Low-span Participants Research Articles

Acute alcohol intoxication and the cocktail party problem: do \u201cmocktails\u201d help or hinder?

RationaleTo test the notion that alcohol impairs auditory attentional control by reducing the listener’s cognitive capacity.ObjectivesWe examined the effect of alcohol consumption and working memory span on dichotic speech shadowing and the cocktail party effect—the ability to focus on one of many simultaneous speakers yet still detect mention of one’s name amidst the background speech. Alcohol was expected either to increase name detection, by weakening the inhibition of irrelevant speech, or reduce name detection, by restricting auditory attention on to the primary input channel. Low-span participants were expected to show larger drug impairments than high-span counterparts.MethodsOn completion of the working memory span task, participants (n = 81) were randomly assigned to an alcohol or placebo beverage treatment. After alcohol absorption, they shadowed speech presented to one ear while ignoring the synchronised speech of a different speaker presented to the other. Each participant’s first name was covertly embedded in to-be-ignored speech.ResultsThe “cocktail party effect” was not affected by alcohol or working memory span, though low-span participants made more shadowing errors and recalled fewer words from the primary channel than high-span counterparts. Bayes factors support a null effect of alcohol on the cocktail party phenomenon, on shadowing errors and on memory for either shadowed or ignored speech.ConclusionFindings suggest that an alcoholic beverage producing a moderate level of intoxication (M BAC ≈ 0.08%) neither enhances nor impairs the cocktail party effect.

A preregistered replication and extension of the cocktail party phenomenon: One's name captures attention, unexpected words do not.

In the cocktail party phenomenon, participants cannot attend to more than 1 stream of information, but sometimes detect their own name being presented in the irrelevant message during a selective listening task. Here we present a preregistered replication of the phenomenon, in which we also tested whether semantically unexpected words have a similar effect and whether individual differences in working memory capacity as measured by the operation and running-span tasks are related to the ability to detect one's own name or unexpected words in the irrelevant message. Twenty-nine percent of the participants reported noticing their own name, and those who did made more errors on relevant, to-be-shadowed words presented around the time of the name. Low-span participants were more likely than high-span participants to notice their names and to commit shadowing errors concurrently to the presentation of the name or shortly after. In contrast, semantically unexpected words were rarely detected, nor were they associated with shadowing errors in the relevant message. Our results demonstrate once again that highly relevant stimuli such as one's own name are capable of attracting and capturing attention for a short period of time. Our results also demonstrate that unexpected words within sentences do not belong to this category of stimuli. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

The role of working memory capacity in analytic and multiply-constrained problem-solving in demanding situations.

Working memory processes are important for analytic problem-solving; however, their role in multiply-constrained problem-solving is currently debated. This study explored individual differences in working memory and successful completion of analytic and multiply-constrained problem-solving by having participants solve algebra and compound remote associate (CRAT) problems of varying difficulty under low and high memory demand conditions. Working memory was predictive of both algebra and multiply-constrained problem-solving. Specifically, participants with high working memory solved more problems than those with low working. Memory load did not differentially affect performance for low and high working memory participants. However, for multiply-constrained problem-solving the effect of item difficulty was more detrimental for high-span participants than low-span participants. Together, these findings suggest that working memory processes are important for both types of problem-solving and that participants with low working memory capacity may need to offload internal memory demands onto the environment to efficiently solve problems.

Individual differences in visuospatial working memory: benefits from environmental support for rehearsal

ABSTRACTPrevious research has suggested that participants with low working memory spans are less likely than those with high spans to engage in rehearsal and other effective strategies during memory tasks. However, most of this research has been conducted in the verbal domain, and less is known about strategy differences in visuospatial working memory. Therefore, the present experiments investigated potential individual differences in the benefit participants receive from environmental support for visuospatial rehearsal. In Experiment 1, memory spans were significantly larger when support was present (i.e. when the array of possible locations remained on the screen) during long inter-item intervals, but importantly, the observed benefit was larger for high-span participants than low-span participants, suggesting that high spans were more likely to use support to facilitate their rehearsal. Other research has suggested that low spans may benefit more than high spans from rehearsal instructions, and so in Experiment 2, participants also were provided with such instructions. However, the rehearsal instructions did not improve memory spans significantly in either group, suggesting that low spans are not only naturally less strategic than high spans, but they may be less capable of taking advantage of effective rehearsal strategies, even when environmental support is present.

The role of working memory in inference generation during reading comprehension: Retention, (re)activation, or suppression of verbal information?

The present study explored the role of working memory (WM) in online activation of bridging and predictive inferences during reading comprehension. Using short narratives and a probe-naming procedure, five hypotheses were examined: Text retention, text reactivation, inference retention, inference activation, and text and inference suppression. In addition, three types of WM span tests—listening-, operation- and symmetry-span tests—were used to examine whether the role of WM in inference generation is domain-specific for discourse items, domain-specific for verbal items, or domain-general, respectively. Different patterns of results were observed for high- and low-span groups only when participants were divided based on the listening-span test. High-span participants generated predictive inferences faster than low-span participants, and then quickly inhibited them when they became less relevant in the following sentence. Moreover, high-span participants generated more bridging inferences than low-span participants, possibly due to enhanced retention and reactivation of inference-evoking textual information. These findings support the inference activation, inference inhibition, text retention, text reactivation, and discourse-domain-specific hypotheses of WM's role in inference generation. The unique contribution of this study to the field is discussed in relation to existing findings and theories of WM.

Working memory capacity and controlled serial memory search

The speed–accuracy trade-off (SAT) procedure was used to investigate the relationship between working memory capacity (WMC) and the dynamics of temporal order memory retrieval. High- and low-span participants (HSs, LSs) studied sequentially presented five-item lists, followed by two probes from the study list. Participants indicated the more recent probe. Overall, accuracy was higher for HSs compared to LSs. Crucially, in contrast to previous investigations that observed no impact of WMC on speed of access to item information in memory (e.g., Öztekin & McElree, 2010), recovery of temporal order memory was slower for LSs. While accessing an item’s representation in memory can be direct, recovery of relational information such as temporal order information requires a more controlled serial memory search. Collectively, these data indicate that WMC effects are particularly prominent during high demands of cognitive control, such as serial search operations necessary to access temporal order information from memory.

Individual differences in interrupted task performance: One size does not fit all

Two experiments used a spatial navigation task to study the relationship between individual differences in working memory capacity and interrupted task performance. The results of experiment one show that participants with low working memory capacity (WMC) are more susceptible to the negative effects of interruptions than participants with high WMC. The results of additional analyses indicate that both groups differ in their strategies used to memorize material from the primary task. A second experiment manipulated memory strategy use for high and low memory span participants and found that low span participants performed at the level of high spans when using a strategy that is more typically used by high span participants. However, this performance improvement did not show during interrupted tasks. Overall, these results suggest that individual memory capacity differences affect performance during interrupted tasks by determining selection of memory strategies and by limiting performance of participants.

Effets de l’âge et de la capacité de mémoire de travail sur l’exécution d’instructions de complexité variable chez des adultes jeunes et âgés

Technical devices are part of elderly people's daily life. Meanwhile, research has not yet systematically explored how old people understand procedural instructions accompanying these devices. Thus, the aim of this study was to investigate how age and memory span affect how people follow procedural instructions. To do so, the Reading Span Test of Daneman & Carpenter (1980) and an adaptation of the Kaplan & White's (1980) following directions game were administrated to young and older adults. The Reading Span Test was administrated in order to determine the participants’ memory span size. Then, participants had to follow procedural instructions with a growing complexity displayed on a computer screen. Results show that participants’ age and instructions complexity affect how the instructions are performed. Old adults encounter more difficulty performing the task than young adults. Furthermore, whatever the age, as the complexity of instructions increases, low-span participants have more difficulty performing instructions than high-span participants do.

Working memory modulates neural efficiency over motor components during a novel action planning task: An EEG study

Research shows neural efficiency of motor-related activity based on learning and expertise in a specific domain (e.g., guitar playing, sharp-shooting or a sport). However, it is unknown whether neural efficiency of motor-related activity, underlying action planning and maintenance, can be modulated by general cognitive ability alone. This study examined whether working memory span can influence motor-related neural activity during a novel motor task. Participants were divided into low- and high-span working memory groups based on their scores in an operation span task. Afterwards, participants learned different sequences of button responses corresponding to different abstract stimuli. The task required participants to briefly maintain an action plan in working memory to a stimulus that they would execute after responding to a subsequent stimulus. We used EEG to record changes in event related power in the mu- and beta-bands in left and right motor components during the interval where participants planned and maintained an action in working memory. Results showed decreases in mu- and beta-event related power for low-span participants and increases in mu- and beta-event related power for high-span participants over the left motor cluster while maintaining an action plan in working memory. Also, high-span participants were faster and more accurate in the task than low-span participants. This suggests that neural efficiency during a novel motor task can be influenced by working memory span, and that such differences are localized to the motor system.

Working Memory Capacity and Mental Rotation: Evidence for a Domain-General View

Despite the existence of numerous studies that examined the relationship between working memory capacity and performance in complex cognitive tasks, it remains unclear whether this capacity is domain specific or domain general. In addition, the available empirical evidence is somewhat contradictory. In this work we have studied the role of verbal working memory capacity in a non-verbal task--mental image rotation. If this capacity were domain specific it would be expected that high and low verbal span participants would obtain similar results in the mental rotation task. We have found that this is not the case as the high span participants performed better in terms of both speed and accuracy. Moreover, these differences depended on the processing component of the mental rotation task: the higher the processing requirements the higher the differences as a function of the working memory capacity. Therefore, the evidence presented here supports the domain general hypothesis.

The Influence of Working Memory Span on the Accentuation Effects in Discourse Comprehension

Working memory capacity is of central importance for many complex cognitive tasks such as language comprehension. Previous research has focused on how working memory capacity affects syntactic, semantic, and pragmatic processing. It is not clear whether working memory capacity also affects prosody. At the prosodic level, the correspondences between accentuation and information structure have been proven to exert an influence on discourse comprehension. This study explored the influence of working memory capacity on accentuation effects in discourse comprehension from an individual difference approach. High (n=27) and low (n=23) working memory span participants were selected by Reading Span Test from 106 college students. Sentence-by-Sentence Auditory Moving Window Paradigm was employed to measure the effects of accentuation on discourse comprehension, with 24 discourses (each containing 5 sentences) as materials. The on-line processing time of discourse comprehension, measured by difference time, was compared among 3 conditions: consistent accentuation condition, inconsistent accentuation condition and controlled condition. Low working memory span participants showed speeded on-ling processing in the consistent condition, and slowed processing in the inconsistent condition. High span participants, on the other hand, showed neither effect. High and low span participants did not differ significantly in either the consistent or neutral accentuation conditions. In the inconsistent accentuation condition, however, low span participants spent significantly more time on the on-line processing of spoken discourse than high span participants. These results suggest that: (1) Accentuation effects in discourse comprehension are influenced by working memory capacity, and the influence can be explained by the controlled attention view of working memory. (2) Practical implications of this study would be to call attention to the appropriate employment of prosody such as accentuation, especially during the verbal communication with people who have lower working memory capacity.

Relationship between measures of working memory capacity and the time course of short-term memory retrieval and interference resolution.

The response-signal speed-accuracy trade-off (SAT) procedure was used to investigate the relationship between measures of working memory capacity and the time course of short-term item recognition. High- and low-span participants studied sequentially presented 6-item lists, immediately followed by a recognition probe. Analyses of composite list and serial position SAT functions found no differences in retrieval speed between the 2 span groups. Overall accuracy was higher for high spans than low spans, with more pronounced differences for earlier serial positions. Analysis of false alarms to recent negatives (lures from the previous study list) revealed no differences in the timing or magnitude of early false alarms, thought to reflect familiarity-based judgments. However, analyses of false alarms later in retrieval indicated that recollective information accrues more slowly for low spans, which suggests that recollective information may also contribute less to judgments concerning studied items for low-span participants. These findings can provide an explanation for the greater susceptibility of low spans to interference.

Processing Italian Relative Clauses: Working Memory Span and Word Order Effects on RTs

ABSTRACT In this study, the authors aim to clarify whether the subject–object asymmetry in relative clause comprehension is due to the use of parsing strategies (Active Filler Theory) or to a greater memory load generated by object sentences. Two experiments investigate how individual differences in working memory span may influence the reading times of relative sentences in Italian, a language characterized by a flexible structure. The results of Experiment 1 indicate that object extraction is more complex than subject extraction when sentences have a canonical structure. Furthermore, low-span participants have particular difficulties with object relative sentence comprehension. The results of Experiment 2 show that subject-relative clauses with uncanonical structures are more complex to understand than object-relative clauses, and low-span participants have more difficulties than high-span participants in elaborating both subject and object relative clauses. These data seem to be coherent with the Active Filler Theory.

Individual Differences in Visuospatial Working Memory Capacity and Distractor Inhibition

Studies examining individual differences in working memory capacity (WMC) show differences between individuals with low-WMC and individuals with high-WMC. This extreme-group design was used to address relationships between individual differences in visuospatial WMC and distractor inhibition. We examined the patterns of errors made on two visuospatial working-memory span tasks (selective matrix task, visual matrix task). We recorded intrusion errors as indicators of inefficient inhibitory mechanisms, and spatial errors as indicators of degraded memory traces. Results indicate that on both tasks, low-span participants make more intrusion errors and spatial errors than high-span participants. Results are discussed in terms of the ability to inhibit distractors, to control the focus of attention, and to guide search from memory.

When the Creampuff Beat the Boxer: Working Memory, Cost, and Function in Reading Metaphoric Reference

Following Almor's (1999) cost-function analysis of referential processing, we hypothesized that reading times of metaphoric anaphors are affected by readers' working memory ability and reflect a balance between discourse function and processing cost. The results from 2 self-paced reading experiments supported this hypothesis. Low-span participants always read sentences with metaphoric anaphors slower than sentences with literal anaphors. In contrast, high-span participants did not take longer to read sentences with metaphoric anaphors than those with literal anaphors when the preceding context activated enough information to facilitate reference resolution. However, when the context activated so much information that the metaphor's function was obviated, high-span readers suffered and again read sentences with metaphoric anaphors more slowly than sentences with literal anaphors. These results show that, as with other types of anaphors, processing metaphoric anaphors is affected by working memory performance, and that the balance between processing cost and discourse function varies with working memory ability.

Antecedent Priming at Trace Positions in Children’s Sentence Processing

The present study examines whether children reactivate a moved constituent at its gap position and how children’s more limited working memory span affects the way they process filler-gap dependencies. 46 5–7 year-old children and 54 adult controls participated in a cross-modal picture priming experiment and underwent a standardized working memory test. The results revealed a statistically significant interaction between the participants’ working memory span and antecedent reactivation: High-span children (n = 19) and high-span adults (n = 22) showed evidence of antecedent priming at the gap site, while for low-span children and adults, there was no such effect. The antecedent priming effect in the high-span participants indicates that in both children and adults, dislocated arguments access their antecedents at gap positions. The absence of an antecedent reactivation effect in the low-span participants could mean that these participants required more time to integrate the dislocated constituent and reactivated the filler later during the sentence.

Antecedent Priming at Trace Positions in Children’s Sentence Processing

The present study examines whether children reactivate a moved constituent at its gap position and how children's more limited working memory span affects the way they process filler-gap dependencies. 46 5-7 year-old children and 54 adult controls participated in a cross-modal picture priming experiment and underwent a standardized working memory test. The results revealed a statistically significant interaction between the participants' working memory span and antecedent reactivation: High-span children (n = 19) and high-span adults (n = 22) showed evidence of antecedent priming at the gap site, while for low-span children and adults, there was no such effect. The antecedent priming effect in the high-span participants indicates that in both children and adults, dislocated arguments access their antecedents at gap positions. The absence of an antecedent reactivation effect in the low-span participants could mean that these participants required more time to integrate the dislocated constituent and reactivated the filler later during the sentence.

What happens to information to be suppressed in working-memory tasks? Short and long term effects.

The study explored, from an individual differences point of view, what happens to information to be suppressed in a working-memory task at short and long term. In particular, it was examined whether control mechanisms of irrelevant information in working memory imply their complete elimination from working memory or just the modulation of their activation. To this end, we compared the fate of irrelevant information in groups of subjects with high and low reading comprehension (Experiments 1 and 2) and subjects with high and low working memory (Experiments 1, 2, 3, and 4). All the experiments presented a working-memory task devised by De Beni, Palladino, Pazzaglia, and Cornoldi (1998), which required participants to process lists of words, to tap when a word from a particular category was presented, and then to recall only the last items in each list. Results confirmed that participants with high reading comprehension also have higher working memory and make less intrusion errors due to irrelevant items that have to be processed but then discarded. Furthermore, it was found that participants with low working memory have slightly better implicit (Experiment 1) and explicit memory (Experiments 3 and 4) of highly activated irrelevant information. Nevertheless, in a long-term recognition test, participants with high and low reading comprehension/working memory presented a similar pattern of memory for different types of irrelevant information (Experiment 2), whereas in a short-term memory recognition test, low-span participants presented a facilitation effect in the time required for the recognition of highly activated irrelevant information (Experiment 4). It was concluded that efficient working-memory performance is related to the temporary reduction of activation of irrelevant information but does not imply its elimination from memory.

Dissociable brain mechanisms for inhibitory control: effects of interference content and working memory capacity

In this study, event-related fMRI was used to examine whether the resolution of interference arising from two different information contents activates the same or different neuronal circuitries. In addition, we examined the extent to which these inhibitory control mechanisms are modulated by individual differences in working memory capacity. Two groups of participants with high and low working memory capacity [high span (HS) and low span (LS) participants, respectively] performed two versions of an item recognition task with familiar letters and abstract objects as stimulus materials. Interference costs were examined by means of the recent negative probe technique with otherwise identical testing conditions across both tasks. While the behavioral interference costs were of similar magnitude in both tasks, the underlying brain activation pattern differed between tasks: The object task interference-effects (higher activation in interference trials than in control trials) were restricted to the anterior intraparietal sulcus (IPS). Interference effects for familiar letters were obtained in the anterior IPS, the left postero-ventral and the right dorsolateral prefrontal cortex (PFC) as well as the precuneus. As the letters were more discernible than the objects, the results suggest that the critical feature for PFC and precuneus involvement in interference resolution is the saliency of stimulus-response mappings. The interference effects in the letter task were modulated by working memory capacity: LS participants showed enhanced activation for interference trials only, whereas for HS participants, who showed better performance and also lower interference costs in the letter task, the above-mentioned neuronal circuitry was activated for interference and control trials, thereby attenuating the interference effects. The latter results support the view that HS individuals allocate more attentional resources for the maintenance of task goals in the face of interfering information from preceding trials with familiar stimulus materials.

Working Memory and Lexical Ambiguity Resolution as Revealed by ERPs: A Difficult Case for Activation Theories

AbstractThis series of three event-related potential experiments explored the issue of whether the underlying mechanism of working memory (WM) supporting language processing is inhibitory or activational in nature. These different cognitive mechanisms have been proposed to explain the more efficient processing of subjects with a high WM span compared to those with a low WM span. Participants with high and low WM span were presented with sentences containing a homonym followed three words later by a nominal disambiguation cue and a final disambiguation using a verb. At the position of the disambiguation cue, inhibitory or activational WM mechanisms predict contrasting results. When activation is the underlying mechanism for efficient processing, the prediction is that high memory span persons activate both meanings of the homonym equally in WM, whereas low memory span persons only have one meaning present. When inhibition is the underlying mechanism, the predictions are the reverse. The ERP data, in particular, the variations of the meaning related N400 component, showed clear evidence for inhibition as the underlying cognitive mechanism in high-span readers. For low-span participants the cueing towards the dominant or the subordinate meaning elicited an equivalently large N400 component suggesting that both meanings are active in WM. In highspan subjects, the dominant disambiguation cue elicited a smaller N400 than the subordinate one, indicating that for these subjects particularly the dominant meaning is active. The experiments showed that inhibitory processes are probably underlying WM used during language comprehension in high-span subjects. Moreover, they demonstrate that these subjects can use their inhibition in a more flexible manner than low-span subjects. The effects that these processing differences have on the efficiency of language parsing are discussed.