Cognitive Offloading: Structuring the Environment to Improve Children's Working Memory Task Performance

Beyond Routine Maintenance: Current Trends in Working Memory Research

Working memory (WM) is an evolving concept. Our understanding of the neural functions that support WM develops iteratively alongside the approaches used to study it, and both can be profoundly shaped by available tools and prevailing theoretical paradigms. Here, the organizers of the 2024 Working Memory Symposium-inspired by this year's meeting-highlight current trends and looming questions in WM research. This review is organized into sections describing (1) ongoing efforts to characterize WM function across sensory modalities, (2) the growing appreciation that WM representations are malleable to context and future actions, (3) the enduring problem of how multiple WM items and features are structured and integrated, and (4) new insights about whether WM shares function with other cognitive processes that have conventionally been considered distinct. This review aims to chronicle where the field is headed and calls attention to issues that are paramount for future research.

Generative AI tool use enhances academic achievement in sustainable education through shared metacognition and cognitive offloading among preservice teachers

The integration of generative artificial intelligence tools in education has emerged as a transformative approach to enhancing learning outcomes, particularly in the context of sustainable development goals (SDG4). Therefore, the present study investigates the connection between generative artificial intelligence tool usage (GenAITU) and academic achievement (AA) in the context of SDG4. We assessed the mediating role of shared metacognition (SMC) and cognitive offloading (COL) in this relationship among preservice teachers (PSTs). The indicators, including performance expectancy (PE), effort expectancy (EE), facilitating conditions (FC), and use behavior (UB), are derived from adapting the Unified Theory of Acceptance and Use of Technology 2 (UTAUT2) for GenAITU. The authors surveyed 465 students from five universities in Wuhan, China, using a 7-point Likert scale through a time-lag design. Statistical analysis was performed through partial least squares structural equation modeling (PLS-SEM), to determine the relationship between variables. Findings indicated that two components of GenAITU, namely PE and UB, showed significant positive associations with AA, while the other two, EE and FC, did not show significant and positive relationships with AA. Results also showed that three dimensions of GenAITU, namely EE, FC, and UB have a positive and significant association with SMC while PE has a positive and significant connection with SMC. All four components of GenAITU like PE, EE, FC, and UB have positive and significant links with COL. SMC and COL have a positive and significant relationship with AA. Results also indicated that SMC mediated the connections between GenAITU (EE, FC, and UB) and AA. Outcomes also indicated that COL mediated the connections between GenAITU (PE, EE, FC, and UB) and AA. The current study shows that SMC and COL were strong mediators of the association between GenAITU and AA. The results of our study provide guidance to teachers, curriculum planners, and university management to successfully integrate GenAITU into the education for PSTs.

The development of social offloading

Across two experiments, we explored the conditions under which 4- to 11-year-old children (N = 138) were more likely to seek social cognitive helpers and whether they preferentially relied on help from those that had previously shown proficiency in a relevant cognitive context. Children completed a memory task with varying levels of difficulty, after which they were introduced to two characters that exhibited either a high memory ability (task-relevant) or a high motor skill ability (task-irrelevant) in a distinct context. Children then completed the memory task a second time with the option to choose one of the two characters to assist them. From 6 years of age, children preferentially offloaded memory demand onto the character that had previously demonstrated a high memory ability and were also more likely to ask for help on difficult trials compared with easy trials. Our results also indicated potential differences in factors influencing children's social and nonsocial cognitive offloading decisions.

Differences between children and young adults in the effects of difficulty and value of learning items on cognitive offloading strategies

Cognitive offloading refers to the use of external tools to assist in memory processes.This study investigates the effects of item difficulty and value on cognitive offloading during a word-pair learning task, comparing children and young adults in a context where both cues coexist. In Experiment 1, we examined the impact of difficulty and value cues on cognitive offloading using a 2 (difficulty: easy vs. difficult) × 2 (value: high vs. low) × 2 (age group: children vs. young adults) mixed design.The results indicated that young adults accounted for both difficulty and value cues in their cognitive offloading strategies, in contrast to children, who relied only on difficulty cues. In Experiment 2, we retained the experimental design of Experiment 1, with one notable change: difficulty and value cues were simultaneously displayed on the same interface. This change aimed to reduce working memory load, thereby helping children better perceive the value cues. Our results showed that when value and difficulty cues were presented on the same interface, children took both cues into account in their cognitive offloading decisions. In contrast, young adults were more influenced by the value of the learning items when adopting cognitive offloading strategies. We conducted an exploratory analysis to examine the impact of serial position on offloading decisions. The results showed that children were more likely to use cognitive offloading strategies for items from the early and middle positions than for those from the later positions. In contrast, young adults (as observed in Experiment 2) tended to use cognitive offloading strategies for items from the middle positions. Our findings suggest that age affects the utilization of cues in the strategies of cognitive offloading. We interpreted the observed differences in cognitive offloading strategies through the lens of developmental changes in metacognitive abilities.

Children's emerging ability to balance internal and external cognitive resources

Australian children aged 6-9 years (N = 120, 71 females; data collected in 2021-2022) were tasked with remembering the locations of 1, 3, 5, and 7 targets hidden under 25 cups on different trials. In the critical test phase, children were provided with a limited number of tokens to allocate across trials, which they could use to mark target locations and assist future memory performance. Following the search period, children were invited to adjust their previous token allocation. Although 8- to 9-year-olds prospectively allocated proportionately more tokens to more difficult trials, 6- to 7-year-olds did so only in retrospect. During middle childhood, humans become increasingly adept at weighing up when to rely on their unaided capacities and when to offload cognitive demand.

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.

My Tablet's About to Go Dead! 5- to 6-year-old Children Adjust Their Cognitive Strategies Depending on Whether An External Resource is Reliably Available

There are concerns that reliance on external resources (e.g., information on digital devices) may be harmful to our own internal memory. Here, in a pre-registered study, we investigated how the reliability of an external resource (i.e., whether the information will be available when needed) affects young children's use of it. In our tablet-based Shopping Game, children picked items from a store based on a shopping list. Importantly, the store and the list were not visible simultaneously, but children could toggle between them. In the reliable condition, the list was always available. In the unreliable condition, children were led to believe that the list might disappear. We found that 5-6-year-old children (N = 37) relied more on the list - referring back to it more often and more briefly, and remembering fewer items - when they perceived the list as reliably available (and vice versa, reducing trips to the list by studying it longer, and remembering more, when it was perceived as unreliably available). Nearly all children also identified the reliable condition as easier and preferred. In short, young children not only recognize the opportunity provided by reliably available external resources, but adapt their cognitive effort accordingly.

Influence of the physical effort of reminder-setting on strategic offloading of delayed intentions

Intention offloading involves using external reminders such as diaries, to-do lists, and digital alerts to help us remember delayed intentions. Recent studies have provided evidence for various cognitive and metacognitive factors that guide intention offloading, but little research has investigated the physical cost of reminder-setting itself. Here, we present two pre-registered experiments investigating how the cost of physical effort associated with reminder-setting influences strategic intention offloading under different levels of memory load. At all memory loads, reminder-setting was reduced when it was more effortful. The ability to set reminders allowed participants to compensate for the influence of memory load on accuracy in the low-effort condition; this effect was attenuated in the high-effort condition. In addition, there was evidence that participants with less confidence in their memory abilities were more likely to set reminders. Contrary to prediction, physical effort had the greatest effect on reminder-setting at intermediate memory loads. We speculate that the physical costs of reminder-setting might have the greatest impact when participants are uncertain about their strategy choice. These results demonstrate the importance of physical effort as one of the factors relevant to cost-benefit decision-making about cognitive offloading strategies.

Large-scale assessment of 7-11-year-olds' cognitive and sensorimotor function within the Born in Bradford longitudinal birth cohort study

Background: Cognitive ability and sensorimotor function are crucial aspects of children's development, and are associated with physical and mental health outcomes and educational attainment. This paper describes cross-sectional sensorimotor and cognitive function data collected on over 15,000 children aged 7-10 years, collected as part of the Born in Bradford (BiB) longitudinal birth-cohort study. Methodological details of the large-scale data collection process are described, along with initial analyses of the data involving the relationship between cognition/sensorimotor ability and age and task difficulty, and associations between tasks. Method: Data collection was completed in 86 schools between May 2016 and July 2019. Children were tested at school, individually, using a tablet computer with a digital stylus or finger touch for input. Assessments comprised a battery of three sensorimotor tasks (Tracking, Aiming, & Steering) and five cognitive tasks (three Working Memory tasks, Inhibition, and Processing Speed), which took approximately 40 minutes. Results: Performance improved with increasing age and decreasing task difficulty, for each task. Performance on all three sensorimotor tasks was correlated, as was performance on the three working memory tasks. In addition, performance on a composite working memory score correlated with performance on both inhibition and processing speed. Interestingly, within age-group variation was much larger than between age-group variation. Conclusions: The current project collected computerised measures of a range of cognitive and sensorimotor functions at 7-10 years of age in over 15,000 children. Performance varied as expected by age and task difficulty, and showed the predicted correlations between related tasks. Large within-age group variation highlights the need to consider the profile of individual children in studying cognitive and sensorimotor development. These data can be linked to the wider BiB dataset including measures of physical and mental health, biomarkers and genome-wide data, socio-demographic information, and routine data from local health and education services.

The role of inhibitory control and ADHD symptoms in the occurrence of involuntary thoughts about the past and future: An individual differences study

In everyday life, people often experience involuntary thoughts about their personal past and future events in response to incidental cues in the environment. Yet, despite the abundance of such cues, our consciousness is not constantly flooded by these involuntary autobiographical memories (IAMs) and involuntary future thoughts (IFTs). The main goal of the present study was to further investigate the possibility that cognitive inhibitory control keeps these involuntary cognitions at bay. To test this inhibition hypothesis, we conducted a large-scale study (n = 157) in which groups of participants with different levels of inhibitory control (low, medium, high) and individuals with ADHD spectrum symptoms were engaged in a laboratory vigilance task in which the frequency of IFTs and IAMs was assessed. Contrary to predictions, although participants across groups differed significantly in terms of their individual inhibitory control capacity, the number of IFTs and IAMs reported during the vigilance task was comparable. In addition, individuals with the ADHD spectrum symptoms did not report more spontaneous thoughts compared to other groups. Together, these findings lend little support for the idea that inhibition is a key mechanism that regulates the occurrence of IAMs and IFTs in everyday life. Other possible mechanisms and avenues for future research are discussed.

Children boost their cognitive performance with a novel offloading technique

Ninety-seven children aged 4-11 (49 males, 48 females, mostly White) were given the opportunity to improve their problem-solving performance by devising and implementing a novel cognitive offloading strategy. Across two phases, they searched for hidden rewards using maps that were either aligned or misaligned with the search space. In the second phase, maps were presented on rotatable turntables, thus allowing children to manually align all maps and alleviate mental rotation demand. From age six onwards, children showed strong evidence of both mentally rotating misaligned maps in phase 1 and manually aligning them in phase 2. Older children used this form of cognitive offloading more frequently, which substantially improved performance and eliminated the individual differences observed in phase 1.

To organise or not to organise? Understanding search strategy preferences using Lego building blocks

Humans routinely organise or reconfigure the environment as part of their everyday activities, such as placing a set of keys in a designated location to reduce the need to remember its location. This type of spatial organisation is widely thought to reduce both the physical and cognitive demands of a task to allow individuals to perform tasks more easily. Although spatial organisation can be a useful strategy when searching for items in the environment, individuals do not always choose to utilise these organisational strategies when carrying out everyday tasks. Across three experiments, we examined individuals' preference for spatial organisation in the context of a real-world search task, and the degree to which individuals engaged in time- and effort-based cost-benefit analysis to inform whether to choose between an organisation-based or non-organisation-based search strategy. We found that individuals' strategy preferences could be explained by the perceived task time associated with each strategy, but not perceived task effort. However, even statistically controlling for relative perceived task time or reported effort, participants showed a strong systematic preference against organisation prior to engaging in the task, and, post-task, a strong preference towards organisation. Implications for understanding individuals' use of spatial organisation are discussed.

Large-scale assessment of 7-11-year-olds’ cognitive and sensorimotor function within the Born in Bradford longitudinal birth cohort study

Background: Cognitive ability and sensorimotor function are crucial aspects of children’s development, and are associated with physical and mental health outcomes and educational attainment. The current project forms part of the Born in Bradford (BiB) longitudinal birth-cohort study, and involved measuring sensorimotor and cognitive function in over 15,000 children aged 7-10 years. This paper describes the large-scale data collection process and presents initial analyses of the data, including the relationship between cognition/sensorimotor ability and age and task difficulty, and associations between tasks. Method: Data collection was completed in 86 schools between May 2016 and July 2019. Children were tested at school, individually, using a tablet computer with a digital stylus or finger touch for input. Assessments comprised a battery of three sensorimotor tasks (Tracking, Aiming, & Steering) and five cognitive tasks (three Working Memory tasks, Inhibition, and Processing Speed), which took approximately 40 minutes. Results: Performance improved with increasing age and decreasing task difficulty, for each task. Performance on all three sensorimotor tasks was correlated, as was performance on the three working memory tasks. In addition, performance on a composite working memory score correlated with performance on both inhibition and processing speed. Interestingly, within age-group variation was much larger than between age-group variation. Conclusions: The current project collected computerised measures of a range of cognitive and sensorimotor functions at 7-10 years of age in over 15,000 children. Performance varied as expected by age and task difficulty, and showed the predicted correlations between related tasks. Large within-age group variation highlights the need to consider the profile of individual children in studying cognitive and sensorimotor development. These data can be linked to the wider BiB dataset including measures of physical and mental health, biomarkers and genome-wide data, socio-demographic information, and routine data from local health and education services.

Comparing motor imagery and verbal rehearsal strategies in children's ability to follow spoken instructions

The ability to follow spoken instructions is critical for children's learning in school and relies on the storage and processing of information in working memory. This study compared the effects of two encoding strategies (motor imagery and verbal rehearsal) on children's ability to follow spoken instructions in a working memory paradigm. A total of 146 children aged 7-12 years completed an instruction span task. In this task, children listened to a series of action-object commands and encoded them by either motor imagery or verbal rehearsal. They then attempted to recall the sequence in serial order by either enacted recall or verbal recall. Overall, children's ability to follow spoken instructions increased with age. In all age groups, children showed superior recall of instructions when they imagined the actions compared with verbal rehearsal of the actions during encoding, and this benefit of motor imagery was similar for verbal recall and enacted recall. Younger children reported motor imagery as more helpful than verbal rehearsal for remembering instructions, whereas older children considered verbal rehearsal as more useful. The study provides novel evidence for motor imagery as a superior strategy (relative to verbal rehearsal) for remembering spoken instructions in school-age children.

Developmental origins of cognitive offloading

Many animals manipulate their environments in ways that appear to augment cognitive processing. Adult humans show remarkable flexibility in this domain, typically relying on internal cognitive processing when adequate but turning to external support in situations of high internal demand. We use calendars, calculators, navigational aids and other external means to compensate for our natural cognitive shortcomings and achieve otherwise unattainable feats of intelligence. As yet, however, the developmental origins of this fundamental capacity for cognitive offloading remain largely unknown. In two studies, children aged 4-11 years (n = 258) were given an opportunity to manually rotate a turntable to eliminate the internal demands of mental rotation--to solve the problem in the world rather than in their heads. In study 1, even the youngest children showed a linear relationship between mental rotation demand and likelihood of using the external strategy, paralleling the classic relationship between angle of mental rotation and reaction time. In study 2, children were introduced to a version of the task where manually rotating inverted stimuli was sometimes beneficial to performance and other times redundant. With increasing age, children were significantly more likely to manually rotate the turntable only when it would benefit them. These results show how humans gradually calibrate their cognitive offloading strategies throughout childhood and thereby uncover the developmental origins of this central facet of intelligence.