PM Task Research Articles

From the lab to the classroom: Improving children's prospective memory in a natural setting.

Laboratory-based studies have shown that children's ability to remember intentions (i.e., prospective memory; PM) can be improved by asking them to imagine performing the PM task beforehand (i.e., episodic future thinking; EFT) or to predict their PM performance. Moreover, combining the two strategies resulted in an additional improvement in children's PM performance. However, the effectiveness of these encoding strategies on real-life PM tasks is still unknown. The aim of the present study was to evaluate the effect of EFT instructions, performance predictions, and of their combination on children's PM in a natural setting, namely in the classroom. Twelve classes composed by a total of 121 children (53% females) aged between seven and 9 years participated to the study. As a PM task, children were asked by their teachers to deliver a letter to their parents and to bring it back to school the next day. Children were divided into four groups: control, prediction, EFT, and the EFT + prediction group. Parent reports on children's everyday prospective and retrospective memory failures were also collected. Results showed that encoding strategies were effective in enhancing children's PM performance. However, differences compared to previous laboratory-based findings emerged since predicting PM performance resulted to be most effective in enhancing real-life PM performance. Moreover, parent reports were related to children's PM performance. These novel findings highlight the importance of studying PM interventions in natural settings in order to increase their ecological validity and inform educational practices.

Sensory modality affects the spatiotemporal dynamics of alpha and theta oscillations associated with prospective memory

BackgroundThe maintenance of an intention in memory (Prospective Memory, PM) while performing a task is associated with a cost in terms of both performance (longer response times and lower accuracy) and neurophysiological modulations, which extent depends on several features of the stimuli. AimThis study explores the neural patterns associated with PM in different sensory modalities, to identify differences depending on this variable and discuss their functional meaning. MethodData were collected using a High-Density EEG during a baseline and a PM condition, proposed in a visual and an auditory version. Theta and alpha oscillations were compared between the two conditions within each modality using a cluster-based permutation approach. ResultsPM conditions were associated with clusters of decreased alpha and theta activity in both modalities. However, different spatiotemporal dynamics were elicited as a function of sensory modality: alpha decreases displayed an overlapping onset between modalities, but different durations, lasting longer in the auditory modality. Conversely, the clusters of decreased theta activity presented similar durations between modalities, but different temporal and spatial onsets, appearing at different moments over the respective sensory areas. ConclusionsThe similar spatiotemporal properties of alpha suppression between modalities indicate that such oscillations may represent a supramodal, top-down process, presumably reflecting the external direction of attention to successfully detect the prospective cue (strategic monitoring). In theta, the clusters showed more modality-specific differences, which temporal and spatial properties correspond to the ones necessary to perform the ongoing task, suggesting a shift in resource allocation in favor of the PM task.

Sometimes they show, sometimes they don't: Appointment attendance as a naturalistic prospective memory task

AbstractProspective memory (PM) refers to our ability to remember to complete future actions. One common everyday PM task that requires further attention is our ability to remember to attend scheduled appointments. The present study focused on appointment attendance as a naturalistic time‐based PM task and examined metacognitive factors associated with appointment keeping. We specifically measured self‐reported strategy use, perceived task importance, and everyday forgetting among individuals who successfully attended (Show) or failed to attend (No‐Show) a research appointment. Consistent with previous research, No‐Show participants often reported that they had simply forgotten to attend their scheduled appointment. Show participants were more likely to use strategies, particularly technology‐based strategies, compared to No‐Show participants. Furthermore, using a strategy improved the likelihood of attendance even if participants viewed attendance as less important or perceived themselves to have poor PM. Implications for improving appointment attendance and PM in daily life are discussed.

Can Feedback Boost Prospective Memory Performance?

Abstract Prospective memory (PM) refers to remembering to perform intended actions in the future. Although there is ample evidence supporting the benefits of feedback for memory, it is unclear whether these benefits can be extended to the field of PM. Therefore, 2 experiments were conducted to investigate the role of feedback in PM. Experiment 1 compared PM performance in 3 feedback conditions (no feedback, ongoing task feedback, PM feedback). Experiment 2 further examined the effects of feedback valence (positive feedback or negative feedback) on PM performance under different task loads (task variability). Results suggested that providing feedback improved PM performance. The fluctuation of costs to PM during different feedback phases reflected the dynamically strategic monitoring for PM, especially in the PM feedback condition. Additionally, a significant PM performance difference between positive feedback and negative feedback in the invariable condition was observed. More importantly, only under the variable condition did the fluctuation of costs to PM task with positive feedback increase from the baseline phase to the second feedback phase. This finding indicated positive feedback promoted PM performance accompanied by more cognitive resources needed for strategic monitoring, and negative feedback boosted PM performance, relying on spontaneous retrieval independent of cognitive resources. Altogether, feedback boosted PM, and this benefit varies depending on the type of feedback and task variability. These results reflected a flexible change in PM processes and supported the dynamic multiprocess view of PM.

Prospective memory in bilinguals: Recalling future intentions in first and second language contexts

AbstractRecalling future intentions (i.e., prospective memory, PM) plays an essential role in everyday life, but sometimes, if the person is involved in a demanding ongoing task, PM is unsuccessful. This is especially relevant for bilinguals who, in many situations, have to recall intentions while performing a task in their second language (L2). Our aim was to explore whether PM is modulated by the linguistic context in which PM takes place. In this study, bilinguals performed a PM task in their first (L1) or second language (L2). We also manipulated the demands of the ongoing task (early/late updating) and the PM cue (focal/non-focal). In general, results showed an overall impairment in the recall of future intentions when the task was performed in L2. This impairment was especially evident in the more demanding conditions, suggesting that increments in attentional demands due to L2 processing hinder the processes required for prospective remembering.

Spatiotemporal EEG Dynamics of Prospective Memory in Ageing and Mild Cognitive Impairment

Abstract Prospective memory (PM, the memory of future intentions) is one of the first complaints of those that develop dementia-related disease. Little is known about the neurophysiology of PM in ageing and those with mild cognitive impairment (MCI). By using a novel artificial neural network to investigate the spatial and temporal features of PM related brain activity, new insights can be uncovered. Young adults (n = 30), healthy older adults (n = 39) and older adults with MCI (n = 27) completed a working memory and two PM (perceptual, conceptual) tasks. Time-locked electroencephalographic potentials (ERPs) from 128-electrodes were analysed using a brain-inspired spiking neural network (SNN) architecture. Local and global connectivity from the SNNs was then evaluated. SNNs outperformed other machine learning methods in classification of brain activity between younger, older and older adults with MCI. SNNs trained using PM related brain activity had better classification accuracy than working memory related brain activity. In general, younger adults exhibited greater local cluster connectivity compared to both older adult groups. Older adults with MCI demonstrated decreased global connectivity in response to working memory and perceptual PM tasks but increased connectivity in the conceptual PM models relative to younger and healthy older adults. SNNs can provide a useful method for differentiating between those with and without MCI. Using brain activity related to PM in combination with SNNs may provide a sensitive biomarker for detecting cognitive decline. Cognitively demanding tasks may increase the amount connectivity in older adults with MCI as a means of compensation.

Do emotionally salient cues improve prospective memory performance in children and adolescents with autism?

BackgroundProspective memory (PM) describes the ability to initiate and perform a planned action after a delay. Previous studies suggest reduced PM in autism spectrum disorder (ASD); especially when tasks put high demands on executive control resources. Increasing cue salience by presenting emotional cues improves PM performance in non-autistic populations. AimsTo explore whether children with ASD, whose processing of emotionally connoted information might differ from that of typically developing children, may also benefit from this type of salience in PM tasks. Methods and proceduresTwenty-five children with and 25 children without ASD completed a 1-back ongoing task into which an event-based PM task was embedded. Emotional salience of PM cues was varied. Outcomes and resultsChildren with ASD performed as well as children without ASD on the PM task and equally benefited from emotionally salient cues. Specifically, negative cues increased PM performance compared to neutral cues in both groups Conclusions and implicationsThe findings are consistent with the multiprocess framework which postulates that salient PM cues increase performance by promoting automatic intention retrieval and reducing executive control demands. Children with ASD seem to show similar comprehension and accessibility to emotional cues as typically developing children.

The Padua PM task: a new high-quality video-based prospective memory assessment in younger and older adults

The Padua PM task: a new high-quality video-based prospective memory assessment in younger and older adults

Where Is My Mind…? The Link between Mind Wandering and Prospective Memory.

Mind wandering (MW) is a common feature of the human experience occurring when our attention shifts from the task at hand to inner thoughts. MW seems to be often future-oriented and could be used to help people to carry out their planned actions (Prospective Memory PM). Here, we tested the link between MW and the ability to perform PM intentions. We assessed MW and PM over 15 days using experience-sampling probes via mobile phone (226 participants) associated with a naturalistic PM task. We confirmed that MW occupies a significant proportion of our mental activity (40%). This time seems to be mainly used to project ourselves into the future (64%), whether to anticipate and imagine the long term (20%) or to plan daily obligations (44%). Intriguingly, only past-oriented thoughts (9%) predict the PM performance. We discuss the possible functional role played by MW in maintaining intentions in mind.

Neurophysiological markers of prospective memory and working memory in typical ageing and mild cognitive impairment

ObjectiveProspective memory (PM) —the memory of delayed intentions— is impacted by age-related cognitive decline. The current event-related potential study investigates neural mechanisms underpinning typical and atypical (Mild Cognitive Impairment, MCI) age-related decline in PM. MethodsYoung adults (YA, n = 30, age = 24.7, female n = 13), healthy older adults (OA, n = 39, age = 72.87, female n = 24) and older adults with MCI (n = 27, age = 77.54, female n = 12) performed two event-based PM tasks (perceptual, conceptual) superimposed on an ongoing working memory task. Electroencephalographic data was recorded from 128 electrodes. Groups were compared for P2 (higher order perceptual processing), N300/frontal positivity (cue detection), the parietal positivity (retrieval), reorienting negativity (RON; attention shifting). ResultsParticipants with MCI had poorer performance (ongoing working memory task, conceptual PM), lower P2 amplitudes, and delayed RON (particularly for perceptual PM) than YA and OA. MCI had lower parietal positivity relative to YA only. YA had earlier latencies for the parietal positivity than MCI and OA, and lower amplitudes for N300 (than OA) and frontal positivity (than OA and MCI). ConclusionsImpaired attention and working memory may underpin PM deficits in MCI. SignificanceThis is the first study to document the role of RON in PM and to investigate neurophysiological mechanisms underpinning PM in MCI.

Dexterous manual movement facilitates information processing in the primary somatosensory cortex: A magnetoencephalographic study.

The interaction between the somatosensory and motor systems is important for control of movement in humans. Cortical activity related to somatosensory response and sensory perception is modulated by the influence of movement executing mechanisms. This phenomenon has been observed as inhibition in the short‐latency components of somatosensory evoked potentials and magnetic fields (SEPs/SEFs). Although finger is the most dexterous among all the body parts, the sensorimotor integration underlying this dexterity has not yet been elucidated. The purpose of this study was to examine the sensorimotor integration mechanisms in the primary somatosensory cortex (SI) during simple and complicated finger movement. The participant performed tasks that involved picking up a wooden block (PM task) and picking up and turning the wooden block 180° (PTM task) using the right‐hand fingers. During these tasks, the SEFs following right median nerve stimulation were recorded using magnetoencephalography. The amplitude of the M20 and M30 components showed a significant reduction during both manual tasks compared to the stationary task, whereas the M38 component showed a significant enhancement in amplitude. Furthermore, the SEFs recorded during continuous rotation of the block (rotation task) revealed a characteristic pattern of SI activity that was first suppressed and then facilitated. Since this facilitation is noticeable during complicated movement of the fingers, this phenomenon is thought to underlie a neural mechanism related to finger dexterity.

The detrimental effects of mood on prospective memory are modulated by age.

Everyday fluctuations in mood can influence our ability to remember to carry out intentions (prospective memory [PM]). Theories of mood-cognition interaction make differing predictions about the effects of positive and negative mood states on cognition that may change in aging. To test these predictions, we looked at the effects of age and induced mood on different types of PM tasks. Results showed that on a task which required constant attentional monitoring (event-based PM) young adults' performance was impaired by negative mood, whereas older adults' performance was not influenced by mood. Further analyses indicated that the deleterious effects of negative mood states in young participants were related to decreased monitoring. In another task which required more intermittent monitoring (time-based PM), older adults' performance actually improved under positive mood, whereas young adults showed no effect of mood. Contrary to predictions, these age differences were not related to improved emotion regulation in old age. We conclude that young adults are more likely than older to show PM failures caused by negative mood. Future research priorities are outlined to better understand the motivational and task characteristics which influence this phenomenon. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Sustained and Transient Processes in Event-based Prospective Memory in Adolescence and Adulthood.

Prospective memory (PM) refers to the cognitive processes associated with remembering to perform an intended action after a delay. Varying the salience of PM cues while keeping the intended response constant, we investigated the extent to which participants relied on strategic monitoring, through sustained, top-down control, or on spontaneous retrieval via transient bottom-up processes. There is mixed evidence regarding developmental improvements in event-based PM performance after the age of 13 years. We compared PM performance and associated sustained and transient neural correlates in 28 typically developing adolescents (12-17 years old) and 19 adults (23-30 years old). Lower PM cue salience associated with slower ongoing task (OT) RTs, reflected by increased μ ex-Gaussian parameter, and sustained increases in frontoparietal activation during OT blocks, both thought to reflect greater proactive control supporting cue monitoring. Behavioral and neural correlates of PM trials were not specifically modulated by cue salience, revealing little difference in reactive control between conditions. The effect of cue salience was similar across age groups, suggesting that adolescents are able to adapt proactive control engagement to PM task demands. Exploratory analyses showed that younger, but not older, adolescents were less accurate and slower in PM trials relative to OT trials than adults and showed greater transient activation in PM trials in an occipito-temporal cluster. These results provide evidence of both mature and still maturing aspects of cognitive processes associated with implementation of an intention after a delay during early adolescence.

Event- and time-based prospective memory in hemodialysis patients

Objective The present study investigated whether hemodialysis (HD) patients exhibit future memory impairment (PM; the capability of remembering to perform expected future actions) and exploring relevant factors of PM task performance. Methods Sixty HD patients and 60 healthy controls matched by age are enrolled in the Mini-Mental State Examination (MMSE), Finger Span Test (DST), Oral Fluency Test (VFT), Ray Auditory Oral Learning Test (RAVLT), Received Stroop Color Word Interference Test (SCWT), and event-based PM (EBPM) and time-based PM (TBPM). Results There were no significant difference between the patients and controls in the DST-Forward digit span (9.00 ± 1.25 versus 8.97 ± 1.33, p = 0.96), the DST-Backward digit span (5.23 ± 1.98 versus. 4.60 ± 1.65, p = 0.11), the RAVLT of delayed recall (7.28 ± 2.36 versus 6.87 ± 3.33, p = 0.09) and the VFT for animals (16.70 ± 3.50 versus 17.68 ± 5.45, p = 0.56). By comparison, patients had a much worse performance than controls on the MMSE (29.10 ± 0.84 versus 28.33 ± 0.77, p < 0.001), the RAVLT of total recall (44.47 ± 5.82 versus 40.03 ± 10.46, p < 0.001) and delayed recognition (6.93 ± 1.49 versus 5.4 ± 1.33, p < 0.001), the SCWT reaction time in reading (6.47 ± 1.05 versus 7.47 ± 1.86, p < 0.001), color naming (9.07 ± 1.29 versus 11.43 ± 2.34, p < 0.001), interference (8.78 ± 1.92 versus 10.22 ± 2.91, p < 0.001) and inhibition/switching (14.53 ± 2.90 versus 19.85 ± 4.69, p < 0.001), the VFT for fruit (17.47 ± 3.18 versus 15.92 ± 4.56, p < 0.001), the EBPM task (7.85 ± 0.40 versus 7.08 ± 1.43, p = 0.01), and the TBPM task (3.30 ± 1.31 versus 2.26 ± 1.82, p < 0.001). Conclusions Our results suggest that EBPM and TBPM are impaired in HD patients and that PM may be applied to help evaluate cognitive dysfunction in HD patients.

Theta and alpha oscillations as signatures of internal and external attention to delayed intentions: A magnetoencephalography (MEG) study

BackgroundRemembering to execute delayed intentions (i.e., prospective memory, PM) entails the allocation of internal and external attention. These processes are crucial for rehearsing PM intentions in memory and for monitoring the presence of the PM cue in the environment, respectively. AimThe study took advantage of the excellent spatial and temporal resolution of magnetoencephalography (MEG) to delineate the neural mechanisms of the memory and monitoring processes underlying PM. MethodThe spatio-temporal dynamic of theta and alpha oscillations were explored in 21 participants in two PM tasks compared to a baseline condition (i.e., a lexical decision task with no PM instruction). The PM tasks varied for the load of internally-directed attention (Retrospective-load task) vs externally-directed attention (Monitoring-load task). ResultsIncrease in theta activity was observed in the Retrospective-load task, and was particularly expressed in the regions of the Default Mode Network, such as in medial temporal regions, precuneus, posterior cingulate cortex and medial prefrontal cortex. Alpha decrease was the most relevant feature of the Monitoring-load task, and it was expressed over bilateral occipital, occipito-parietal and fronto-temporal regions, as well as over left dorsal fronto-parietal regions. ConclusionsTheta and alpha oscillations are strictly associated with the direction of attention during the PM tasks. In particular, theta increase is linked to internal attention necessary for maintaining the intention active in working memory, whereas alpha decrease supports the external attention for detecting the PM cue in the environment.

The influence of ongoing task absorption on preschoolers’ prospective memory with peripheral cues

ABSTRACTProspective memory (PM) represents the ability to perform a planned action after a certain delay. Substantial increases of PM have been shown across the ages of preschool children. However, previous studies have mostly focused on PM tasks, in which the PM cue was presented centrally (i.e. inside the centre of attention). The current study examined developmental differences between 3-, 4-, and 5-year old preschoolers using PM tasks, in which the PM cue was presented peripherally and investigated the influence of ongoing task absorption on children’s performance on such tasks. Results showed that PM performance increased over preschool age and that it was affected by ongoing task absorption, with significantly better PM performance on a low- versus a high-absorbing ongoing task. Importantly, age differences were only present in the low- but not in the high-absorbing condition, showing that preschoolers’ PM improves when less cognitive resources are absorbed by the ongoing task.

An Efficient Maintenance Plan Using Proposed Framework of RCM Made Simple Approach

Reliability Centered Maintenance (RCM) is an effective maintenance strategy and a powerful tool for industrial system enhancement. In this paper, a Framework of RCM is proposed. RCM Made Simple approach is adopted instead of classical RCM to overcome its complexity. A comprehensive analysis is carried out using the proposed Framework which generates a maintenance plane for industrial systems. This analysis is applied on a real case study. The results revealed which component could be critical, potentially critical, commitment, or run to failure. Moreover, it presented the function of each component, failure modes, failure effects and its consequence on the system, failure causes, PM task required, PM frequency for each task, and how to prevent each failure cause. The Framework that proposed in this paper could be adopted as a simple approach to enhance the Reliability, Availability, and Maintainability (RAM) of the industrial systems.

Do importance instructions improve time-based prospective remembering in autism spectrum conditions?

This study explored the impact of motivation on the memory for delayed intentions (so-called, prospective memory, PM) in autistic individuals. Specifically, we were interested in the effects of personal (i.e., receiving a reward) as compared to social motivation (i.e., performing a favour for someone). Given the well-established theory of mind deficits in autism, we expected autistic individuals to benefit more strongly from personal than social importance manipulations, whereas the opposite pattern was predicted for controls. Sixty-one adolescents with autism and 61 typically developing adolescents participated, with each group distributed equally to one of the three motivation conditions of standard, social and personal reward. Participants worked on a 2-back picture-based ongoing task in which a time-based PM task was embedded. A mixed 2 (Group) x 3 (Motivation condition) analysis of covariance with age, verbal and non-verbal abilities as covariates and correct PM responses as dependent variable indicated solely a main effect of group, with controls outperforming the autism group. In contrast to our expectations, there was no main effect of condition, no significant interaction, and none of the covariates had any significant impact. However, further planned analyses revealed that controls only outperformed autistic individuals in the personal reward condition. Controls performed significantly best when a personal reward was promised, whereas there were no significant differences between the motivation conditions for autistic individuals. Findings are discussed in terms of underlying processes.

Smartwatch aids time-based prospective memory in Korsakoff syndrome: a case study

ABSTRACTProspective memory (PM) is the ability to remember to carry out an intention in the future. PM is particularly impaired in Korsakoff syndrome (KS). We investigated the benefit of a smartwatch and smartphone compared to no aid in supporting time accuracy and PM task performance in KS. Time accuracy was improved with a smartwatch compared to the other conditions. Furthermore, the smartwatch and phone conditions were more effective than no aid in assisting memory for task content. Together these results suggest that using an external memory aid is beneficial for successful PM in KS.

Successful and Unsuccessful Collaborative Processes in Strangers and Couples Performing Prospective Memory Tasks

ABSTRACTProspective memory (PM) performance suffers when individuals collaborate, consistent with findings of “collaborative inhibition” in episodic recall. However, prior research indicates strong individual differences, such that some collaborative groups are more effective than others. To identify successful and unsuccessful collaborative processes, we examined dialogue of 20 stranger dyads and intimate couples who worked together to complete an interactive PM task, “Virtual Week.” Ten were the highest-performing dyads, and 10 were the lowest-performing dyads. We coded each transcript of their dialogue during the task for cognitive processes, social processes, and generalized conversational skills. A Principal Components Analysis indicated that processes clustered into four factors, with some processes (e.g., task division, monitoring, sociability) being beneficial for both couples and stranger dyads, and others (e.g., demands, critical dialogue) being detrimental for couples only. We conclude that the best strategies to enhance collaborative PM might depend on who is collaborating.