term memory view of task selection (e.g., Mayr & Kliegl, 2000). (4091) Task Switching and Task Interruptions: Two Sides of the Same Coin? EDITA POLJAC, GERARD P. VAN GALEN, & HAROLD BEKKERING, Radboud University Nijmegen (sponsored by Gezinus Wolters)— Recently, task-switching paradigms became a tool for exploring cognitive control processes. Two series of behavioral studies with a multipletrial paradigm investigated the relationship between task-switching and task-restarting performance. Response times and error rates were measured for switching and nonswitching conditions in a color and shape matching task. The first study showed that both explicitly (by visual cues) and implicitly (by temporal separations of task elements) induced task interruptions produced restart costs. Furthermore, the restart costs were present only if, besides restart, switching also was required in the same paradigm, implying a similar nature of the two transition types. The second study illustrated that the cost of task interruption and task switching profited in a similar way from beforehand preparation. Altogether, our data suggest common preparatory mechanisms behind task switching and task interruption. Moreover, the data imply that cognitive control processes are involved in both transition types. • LANGUAGE PRODUCTION • (4092) Asymmetrical Language-Switching Costs: Is This Really Evidence for Language Suppression? MATTHEW S. FINKBEINER & ALFON-

Saturday Noon Posters 4093–4099 SO CARAMAZZA, Harvard University—The asymmetrical languageswitching cost (Meuter & Allport, 1999) is often cited as a signature effect of language suppression and has provided the bulk of empirical support for the language suppression hypothesis (Green, 1998). In this study, we found that unbalanced bilinguals exhibited an asymmetrical language-switching cost in a digit-naming task, but not when switching from digit naming to picture naming in the same experiment. Participants named pictures (in their L1) equally quickly regardless of whether the previous digit-naming trial had been named in L1 or L2. This was true even when the pictures and the digits elicited the same verbal responses (Experiment 2). We suggest that this finding constitutes a serious challenge to the language suppression hypothesis. In contrast to the suppression hypothesis, we suggest that bilingual lexical selection may proceed on the basis of differential activation. (4093) Word Spelling Performance Is Impaired by the Presentation of Errors During Feedback Intervention. EVE GRIVOT & ARNAUD REY, LEAD-CNRS, Université de Bourgogne, Dijon, SÉBASTIEN PACTON, Université René Descartes, Paris, & PIERRE PERRUCHET, LEAD- CNRS, Université de Bourgogne, Dijon—Several studies have shown that paying attention to misspellings has a negative impact on spelling performance (e.g., Brown, 1988). This observation suggests that when a teacher provides feedback after a spelling test, exposition to errors should be avoided. This hypothesis was tested in an experiment in which adult participants had to learn the spelling of 16 pseudowords. After a familiarization phase with all the pseudowords, participants performed two spelling tests successively. Between the two tests, one group did not receive any feedback on its spelling performance at Test 1. A second group received feedback and was exposed to its own errors. A third group received feedback but did not see its errors again. As was predicted, the results showed that performance at Test 2 was weaker for the second group. It therefore clearly indicates that exposing participants to their own errors during feedback intervention has a negative impact on spelling performance. (4094) Semantic Decomposability and the Acoustic Correlates of Idiom Production. DEBRA TITONE & SHARI BAUM, McGill University— Many studies have examined idiom comprehension; however, far fewer studies have examined spoken idiom production. In the present study, “verb the noun” idioms (e.g., chew the fat) were selected that varied in semantic decomposability of the verb and noun but were controlled in terms of familiarity and predictability of the idiom-final word. These idioms were embedded in idiomatic and literal contexts and were presented to 10 speakers in a manner that highlighted their interpretive contrast. Participants read the context sentence silently and then produced the idiomatic or literal target sentence for recording on digital media and, later, acoustic analysis. For all idioms, nouns were produced with longer durations in idiomatic, relative to literal, contexts. For idioms where noun decomposability was high, verbs were produced with shorter durations in idiomatic, relative to literal, contexts. These results suggest that speakers prosodically mark figurative productions of idiomatic expressions as a function of their semantic decomposability. (4095) Recency of Production Influences Semantic Substitutions in Blocked- Cyclic Naming. ESTHER Y. LEE, Moss Rehabilitation Research Institute, TATIANA T. SCHNUR, Moss Rehabilitation Research Institute & University of Pennsylvania, & MYRNA F. SCHWARTZ, Moss Rehabilitation Research Institute—When repeatedly naming sets of pictures from the same semantic category, aphasic speakers often produce substitutions from the set of pictures presented. These substitution errors could be due to random selection from the set or could depend on the recency of each name’s production (i.e., number of intervening trials, or “lag”). To assess whether recency played a role, we analyzed sub- 119 stitutions produced when aphasic participants named 12 sets of six related pictures in four-cycle blocks. To estimate the chance of producing substitutions by random selection, we shuffled target–response pairs within blocks, preserving each block’s cyclic structure. For both observed and random distributions, we calculated substitution frequency and the probability of a match for a given substitution, at each of the first six lags. After accounting for chance, both measures were found to change over lags. In accord with the competitor priming account, substitutions are dependent on the recency of previous production. (4096) Conditional Picture Naming: When It Costs and When It Doesn’t. CLAUDIO MULATTI, University of Trento, FRANCESCA PERES- SOTTI, University of Padua, & REMO JOB, University of Trento— Job and Tenconi (2002) proposed that to categorize-then-name pictures (conditional naming) does not take longer than just naming them (free naming), because the semantic information required for picture naming includes all the information required by categorization. An alternative explanation would be that the absence of cost in conditional naming, as compared with free naming, is due to the slow rate of activation of picture name representations, which allows other tasks, such as semantic categorization, to be covertly carried out. Empirical evidence disentangling the two explanations is provided. (4097) No Morphological Encoding in Chinese Word Production: Further Evidence. JENN-YEU CHEN, National Cheng Kung University, & GUAN-HUNG LIU & TRAIN-MIN CHEN, National Chung Cheng University—Employing the implicit priming paradigm, we had shown previously that word production in Chinese does not involve morphological encoding (Chen & Chen, in press). We sought further evidence from three experiments, employing the same paradigm. In Experiment 1, the disyllabic target words shared the initial characters or did not. The preparation effect was similar whether the shared characters corresponded to different morphemes or to the same morpheme. In Experiment 2, the disyllabic target words were monomorphemic or bimorphemic. They shared the initial syllables or did not. In the bimorphemic condition, the shared syllables were of the same character and of the same morpheme. The preparation effects were similar in the two conditions. In Experiment 3, associative word naming was contrasted with direct word naming. The preparation effect did not differ between the two versions of the implicit priming task. The results strengthened our previous conclusion. (4098) Errors in Deep Dyslexia Are Correlated With Words’ Production Complexity. ARPITA BOSE, ANNETTE COLANGELO, & LORI BUCHANAN, University of Windsor, & GUY VAN ORDEN, Arizona State University—Deep dyslexia is characterized by marked production of semantic errors and nonword reading difficulty. Various explanations have been proposed, particularly pertaining to the semantic and/or phonological systems. However, these explanations did not consider whether the output production difficulty of words could impact word reading. We tested for an effect of output production difficulty in a post hoc analysis of the reading errors of a deep dyslexic subject. Phonetic complexity of words estimated output production difficulty, and as words increased in phonetic complexity, so too did the likelihood of reading errors. In addition, the positive association of phonetic complexity with reading errors is modulated by semantic blocking. That is, the association was most pronounced when words were presented in blocks of semantically related words, as opposed to randomized lists. The findings will be discussed in the context of word production models including both lexical and production processes. (4099) Speech Errors: You Don’t Learn From Your Mistakes, You Simply Learn Your Mistakes. KARIN R. HUMPHREYS & HEATHER MEN- ZIES, McMaster University—Every act of speaking is also an act of

Saturday Noon Posters 4093–4099<br />

SO CARAMAZZA, Harvard University—<strong>The</strong> asymmetrical languageswitching<br />

cost (Meuter & Allport, 1999) is often cited as a signature<br />

effect of language suppression and has provided the bulk of empirical<br />

support for the language suppression hypothesis (Green, 1998). In<br />

this study, we found that unbalanced bilinguals exhibited an asymmetrical<br />

language-switching cost in a digit-naming task, but not when<br />

switching from digit naming to picture naming in the same experiment.<br />

Participants named pictures (in their L1) equally quickly regardless<br />

of whether the previous digit-naming trial had been named<br />

in L1 or L2. This was true even when the pictures and the digits<br />

elicited the same verbal responses (Experiment 2). We suggest that<br />

this finding constitutes a serious challenge to the language suppression<br />

hypothesis. In contrast to the suppression hypothesis, we suggest<br />

that bilingual lexical selection may proceed on the basis of differential<br />

activation.<br />

(4093)<br />

Word Spelling Performance Is Impaired by the Presentation of Errors<br />

During Feedback Intervention. EVE GRIVOT & ARNAUD REY,<br />

LEAD-CNRS, Université de Bourgogne, Dijon, SÉBASTIEN PACTON,<br />

Université René Descartes, Paris, & PIERRE PERRUCHET, LEAD-<br />

CNRS, Université de Bourgogne, Dijon—Several studies have shown<br />

that paying attention to misspellings has a negative impact on spelling<br />

performance (e.g., Brown, 1988). This observation suggests that<br />

when a teacher provides feedback after a spelling test, exposition to<br />

errors should be avoided. This hypothesis was tested in an experiment<br />

in which adult participants had to learn the spelling of 16 pseudowords.<br />

After a familiarization phase with all the pseudowords, participants<br />

performed two spelling tests successively. Between the two<br />

tests, one group did not receive any feedback on its spelling performance<br />

at Test 1. A second group received feedback and was exposed<br />

to its own errors. A third group received feedback but did not see its<br />

errors again. As was predicted, the results showed that performance<br />

at Test 2 was weaker for the second group. It therefore clearly indicates<br />

that exposing participants to their own errors during feedback<br />

intervention has a negative impact on spelling performance.<br />

(4094)<br />

Semantic Decomposability and the Acoustic Correlates of Idiom<br />

Production. DEBRA TITONE & SHARI BAUM, McGill University—<br />

Many studies have examined idiom comprehension; however, far fewer<br />

studies have examined spoken idiom production. In the present study,<br />

“verb the noun” idioms (e.g., chew the fat) were selected that varied in<br />

semantic decomposability of the verb and noun but were controlled<br />

in terms of familiarity and predictability of the idiom-final word.<br />

<strong>The</strong>se idioms were embedded in idiomatic and literal contexts and<br />

were presented to 10 speakers in a manner that highlighted their interpretive<br />

contrast. Participants read the context sentence silently and<br />

then produced the idiomatic or literal target sentence for recording on<br />

digital media and, later, acoustic analysis. For all idioms, nouns were<br />

produced with longer durations in idiomatic, relative to literal, contexts.<br />

For idioms where noun decomposability was high, verbs were<br />

produced with shorter durations in idiomatic, relative to literal, contexts.<br />

<strong>The</strong>se results suggest that speakers prosodically mark figurative<br />

productions of idiomatic expressions as a function of their semantic<br />

decomposability.<br />

(4095)<br />

Recency of Production Influences Semantic Substitutions in Blocked-<br />

Cyclic Naming. ESTHER Y. LEE, Moss Rehabilitation Research Institute,<br />

TATIANA T. SCHNUR, Moss Rehabilitation Research Institute &<br />

University of Pennsylvania, & MYRNA F. SCHWARTZ, Moss Rehabilitation<br />

Research Institute—When repeatedly naming sets of pictures<br />

from the same semantic category, aphasic speakers often produce substitutions<br />

from the set of pictures presented. <strong>The</strong>se substitution errors<br />

could be due to random selection from the set or could depend on the<br />

recency of each name’s production (i.e., number of intervening trials,<br />

or “lag”). To assess whether recency played a role, we analyzed sub-<br />

119<br />

stitutions produced when aphasic participants named 12 sets of six related<br />

pictures in four-cycle blocks. To estimate the chance of producing<br />

substitutions by random selection, we shuffled target–response pairs<br />

within blocks, preserving each block’s cyclic structure. For both observed<br />

and random distributions, we calculated substitution frequency<br />

and the probability of a match for a given substitution, at each of the<br />

first six lags. After accounting for chance, both measures were found<br />

to change over lags. In accord with the competitor priming account,<br />

substitutions are dependent on the recency of previous production.<br />

(4096)<br />

Conditional Picture Naming: When It Costs and When It Doesn’t.<br />

CLAUDIO MULATTI, University of Trento, FRANCESCA PERES-<br />

SOTTI, University of Padua, & REMO JOB, University of Trento—<br />

Job and Tenconi (2002) proposed that to categorize-then-name pictures<br />

(conditional naming) does not take longer than just naming them<br />

(free naming), because the semantic information required for picture<br />

naming includes all the information required by categorization. An alternative<br />

explanation would be that the absence of cost in conditional<br />

naming, as compared with free naming, is due to the slow rate of activation<br />

of picture name representations, which allows other tasks,<br />

such as semantic categorization, to be covertly carried out. Empirical<br />

evidence disentangling the two explanations is provided.<br />

(4097)<br />

No Morphological Encoding in Chinese Word Production: Further<br />

Evidence. JENN-YEU CHEN, National Cheng Kung University, &<br />

GUAN-HUNG LIU & TRAIN-MIN CHEN, National Chung Cheng<br />

University—Employing the implicit priming paradigm, we had shown<br />

previously that word production in Chinese does not involve morphological<br />

encoding (Chen & Chen, in press). We sought further evidence<br />

from three experiments, employing the same paradigm. In Experiment<br />

1, the disyllabic target words shared the initial characters or<br />

did not. <strong>The</strong> preparation effect was similar whether the shared characters<br />

corresponded to different morphemes or to the same morpheme.<br />

In Experiment 2, the disyllabic target words were monomorphemic<br />

or bimorphemic. <strong>The</strong>y shared the initial syllables or did not.<br />

In the bimorphemic condition, the shared syllables were of the same<br />

character and of the same morpheme. <strong>The</strong> preparation effects were<br />

similar in the two conditions. In Experiment 3, associative word naming<br />

was contrasted with direct word naming. <strong>The</strong> preparation effect<br />

did not differ between the two versions of the implicit priming task.<br />

<strong>The</strong> results strengthened our previous conclusion.<br />

(4098)<br />

Errors in Deep Dyslexia Are Correlated With Words’ Production<br />

Complexity. ARPITA BOSE, ANNETTE COLANGELO, & LORI<br />

BUCHANAN, University of Windsor, & GUY VAN ORDEN, Arizona<br />

State University—Deep dyslexia is characterized by marked production<br />

of semantic errors and nonword reading difficulty. Various explanations<br />

have been proposed, particularly pertaining to the semantic<br />

and/or phonological systems. However, these explanations did not consider<br />

whether the output production difficulty of words could impact<br />

word reading. We tested for an effect of output production difficulty<br />

in a post hoc analysis of the reading errors of a deep dyslexic subject.<br />

Phonetic complexity of words estimated output production difficulty,<br />

and as words increased in phonetic complexity, so too did the likelihood<br />

of reading errors. In addition, the positive association of phonetic<br />

complexity with reading errors is modulated by semantic blocking.<br />

That is, the association was most pronounced when words were presented<br />

in blocks of semantically related words, as opposed to randomized<br />

lists. <strong>The</strong> findings will be discussed in the context of word production<br />

models including both lexical and production processes.<br />

(4099)<br />

Speech Errors: You Don’t Learn From Your Mistakes, You Simply<br />

Learn Your Mistakes. KARIN R. HUMPHREYS & HEATHER MEN-<br />

ZIES, McMaster University—Every act of speaking is also an act of

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