Span Task Research Articles

The effect of inverting decades and units on the retention of two-digit numbers in working memory: a matter of the output mode.

Number-word structure affects transcoding and relates to working memory capacity (WMc). We tested the relationship between the structure of number-words (inverted "Units-Decades (UD) format" or not "Decades-Units (DU) format") and performance on the digit span task for recalling two-digit number-words presented verbally, using two modes of output. University students, native speakers of Arabic, who were also highly proficient in Hebrew, and native speakers of Hebrew, were asked to response by typing Arabic digits or recalling numbers verbally. Arabic and Hebrew speakers were equal in WMc for one-digit numbers in the two modes. However, when inversion was presented, performance was related to output and participants habits. In the typing response, both groups showed better performance for the DU format. In the native language (standard format), Arabic speakers (UD) remembered fewer numbers than Hebrew speakers (DU). Arabic speakers show inversion errors even in the noninverted format. For verbal responses, there were no differences between the groups in their standard format, and native speakers of Arabic weren't affected by the format, while Hebrew speakers still preferred the DU format. Experience with inverted and noninverted language affected WMc but is also related to the output demands.

Effects of single- and double-shift work on hand and cognitive functions in nurses.

This study aims to examine the influence of single and double-shift work schedules on hand function and cognitive capacities, specifically working memory, attention, and response time in nurses. Shift work, particularly in extended formats, is known to affect various physical and cognitive functions critical to nursing duties. Understanding these impacts is vital for managing nurse schedules to minimize health risks and maximize performance. With an increase in demands on healthcare systems, nurses often endure prolonged working hours, which may impair their cognitive and manual abilities, thereby affecting patient care quality. This study involved 45 nurses aged 20-40 years from shift-oriented units providing direct patient care. Hand function was assessed using the Nine-Hole Peg Test (9-HPT). Cognitive functions such as working memory, attention, and response time were evaluated using the digit span task and the Stroop test, respectively. Two-way analysis of variance (ANOVA) was used for statistical analysis, assessing the interactions of time and shift type, with a significance level set at p<0.05. The results revealed significant changes in all tested variables between pre- and post-shift assessments and between single and double-shift conditions. Notably, the double-shift work significantly exacerbated declines in all measured functions. These findings suggest that double shifts may intensify the deterioration of essential nursing skills, potentially compromising patient care. This study underscores the detrimental effects of extended shift work on nurses' cognitive and manual functions. These insights should guide healthcare institutions in revising nurse scheduling practices to safeguard their well-being and maintain high standards of patient care.

Neighborhood frequency effects in simple and complex span: Do high-frequency neighbors help or hurt?

A word's orthographic neighborhood is the set of words that differ from the target word by one letter. Both Roodenrys (2009) and Robert et al. (Journal of Psycholinguistic Research, 44, 119-125, 2015) posit that orthographic neighbors are activated when the target word is encountered in tasks such as simple and complex span. The two accounts differ in that the former predicts a beneficial effect of this activation, because it produces feedback activation that helps redintegrate the target word, whereas the latter predicts a detrimental effect, because the need to overcome the greater interference from the larger number of higher-frequency items reduces the processing resources available. Four experiments assess the predictions of these two accounts. Experiments 1 and 2 found a beneficial effect of having a higher- compared with a lower-frequency neighborhood in both a simple and a complex span task. Experiments 3 and 4 found no detrimental effect of having one or more neighbors with higher frequency than the target in both a simple and complex span task. Implications for the two theories are discussed.

Physical Fitness, Executive Functions, and Academic Performance in Children and Youth: A Cross-Sectional Study

The aim of this cross-sectional study was to investigate the relationship between physical fitness, executive function, and academic performance in children and adolescents. A total of 131 students (49% female) aged 10–15 years from a public school in Rio de Janeiro were assessed in executive functions (hearts and flowers, Corsi’s block, and digit span tasks), academic performance (Portuguese, reading, math, and overall school grade), physical tests (touch test disc, agility, lower limb and upper limb explosive strength), and anthropometric measurements. Regression results showed that the composite of sports-related fitness measures was the best predictor of executive functions (β = 0.472; t = −6.075 p &lt; 0.001). Decision tree classifier analysis showed that the combination of factors that discriminated better and worse executive function groups were better performance in hand–eye coordination (TTD), math, and upper limb strength (ULEST). Sports-related fitness is significantly correlated with executive function. Hand–eye motor coordination has been identified as the most important predictor of improved cognitive outcomes, surpassing even academic skills. These findings should be considered in the design of physical activity programs in school settings, which may have a positive impact on child development, reflected in the reduction of academic and socioeconomic disparities.

The Role of Hearing Aids in Improving Dual-Task Gait Performance in Older Adults With Presbycusis: A Cognitive and Motor Analysis.

Cognitive decline is a common challenge faced by older individuals with presbycusis; their performance on dual-task (DT) activities is generally lower compared to those without hearing loss. However, the influence of hearing aids on nonauditory cognitive decline in this population remains unclear. This study aims to investigate the effect of hearing aids on nonauditory DT performance in older adults with presbycusis. This study included older people with presbycusis who used hearing aids (P&HA group), those with presbycusis who did not use hearing aids (PoHA group), and a control group of healthy adults. Forward and backward digit span tests and timed up and go test (TUG) were administered to all individuals. TUG and motor and cognitive (forward and backward digit span) tasks were applied simultaneously to evaluate the participants' DT performance. The study comprised 60 individuals with presbycusis (19 females, 41 males; mean age: 73.23±6.49years) and 30 healthy adults (15 females, 15 males; mean age: 35.93±8.57years). Healthy adults performed better than the P&HA and PoHA groups in all the administered tests (p<0.05). There was a moderate negative relationship between the severity of hearing loss and the forward and backward digit span test performances (p<0.05). The P&HA group performed better than the PoHA group on the DT cognitive forward and backward digit span tests. The use of hearing aids and their proper fitting are important not only for improving communication skills and reducing listening effort but also for supporting nonauditory cognitive functions, minimizing the risk of falls during DT activities, and enhancing the overall quality of life.

Distractor filtering and task load in working memory training in healthy older adults.

Filtering efficiency (FE) has been suggested as a task-related process of working memory (WM) in older adults, but the interaction of distractors with WM when implemented as a training to improve WM capacity is unclear. To investigate the effect of manipulations of WM and/or FE load in a multicomponent model-based WM training in improving WM capacity. 205 healthy older adults (129 women; aged 64.0 ± 8.3 years) were randomised into three WM training groups with manipulations of WM and FE load (high WM; low FE load, high WM; high FE load and low WM; high FE load). All groups underwent three online cognitive testing sessions and twelve 40-min training sessions over three weeks using the SmartBrain smartphone application. WM capacity was measured with complex span tasks and FE using the Change Detection Task. Linear mixed-effect models adjusted for age, sex, education and pre-baseline performance showed increased WM capacity post-training, but no difference between groups. While both distractors and WM are needed to improve WM in the absence of distraction, manipulations of the FE and WM load do not influence improvements following training.

Maternal trauma exposure is linked to adult offspring's cognitive functioning in the context of mass violence.

This study aimed to examine whether mothers' level of trauma exposure and posttraumatic stress disorder (PTSD) symptoms are related to their offspring's cognitive functioning. Mothers exposed to the 1994 genocide perpetrated against the Tutsi (N = 181) and one of their adult offspring were recruited in Rwanda. Mothers and their offspring answered questionnaires on sociodemographic information, the level of trauma exposure, and PTSD symptoms. They also performed a backward digit span task and a similarity task to assess their working memory and abstract reasoning, respectively. Hierarchical regression models were used to analyze the data. Mothers' level of trauma exposure, but not PTSD symptoms, was significantly related to their offspring's abstract reasoning performance after controlling for offspring's age, sex, and economic status. The relationship between mothers' level of trauma exposure, PTSD symptoms, and their offspring's working memory performance was not significant. Offspring's education was significantly linked to their working memory and abstract reasoning performance. The findings demonstrate that the intergenerational transmission of trauma can impact the cognitive functioning of the next generation. These results also illustrate the profound and long-term human impact of mass violence. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Effect of negative emotional stimuli on working memory: Impact of voluntary and automatic attention.

Emotions are known to influence cognitive performance, particularly working memory (WM) in both its aspects, processing, and maintenance. One explanatory mechanism might be that negative stimuli capture attentional resources, leaving fewer resources for attentional maintenance and processing of information in WM. However, this attentional capture was only investigated using WM tasks in which participants were explicitly asked to process negative items. The aim of this paper was to determine whether explicit processing of emotional stimuli is necessary to impair WM performance, or if their mere presence is enough to capture attention. For this purpose, participants performed a complex span task in which they alternated between memorizing a series of neutral words and processing either emotional images or neutral ones. In Experiment 1, participants were instructed to explicitly process emotional images, whereas in Experiment 2, emotional images were presented without any processing being required. In both experiments, we observed a decrease in memory performance when the images were negative compared to neutral. Whether or not voluntary processing is involved, emotional images seem to capture attentional resources, which in turn leads to a decline in memory performance. These results were discussed in relation to attentional theories and the influence of emotion on the specific mechanisms of WM.

Cognitively engaging exercise predicts executive functioning on laboratory tasks

The cognitive engagement hypothesis claims that regular exercise must be cognitively engaging in order to benefit executive functioning. However, the available evidence for this hypothesis is circumstantial. Here we test it directly in two studies. In Study 1, 145 young adults first reported the extent to which their primary exercise and non-exercise leisure activities were cognitively engaging. They then completed two well-known laboratory tasks measuring executive function: a flanker task to index inhibitory control and a backward digit span task to assess working memory. Structural equation modeling revealed that when participants reported that their exercise relied on inhibitory cognitive control, they performed better on the flanker task, and, when their exercise demanded cognitive flexibility, they performed better on a backward digit task. These relationships did not hold for their primary reported leisure activity. Study 2 confirmed this finding with an independent sample of 227 undergraduates and two different executive function tasks: a stop-signal task to index inhibitory control and a trail making B task to assess cognitive flexibility. When participants reported that their regular exercise relied on inhibitory control they had faster stop-signal reaction times and made fewer trail making errors, and, when their exercise relied on cognitive flexibility, they had slower stop-signal reaction times and longer trail making B completion times. These relationships were again not found for participants’ leisure activities. These findings support the claim that exercise is associated with cognitive performance on laboratory tasks, provided the exercise is itself cognitively demanding.

Listening to two-talker conversations in quiet settings: the role of listeners’ cognitive processing capabilities for memory and listening effort

Listening to conversing talkers in quiet environments and remembering the content is a common activity. However, research on the cognitive demands involved is limited. This study investigates the relevance of individuals’ cognitive functions for listeners’ memory of two-talker conversations and their listening effort in quiet listening settings. A dual-task paradigm was employed to explore memory of conversational content and listening effort while analyzing the role of participants’ (n = 29) working memory capacity (measured through the operation span task), attention (Frankfurt attention inventory 2), and information-processing speed (trail making test). In the primary task, participants listened to a conversation between a male and female talker and answered content-related questions. The two talkers’ audio signals were presented through headphones, either spatially separated (+ /– 60°) or co-located (0°). Participants concurrently performed a vibrotactile pattern recognition task as a secondary task to measure listening effort. Results indicated that attention and processing speed were related to memory of conversational content and that all three cognitive functions were related to listening effort. Memory performance and listening effort were similar for spatially separated and co-located talkers when considering the psychometric measures. This research offers valuable insights into cognitive processes during two-talker conversations in quiet settings.

Aging Processes of Working Memory in Different Modalities.

Background: Working memory (WM) involves temporarily storing and manipulating information. Research on the impact of aging on WM has shown inconsistent results regarding the decline in visual and verbal WM, with a lack of studies on tactile WM. This study aimed to assess the effects of aging on WM across verbal, visuospatial, and tactile modalities using span tasks of forward (storage) and backward (manipulation) stages. Methods: A total of 130 participants, divided into four age groups of 20-29, 60-69, 70-79, and 80-89, completed the Digit, Visuospatial, and Tactual Spans. Performance was analyzed using a 3 (Task) × 4 (Group) × 2 (Stage) mixed design repeated measures ANOVA. Results: The analysis revealed significant main effects for modality (p < 0.001, ηp2 = 0.15), age (p < 0.001, ηp2 = 0.48), and stage (p < 0.001, ηp2 = 0.30). Digit Span outperformed the other modalities, while Tactual Span showed the worst performance. Additionally, task performance declined with age, and the forward stage was superior to the backward stage. Interaction effects indicated that Digit Span was less affected by aging compared to the Visuospatial and Tactual Spans (p = 0.004, ηp2 = 0.07). Post hoc analyses further revealed that the Digit Span consistently outperformed the other modalities in both stages, with more pronounced differences observed in the forward stage. Conclusions: Verbal WM is more resilient to aging compared to the other modalities while tactile WM declines with age in a manner similar to verbal and visuospatial WM, suggesting a modality-specific impact of aging on WM.

Effects of Time Intervals and Semantic Weight on Action Fluency Tasks in Older Adults

Objectives: The purpose of this study was to investigate the differences in performance of action fluency tasks (AFT) based on time intervals and the semantic weight of verbs among groups of healthy young and older adults and to explore the correlation between working memory and the performance. Methods: A total of 62 Korean-speaking individuals, consisting of 31 healthy young and older adults, participated in the AFT and their performance was analyzed by the semantic weight of verbs (Heavy vs. Light) and time interval (first 30 sec vs. last 30 sec). They also participated in a working memory task. To measure working memory capacity, word span tasks (WST) - forward and backward were conducted. Results: In both groups, performance on the AFT was higher in the first 30 sec and there were more productions of heavy verbs compared to light verbs. Additionally, a positive correlation was observed in the older adults between the number of heavy verbs produced in both the first 30 sec and last 30 sec and the scores on the WST-backward. Conclusion: In this study, through a qualitative analysis based on time intervals and semantic weight, we confirmed that the first 30 sec of the AFT can be a useful source for analyzing results. Furthermore, it highlighted that the semantic weight of verbs could serve as an efficient method for predicting aging.

Empirical evidence of the role of executive functions in tolerance of emotional distress

ABSTRACT Executive functions are domain general and therefore coordinate other processes, such as emotion regulation. One emotion regulation skill that has gained interest in the last decade is distress tolerance (DT), but its relationship with executive functions has been poorly explored. The aim of this study is to investigate the relationships between executive functions and self-perceived and behavioural DT. A total of 196 university students (age: M = 22.63 years; SD = 3.26) completed a Reading Span Task, the Five Digits Test, the Paced Auditory Serial Addition Task, and the Distress Tolerance Scale. Better executive functioning was related to higher self-perceived DT. Regarding behavioural DT, students with high DT showed greater cognitive flexibility and greater inhibition than students with low behavioural DT (no differences were found for working memory). The study contribute to the knowledge of the relationships between cognitive and emotional self-regulatory processes and provides a starting point for future research.

On the lasting impact of mild traumatic brain injury on working memory: Behavioural and electrophysiological evidence

Despite increasing recognition of the significance of mild traumatic brain injury (mTBI), the long-term cognitive consequences of the injury remain unclear. More sensitive measures that can detect subtle cognitive changes and consideration of individual variability are needed to properly characterise cognitive outcomes following mTBI. Here, we used complex behavioural tasks, individual differences approaches, and electrophysiology to investigate the long-term cognitive effects of a history of mTBI. In Experiment 1, participants with self-reported mTBI history (n=82) showed poorer verbal working memory performance on the operation span task compared to control participants (n=88), but there were no group differences in visual working memory, multitasking, cognitive flexibility, attentional control, visuospatial ability, or information processing speed. Individual differences analyses revealed that time since injury and presence of memory loss predicted visual working memory capacity and visuospatial ability, respectively, in those with mTBI history. In Experiment 2, participants with mTBI history (n=20) again demonstrated poorer verbal working memory on the operation span task compared to control participants (n=38), but no group differences were revealed on a visuospatial complex span task or simpler visual working memory measures. We also explored the electrophysiological indices of visual working memory using EEG during a change detection task. No differences were observed in early sensory event-related potentials (P1, N1) or the later negative slow wave associated with visual working memory capacity. Together, these findings suggest that mTBI history may be associated with a lasting, isolated disruption in the subsystem underlying verbal working memory storage. The results emphasise the importance of sensitive cognitive measures and accounting for individual variability in injury characteristics when assessing mTBI outcomes.

QSM-detected iron accumulation in the cerebellar gray matter is selectively associated with executive dysfunction in non-demented ALS patients.

This study aimed to assess whether quantitative susceptibility imaging (QSM)-based measures of iron accumulation in the cerebellum predict cognitive and behavioral features in non-demented amyotrophic lateral sclerosis (ALS) patients. A total of ALS patients underwent 3-T MRI and a clinical assessment using the ALS Functional Rating Scale-Revised (ALSFRS-R) and the Edinburgh Cognitive and Behavioural ALS Screen (ECAS). Regression models were applied to each subscale of the cognitive section of the ECAS and the ECAS-Carer Interview to examine the effect of QSM-based measures in white and gray matter (WM; GM) of the cerebellum, separately for right, left, and bilateral cerebellar regions of interest (ROIs). These effects were compared to those of cerebellar volumetrics in WM/GM, right and left hemispheres while controlling for demographics, disease status, and total intracranial volume. Higher QSM measures of the cerebellar GM on the left, right, and bilateral sides significantly predicted (ps ≤ 0.003) a greater number of errors on the executive functioning (EF) subscale of the ECAS (ECAS-EF). Moreover, higher GM-related, QSM measures of the cerebellum were associated with an increased probability of a below-cut-off performance on the ECAS-EF (ps ≤ 0.024). No significant effects were observed for QSM measures of the cerebellar WM or for volumetric measures on the ECAS-EF. Other ECAS measures showed no significant effects. Bilateral QSM measures of the cerebellar GM also selectively predicted performance on backward digit span and social cognition tasks. Iron accumulation within the cerebellar GM, particularly in the cerebellar cortices, may be associated with executive functioning deficits in non-demented ALS patients. Therefore, QSM-based measures could be useful for identifying the neural correlates of extra-motor cognitive deficits in ALS patients.

Passive and Active Components of Working Memory and Transcription Skills among First-Graders

Transcription skills allow us to put spoken language into written text, and they entail handwriting processes and spelling knowledge. Handwriting and spelling are supported by different processes, but they are highly related. Additionally, both are directly supported by working memory (WM). The present study aims to examine how differently passive and active components of WM affect transcription (handwriting and spelling) among Italian beginner writers. We evaluated 395 Italian first-grade children (197 boys and 198 girls) with an average age of 6 years and 6 months (SD = 4.3 months) with five writing tasks (three handwriting tasks and two spelling tasks) and two WM tasks (passive components = span task; active components = selective span task). We computed a SEM analysis to investigate how differently the passive and active WM components affect the two spelling tasks both directly and via handwriting. Passive and active WM components directly affect handwriting; while spelling is directly affected by the active WM, and indirectly (via handwriting) by both WM components. These results confirmed the crucial role of handwriting in predicting spelling accuracy. In conclusion, current results show that the distinction between passive and active WM components is useful to understand how WM supports transcription processes.

The Role of Working Memory Capacity in L2 Vocabulary Learning Among Saudi EFL Students

Acquiring a second language (L2) involves complex cognitive processes, where working memory (WM) plays a crucial role. This study investigates the relationship between WM capacity and L2 vocabulary acquisition among 100 Saudi EFL learners, focusing on first-year university students. Utilizing the Automated Operation Span Task (AOSPAN) to measure WM capacity and a custom-designed vocabulary test, the study found significant correlations between WM capacity and vocabulary retention, immediate recall, and usage in context. The experimental group, which received WM training, outperformed the control group across all measures. These findings underscore the importance of WM in L2 vocabulary learning and suggest that WM training can enhance vocabulary acquisition. The study's implications for educational practices are discussed, highlighting the potential for integrating WM training into language curricula to support learners' vocabulary development. This research contributes to understanding cognitive factors in L2 learning and provides practical recommendations for educators to enhance vocabulary teaching strategies for learners with varying WM capacities.

Acute caffeine administration impaired spatial working memory in habitual coffee/tea drinkers: A randomized, placebo-controlled, double-blind study

BackgroundAlthough coffee consumption is widespread worldwide, a recent study showed that acute intake of caffeine negatively affects working memory (WM) performance on n-back tasks among habitual caffeine consumers. However, there is a scarcity of double-blind, placebo-controlled studies that assess the spatial WM (SWM) effects of caffeine using spatial span tasks. Therefore, the present study aimed examine the effects of acute caffeine administration (200 mg, PO) on SWM and verbal WM (VWM) among habitual caffeine consumers. MethodsThe effects of caffeine on working memory (WM) was evaluated through the administration of backward digit span and spatial span tasks under a delay-dependent condition (0, 4, 8, and 6 s) in a randomized, double-blind, placebo-controlled study involving 18 healthy participants. This data is derived from our previous published study. The total scores obtained and the maximum scores achieved were the primary outcome variables of the study. ResultsCaffeine had a significant impact on SWM (maximum obtained, p = 0.013; for total scored, p = 0.007) in a delay-independent manner. However, there were no significant main effects of caffeine on VWM (p = 0.82 for maximum obtained, p = 0.56 for total scored). ConclusionOverall, the present findings contradict the commonly held belief that caffeine improves cognitive performance and suggest that acute administration of caffeine may impair SWM in habitual coffee/tea drinkers. Clinical Trial Registration NumberCT-2018-CTN-02561 (Therapeutic Goods Administration Clinical Trial Registry) and ACTRN12618001292268 (The Australian New Zealand Clinical Trials Registry)

Eight brain structures mediate the age-related alterations of the working memory: forward and backward digit span tasks.

Working memory (WM) as one of the executive functions is an essential neurocognitive ability for daily life. Findings have suggested that aging is often associated with working memory and neural decline, but the brain structures and resting-state brain networks that mediate age-related differences in WM remain unclear. A sample consisting of 252 healthy participants in the age range of 20 to 70years was used. Several cognitive tasks, including the n-back task and the forward and backward digit span tests were used. Also, resting-state functional imaging, as well as structural imaging using a 3T MRI scanner, were performed, resulting in 85 gray matter volumes and five resting-state networks, namely the anterior and posterior default mode, the right and left executive control, and the salience networks. Also, mediation analyses were used to investigate the role of gray matter volumes and resting-state networks in the relationship between age and WM. Behaviorally, aging was associated with decreased performance in the digit span task. Also, aging was associated with a decreased gray matter volume in 80 brain regions, and with a decreased activity in the anterior default mode network, executive control, and salience networks. Importantly, the path analysis showed that the GMV of the medial orbitofrontal, precentral, parieto-occipital, amygdala, middle occipital, posterior cingulate, and thalamus areas mediated the age-related differences in the forward digit span task, and the GMV of superior temporal gyrus mediated the age-related differences in the backward digit span task. This study identified the brain structures mediating the relationship between age and working memory, and we hope that our research provides an opportunity for early detection of individuals at risk of age-related memory decline.

Laterality in tactile working memory: The one-hand version of the Tactual Span.

The Tactual Span assesses tactile working memory (WM) using both hands while applying forward and backward conditions. The study objectives were to validate a one-hand version of the Tactual Span and to evaluate WM laterality in the tactile modality. Of the 145 participants, 80 performed the Tactual Span with their right hand, and 65 performed it with their left hand. Moreover, all participants performed two span tasks in the visuo-spatial and auditory modalities, each encompassing forward and backward conditions. Results revealed adequate Cronbach's alpha values for each hand in both conditions of the Tactual Span, along with a positive correlation between forward and backward conditions in each hand. However, overall performance on the Tactual Span was poorer compared to performance on the Auditory and Visuo-spatial Spans. Furthermore, in the forward condition, there was a correlation between the Auditory Span and the Tactual Span, but only for the right hand. In the backward condition, the Auditory Span correlated with the Tactual Span in both hands. The findings indicate that there is no effect of hand laterality in tactile WM, showing the two hands are related to each other in their WM function. Additionally, the one-hand version of the Tactual Span is deemed useful for evaluating tactile WM and can therefore be used in empirical and clinical settings for neuropsychological assessment purposes.