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1.
Autism Res ; 17(6): 1175-1186, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38682234

ABSTRACT

Subjective wellbeing (SWB) represents an individual's perception of wellness that is supported by homeostatic mechanisms. These mechanisms are proposed to be maintained by low negative affect and high positive affect, although less is known about these mechanisms and SWB in autism. The current cross-sectional study aimed to compare patterns of positive affect, negative affect (Positive Affect and Negative Affect Scale), and SWB (Personal Wellbeing Index-School Children) between autistic (n = 53) and non-autistic (n = 49) individuals aged 10-22 years (Mage = 13.97, SD = 3.13). Between-group t-tests revealed that compared with same-age peers, autistic participants scored lower SWB overall (p < 0.001). In both groups average SWB scores fell into the higher range, however, autistic participants were three-times more likely to fall below this range when compared to non-autistic participants. Negative affect had a higher intercept in the autistic sample, but no difference in slopes were observed. A hierarchical multiple regression revealed that diagnosis, positive affect, and negative affect significantly predicted SWB in our sample. Between-group t-tests found no significant difference in positive affect or negative affect across age between the autistic and non-autistic samples. In autistic participants, positive affect increased across age as SWB decreased, whilst negative affect remained stable, a pattern inconsistent with homeostatic SWB. The current study is overall consistent with the homeostatic explanation for SWB within autism; however, we identified potential differences between autistic and non-autistic participants in the contribution of positive affect and negative affect to homeostatic protect mood across development.


Subject(s)
Autistic Disorder , Humans , Adolescent , Cross-Sectional Studies , Male , Female , Young Adult , Child , Autistic Disorder/psychology , Affect/physiology , Personal Satisfaction , Adult
2.
Autism Res ; 17(5): 947-954, 2024 May.
Article in English | MEDLINE | ID: mdl-38634518

ABSTRACT

It is crucial to arrive at a comprehensive understanding of the types of daily activities autistic adults typically engage in. However, previous research has almost exclusively focused on vocational or education activities. Further, it remains unclear how and whether specific daily activities participation rates change proportionally over time, vary by gender, or compare to nationally representative data. Utilizing eight annual data waves from the Netherlands Autism Register (NAR) this study aims to bridge this gap. Participants were 2449 autistic adults who indicated their participation in 18 daily activities. Results suggest that autistic adults engaged most frequently in vocational activities (e.g., paid employment, study) and participation rates were stable over time. Participation rates in non-vocational activities (e.g., hobbies, homemaking) fluctuated proportionally over time, with reports of no structured daytime activities reducing over time. Labor force participation amongst NAR participants was significantly lower than Dutch population data for the same time periods. Unemployment rates fluctuated, and were significantly higher than population data, but not for all time points. Females compared to males were overrepresented in unpaid daily activities (e.g., study, volunteer, housemaker) and work incapacitation, and underrepresented in paid employment. Employment differences in gender corresponded to national data. These findings characterize more clearly the daily activities of autistic adults, and highlights areas where support may have greater impact (e.g., females in employment).


Subject(s)
Activities of Daily Living , Autistic Disorder , Employment , Humans , Male , Female , Adult , Cross-Sectional Studies , Employment/statistics & numerical data , Netherlands , Young Adult , Middle Aged , Sex Factors
3.
Autism ; : 13623613231225798, 2024 Jan 19.
Article in English | MEDLINE | ID: mdl-38243409

ABSTRACT

LAY ABSTRACT: Autistic adults experience difficulties finding and keeping employment. However, research investigating reasons that might explain this difficulty produce mixed results. We gave a survey to 2449 autistic adults and used a statistic method to group them based on their employment status over 8 years. We identified four employment groups that best captured the experiences of autistic adults; this included a group that experienced stable unemployment, a group that experienced stable employment, a group that had high employment that reduced over time, and a group whose employment increased over the 8 years. Further analysis showed that those with fewer autistic traits, younger age, male gender, higher education, later diagnosis age and no co-occurring conditions were more likely to have stable employment. People whose employment changed over time were more likely to have a higher level of education than the stable unemployment group, and those in the increasing employment group were younger age and had no co-occurring conditions. These findings help us better understand that not all autistic adults' experiences of employment are the same, which helps focus where employment programmes and support may be most needed, for example, people who identify as women or have a co-occurring condition.

4.
Autism ; 28(3): 770-779, 2024 Mar.
Article in English | MEDLINE | ID: mdl-37530121

ABSTRACT

LAY ABSTRACT: In this article, we propose recommendations on what we can do to promote that autistic people can enjoy their sexuality and gender identity, because that contributes to overall well-being.First, we briefly summarize the existing research on sexuality and gender diversity in autistic individuals.Next, we propose recommendations for how to promote sexual and gender diversity-related health and well-being. Based on what is known about sexuality, gender diversity, and relationships in autistic adolescents and adults, we convened an international group of autistic and non-autistic researchers, advocates, parents, and professionals to develop recommendations to promote sexual and gender health in autistic people.The resulting recommendations were checked through an online survey distributed to autistic people across the world. The online participants endorsed the importance of eight final recommendations related to:1. Providing education and information on sexuality, relationships, and gender diversity to autistic individuals and their families;2. Improving expertise in and accessibility to healthcare for sexuality, relationships, and gender-related questions, with specific attention to prevention of and support after sexual victimization; and3. Meaningfully including the autism community in future research that addresses well-being relating to sexuality, relationships, and gender diversity.These community-driven recommendations aim to promote sexual health and well-being in autistic individuals internationally.


Subject(s)
Autism Spectrum Disorder , Autistic Disorder , Adult , Humans , Female , Adolescent , Male , Gender Identity , Sexuality , Policy
5.
Proc Natl Acad Sci U S A ; 120(48): e2307991120, 2023 Nov 28.
Article in English | MEDLINE | ID: mdl-37983510

ABSTRACT

Working memory involves the short-term maintenance of information and is critical in many tasks. The neural circuit dynamics underlying working memory remain poorly understood, with different aspects of prefrontal cortical (PFC) responses explained by different putative mechanisms. By mathematical analysis, numerical simulations, and using recordings from monkey PFC, we investigate a critical but hitherto ignored aspect of working memory dynamics: information loading. We find that, contrary to common assumptions, optimal loading of information into working memory involves inputs that are largely orthogonal, rather than similar, to the late delay activities observed during memory maintenance, naturally leading to the widely observed phenomenon of dynamic coding in PFC. Using a theoretically principled metric, we show that PFC exhibits the hallmarks of optimal information loading. We also find that optimal information loading emerges as a general dynamical strategy in task-optimized recurrent neural networks. Our theory unifies previous, seemingly conflicting theories of memory maintenance based on attractor or purely sequential dynamics and reveals a normative principle underlying dynamic coding.


Subject(s)
Memory, Short-Term , Neurons , Memory, Short-Term/physiology , Neurons/physiology , Prefrontal Cortex/physiology , Neural Networks, Computer
6.
PLoS Comput Biol ; 19(10): e1011555, 2023 Oct.
Article in English | MEDLINE | ID: mdl-37851670

ABSTRACT

When multiple items are held in short-term memory, cues that retrospectively prioritise one item over another (retro-cues) can facilitate subsequent recall. However, the neural and computational underpinnings of this effect are poorly understood. One recent study recorded neural signals in the macaque lateral prefrontal cortex (LPFC) during a retro-cueing task, contrasting delay-period activity before (pre-cue) and after (post-cue) retrocue onset. They reported that in the pre-cue delay, the individual stimuli were maintained in independent subspaces of neural population activity, whereas in the post-cue delay, the prioritised items were rotated into a common subspace, potentially allowing a common readout mechanism. To understand how such representational transitions can be learnt through error minimisation, we trained recurrent neural networks (RNNs) with supervision to perform an equivalent cued-recall task. RNNs were presented with two inputs denoting conjunctive colour-location stimuli, followed by a pre-cue memory delay, a location retrocue, and a post-cue delay. We found that the orthogonal-to-parallel geometry transformation observed in the macaque LPFC emerged naturally in RNNs trained to perform the task. Interestingly, the parallel geometry only developed when the cued information was required to be maintained in short-term memory for several cycles before readout, suggesting that it might confer robustness during maintenance. We extend these findings by analysing the learning dynamics and connectivity patterns of the RNNs, as well as the behaviour of models trained with probabilistic cues, allowing us to make predictions for future studies. Overall, our findings are consistent with recent theoretical accounts which propose that retrocues transform the prioritised memory items into a prospective, action-oriented format.


Subject(s)
Cues , Memory, Short-Term , Animals , Prospective Studies , Retrospective Studies , Prefrontal Cortex , Macaca
8.
J Atten Disord ; 27(10): 1065-1074, 2023 08.
Article in English | MEDLINE | ID: mdl-37122232

ABSTRACT

OBJECTIVE: To investigate the longitudinal associations between COVID-19 induced stress (related to COVID-19 restrictions/changes), attention-deficit/hyperactivity disorder (ADHD) symptoms, oppositional symptoms, and mental health outcomes (negative affect, anxiety, depression, and irritability) in children with ADHD during the COVID-19 pandemic. METHOD: Parents of 140 Australian children with ADHD (aged 5-17 years) completed an online survey in May 2020 during stay-at-home restrictions and 12-months later. RESULTS: Baseline COVID-19 stress was associated with increased total ADHD symptom severity (ß = .21, p = .007) and hyperactivity/impulsivity symptoms (ß = .23, p = .002) at 12-months, after accounting for covariates (i.e., child age, gender, ADHD medication, socio-economic status, and baseline symptoms). Despite some indication of associations between baseline COVID-19 stress and 12-month oppositional symptoms and negative affect, these were attenuated when adjusting for baseline symptoms. CONCLUSIONS: The study provides initial evidence of the medium-term impacts of pandemic-related stress for children with ADHD.


Subject(s)
Attention Deficit Disorder with Hyperactivity , COVID-19 , Humans , Child , Attention Deficit Disorder with Hyperactivity/psychology , Mental Health , Pandemics , Australia/epidemiology
9.
J Neurosci ; 43(15): 2730-2740, 2023 04 12.
Article in English | MEDLINE | ID: mdl-36868858

ABSTRACT

Behavioral reports of sensory information are biased by stimulus history. The nature and direction of such serial-dependence biases can differ between experimental settings; both attractive and repulsive biases toward previous stimuli have been observed. How and when these biases arise in the human brain remains largely unexplored. They could occur either via a change in sensory processing itself and/or during postperceptual processes such as maintenance or decision-making. To address this, we tested 20 participants (11 female) and analyzed behavioral and magnetoencephalographic (MEG) data from a working-memory task in which participants were sequentially presented with two randomly oriented gratings, one of which was cued for recall at the end of the trial. Behavioral responses showed evidence for two distinct biases: (1) a within-trial repulsive bias away from the previously encoded orientation on the same trial, and (2) a between-trial attractive bias toward the task-relevant orientation on the previous trial. Multivariate classification of stimulus orientation revealed that neural representations during stimulus encoding were biased away from the previous grating orientation, regardless of whether we considered the within-trial or between-trial prior orientation, despite opposite effects on behavior. These results suggest that repulsive biases occur at the level of sensory processing and can be overridden at postperceptual stages to result in attractive biases in behavior.SIGNIFICANCE STATEMENT Recent experience biases behavioral reports of sensory information, possibly capitalizing on the temporal regularity in our environment. It is still unclear at what stage of stimulus processing such serial biases arise. Here, we recorded behavior and neurophysiological [magnetoencephalographic (MEG)] data to test whether neural activity patterns during early sensory processing show the same biases seen in participants' reports. In a working-memory task that produced multiple biases in behavior, responses were biased toward previous targets, but away from more recent stimuli. Neural activity patterns were uniformly biased away from all previously relevant items. Our results contradict proposals that all serial biases arise at an early sensory processing stage. Instead, neural activity exhibited mostly adaptation-like responses to recent stimuli.


Subject(s)
Memory, Short-Term , Visual Perception , Humans , Female , Visual Perception/physiology , Memory, Short-Term/physiology , Cognition , Brain , Cues
10.
Autism ; : 13623613231160244, 2023 Mar 16.
Article in English | MEDLINE | ID: mdl-36924337

ABSTRACT

LAY ABSTRACT: Previous research has found that autistic people report lower satisfaction in their romantic relationships compared to non-autistic people. However, the majority of this research has focused on autistic traits as barriers to relationship satisfaction, while overlooking the role of their partners in these relationships. Our study explored a range of factors in both autistic people and non-autistic partners of autistic people and how they may be linked to long-term relationship satisfaction. These factors included social and communication skills, personality traits, social loneliness, partner responsiveness, and sexual satisfaction. We found that partner responsiveness was a strong predictor of relationship satisfaction for both autistic and non-autistic partners, suggesting that rather than focusing intervention solely on the autistic person, the role of their partner should also be considered. Service providers who work with couples involving an autistic person to enhance their relationship satisfaction could focus on assisting their clients to identify each other's needs and how best to meet them.

11.
Psychol Health Med ; 28(9): 2672-2684, 2023.
Article in English | MEDLINE | ID: mdl-36842996

ABSTRACT

Our aim was to explore the association between COVID-19 pandemic-related product shortages and symptoms of stress, anxiety, and depression in Australian families, concurrently and longitudinally, while controlling for demographic, health, and psychological characteristics. This prospective study used two waves of data (baseline, Time 0 = April 2020; Time 1 = May 2020) from a longitudinal cohort study of Australian parents of a child aged 0-18 years. Parents were surveyed at baseline about whether they had experienced product shortages related to COVID-19. DASS21 was used to measure symptoms of depression, anxiety, and stress at both waves. The sample included 2,110 participants (N = 1,701, 80.6% mothers). About 68.6% of the respondents reported being impacted by one or more shortages. Product shortages correlated significantly with higher combined and individual scores for anxiety, depression, and stress (r = 0.007 to 0.18, all p < 0.001) at baseline. At Time 1, parental emotion regulation explained 4.0% of the variance (p < .001). Our findings suggest a role for improving parental emotion regulation in coping with stressors, such as shortages and lockdowns.


Subject(s)
COVID-19 , Mental Health , Child , Humans , Prospective Studies , Longitudinal Studies , Pandemics , COVID-19/epidemiology , Australia/epidemiology , Communicable Disease Control , Anxiety/epidemiology , Depression/epidemiology
12.
Autism ; 27(7): 1968-1982, 2023 10.
Article in English | MEDLINE | ID: mdl-36688323

ABSTRACT

LAY ABSTRACT: It is important that autistic children be diagnosed as early as possible so their needs can be met and their families can gain important insights into their behavior and interact with them appropriately. However, very few autism screening instruments are appropriate for children who have outgrown early childhood. The Autism Screen for Kids and Youth (ASKY) presents parents of children aged 4-18 years with 30 items that relate to autistic behaviors as defined by the current clinical diagnostic criteria for autism spectrum disorder (DSM-5 ASD). We evaluated the Hebrew instrument's performance on 167 autistic and non-autistic children and adolescents. We found that the ASKY algorithm correctly identified 92% of the autistic individuals as "probable ASD" and correctly identified 72% of the non-autistic individuals as "probable non-ASD," with these classifications showing excellent stability over time. Using total questionnaire score instead of the algorithm improved the ASKY's ability to correctly identify autistic individuals as "probable ASD" and non-autistic individuals as "probable non-ASD" to 93% and 78%, respectively. Overall, the ASKY is a promising instrument for ASD screening of older children.


Subject(s)
Autism Spectrum Disorder , Autistic Disorder , Child , Humans , Child, Preschool , Adolescent , Autistic Disorder/diagnosis , Autism Spectrum Disorder/diagnosis , Reproducibility of Results , Parents , Surveys and Questionnaires
13.
Autism ; 27(4): 1115-1131, 2023 05.
Article in English | MEDLINE | ID: mdl-36237153

ABSTRACT

LAY ABSTRACT: Autistic people may be at higher risk of suicidal behavior than people in the general population. Suicidal behavior may include thinking about suicide or attempting to end one's own life by suicide. It is important to identify autistic people who may be thinking about suicide. People who are at risk of suicidal behavior can be identified by asking questions about whether they have been thinking about suicide. A specially designed questionnaire, or screening instrument, can help someone ask the best questions to find out if someone has been thinking about suicide. This information can help to identify supports to be put in place to prevent suicidal behavior, such as a suicide attempt. However, autistic people may interpret questions differently than non-autistic people. It is important to use screening tools that have been designed with, and for autistic people. In this study, we examined the Suicidal Ideation Attributes Scale (SIDAS). The SIDAS is an existing tool that was developed to screen for suicidal thinking in the general population. We modified SIDAS for use with autistic adults. We involved autistic people in the process of modifying SIDAS. We called the modified instrument the SIDAS-M. The results of our study showed SIDAS-M may be useful for screening for suicidal thinking in autistic adults who do not have an intellectual disability.


Subject(s)
Autism Spectrum Disorder , Autistic Disorder , Adult , Humans , Suicidal Ideation , Autism Spectrum Disorder/diagnosis , Suicide, Attempted/prevention & control , Autistic Disorder/diagnosis , Autistic Disorder/epidemiology , Surveys and Questionnaires , Risk Factors
14.
Front Psychiatry ; 14: 1294254, 2023.
Article in English | MEDLINE | ID: mdl-38361829

ABSTRACT

Introduction: Autism Spectrum Disorder is a complex neurodevelopmental syndrome that profoundly affects social interactions, communication, and sensory perception. The research traced the evolution of autism research from 2011-2022, specifically focusing on the screening and diagnosis of children and students. Methods: Through an analysis of 12,262 publications using the PRISMA framework, bibliographic coupling, science mapping, and citation analysis, this study illuminates the growth trajectory of ASD research and significant disparities in diagnosis and services. Results: The study indicates an increasing trend in autism research, with a strong representation of female authorship. Open Access journals show a higher average citation impact compared to their closed counterparts. A keyword co-occurrence analysis revealed four central research themes: Child Development and Support Systems, Early Identification and Intervention, Prevalence and Etiology, and Mental Health. The pandemic's onset has prioritized research areas like mental health, telehealth, and service accessibility. Discussion: Recommendations on a global level stress the importance of developing timely biological markers for ASD, amplifying Disability Inclusion research, and personalizing mental health services to bridge these critical service gaps. These strategies, underpinned by interdisciplinary collaboration and telehealth innovation, particularly in low-resource settings, can offer a roadmap for inclusive, context-sensitive interventions at local levels that directly support SDG3's aim for health and well-being for all.

15.
Proc Natl Acad Sci U S A ; 119(40): e2200400119, 2022 10 04.
Article in English | MEDLINE | ID: mdl-36161948

ABSTRACT

The ability of prefrontal cortex to quickly encode novel associations is crucial for adaptive behavior and central to working memory. Fast Hebbian changes in synaptic strength permit forming new associations, but neuronal signatures of this have been elusive. We devised a trialwise index of pattern similarity to look for rapid changes in population codes. Based on a computational model of working memory, we hypothesized that synaptic strength-and consequently, the tuning of neurons-could change if features of a subsequent stimulus need to be "reassociated," i.e., if bindings between features need to be broken to encode the new item. As a result, identical stimuli might elicit different neural responses. As predicted, neural response similarity dropped following rebinding, but only in prefrontal cortex. The history-dependent changes were expressed on top of traditional, fixed selectivity and were not explainable by carryover of previous firing into the current trial or by neural adaptation.


Subject(s)
Memory, Short-Term , Models, Neurological , Prefrontal Cortex , Synapses , Memory, Short-Term/physiology , Neurons/physiology , Prefrontal Cortex/physiology , Synapses/physiology
16.
Res Dev Disabil ; 129: 104310, 2022 Oct.
Article in English | MEDLINE | ID: mdl-35926258

ABSTRACT

BACKGROUND: Navigating workplace social interactions can be stressful for autistic people and be experienced differently by gender. A better understanding of the autistic experience of these difficulties is needed to inform effective policy, practice, and individualized support. METHOD: Fifty-five autistic individuals (n women=32; n men=22) participated in either an online survey or focus group. Data were analyzed using inductive thematic analysis. RESULTS: The data suggests that the social and interaction expectations placed upon autistic individuals differ by gender and can contribute to occupational stress. CONCLUSIONS: The data provides a basis for further investigation considering Conservation of Resources Theory and its practical application to inform reasonable adjustments in the workplace for autistic people. WHAT THIS PAPER ADDS: The gendered workplace experiences of autistic people is an emerging area of research. However, how workplace social interactions are experienced by each gender remains under-researched. An understanding of this could help decrease occupational stress, inform reasonable adjustments, and increase labor market participation in this population. This paper adds to the existing literature in showing that workplace social interactions for autistic people are experienced differently by gender. As such, the implications in the experience of occupational stress may also differ. Therefore, the importance of having reasonable adjustments in the workplace that account for gender is highlighted.


Subject(s)
Autism Spectrum Disorder , Autistic Disorder , Occupational Stress , Female , Focus Groups , Humans , Male , Social Interaction , Workplace
17.
J Cogn Neurosci ; 34(9): 1681-1701, 2022 08 01.
Article in English | MEDLINE | ID: mdl-35704549

ABSTRACT

Attention can be allocated in working memory (WM) to select and privilege relevant content. It is unclear whether attention selects individual features or whole objects in WM. Here, we used behavioral measures, eye-tracking, and EEG to test the hypothesis that attention spreads between an object's features in WM. Twenty-six participants completed a WM task that asked them to recall the angle of one of two oriented, colored bars after a delay while EEG and eye-tracking data were collected. During the delay, an orthogonal "incidental task" cued the color of one item for a match/mismatch judgment. On congruent trials (50%), the cued item was probed for subsequent orientation recall; on incongruent trials (50%), the other memory item was probed. As predicted, selecting the color of an object in WM brought other features of the cued object into an attended state as revealed by EEG decoding, oscillatory α-power, gaze bias, and improved orientation recall performance. Together, the results show that attentional selection spreads between an object's features in WM, consistent with object-based attentional selection. Analyses of neural processing at recall revealed that the selected object was automatically compared with the probe, whether it was the target for recall or not. This provides a potential mechanism for the observed benefits of nonpredictive cueing in WM, where a selected item is prioritized for subsequent decision-making.


Subject(s)
Attention , Memory, Short-Term , Cues , Humans , Mental Recall
18.
J Integr Neurosci ; 21(2): 57, 2022 Mar 22.
Article in English | MEDLINE | ID: mdl-35364645

ABSTRACT

Frontal lobe volume has been extensively researched in individuals with Autism spectrum disorder (ASD), though findings are yet to be summarised to explain the developmental trends of frontal lobe volume. The aim of the present study is to consolidate all existing frontal lobe volume and age data of autistic individuals below 30 years of age, and compare this data to non-autistic (N-ASD) controls. Following a systematic review, frontal lobe volume data were obtained from seven papers. Raw data, or the means and standard deviations of frontal lobe volume, and age, were obtained from the studies giving 372 autistic and 190 N-ASD participants. Data were plotted and analysed. Findings revealed that regression lines of fit for ASD (R2L⁢i⁢n⁢e⁢a⁢r = 0.33; R2Q⁢u⁢a⁢d⁢r⁢a⁢t⁢i⁢c = 0.52) and N-ASD (R2L⁢i⁢n⁢e⁢a⁢r = 0.14; R2Q⁢u⁢a⁢d⁢r⁢a⁢t⁢i⁢c = 0.39) were significantly different by diagnosis (linear p = 0.002, quadratic p = 0.02) with quadratic models providing significantly better fit within ASD (p < 0.001) and N-ASD (p < 0.001). Additional analyses revealed that frontal lobe volume was greater in autistic individuals than N-ASD between two and four years (F(1,31) = 12.965, p < 0.005, η2 = 0.291). In the present study, there were distinct developmental trends for frontal lobe volume between ASD and N-ASD.


Subject(s)
Autism Spectrum Disorder , Autistic Disorder , Autism Spectrum Disorder/diagnostic imaging , Frontal Lobe/diagnostic imaging , Humans
19.
J Neurosci ; 42(9): 1804-1819, 2022 03 02.
Article in English | MEDLINE | ID: mdl-35042770

ABSTRACT

Value-based decision-making is often studied in a static context, where participants decide which option to select from those currently available. However, everyday life often involves an additional dimension: deciding when to select to maximize reward. Recent evidence suggests that agents track the latent reward of an option, updating changes in their latent reward estimate, to achieve appropriate selection timing (latent reward tracking). However, this strategy can be difficult to distinguish from one in which the optimal selection time is estimated in advance, allowing an agent to wait a predetermined amount of time before selecting, without needing to monitor an option's latent reward (distance-to-goal tracking). Here, we show that these strategies can in principle be dissociated. Human brain activity was recorded using electroencephalography (EEG), while female and male participants performed a novel decision task. Participants were shown an option and decided when to select it, as its latent reward changed from trial-to-trial. While the latent reward was uncued, it could be estimated using cued information about the option's starting value and value growth rate. We then used representational similarity analysis (RSA) to assess whether EEG signals more closely resembled latent reward tracking or distance-to-goal tracking. This approach successfully dissociated the strategies in this task. Starting value and growth rate were translated into a distance-to-goal signal, far in advance of selecting the option. Latent reward could not be independently decoded. These results demonstrate the feasibility of using high temporal resolution neural recordings to identify internally computed decision variables in the human brain.SIGNIFICANCE STATEMENT Reward-seeking behavior involves acting at the right time. However, the external world does not always tell us when an action is most rewarding, necessitating internal representations that guide action timing. Specifying this internal neural representation is challenging because it might stem from a variety of strategies, many of which make similar predictions about brain activity. This study used a novel approach to test whether alternative strategies could be dissociated in principle. Using representational similarity analysis (RSA), we were able to distinguish between candidate internal representations for selection timing. This shows how pattern analysis methods can be used to measure latent decision information in noninvasive neural data.


Subject(s)
Cues , Reward , Brain , Choice Behavior , Decision Making , Electroencephalography , Female , Humans , Male , Prospective Studies
20.
Aust N Z J Psychiatry ; 56(11): 1503-1514, 2022 11.
Article in English | MEDLINE | ID: mdl-34963330

ABSTRACT

BACKGROUND: Nascent evidence indicates that the mental health of parents and children has markedly declined during the COVID-19 pandemic. Considering disruptions to traditional face-to-face mental health services resultant from stay-at-home orders, the potential value of digital mental health interventions has become extremely apparent. Despite this, uptake of digital interventions remains poor, indicating that a better understanding is needed of factors that determine a willingness to use digital platforms. METHOD: The present multi-wave, longitudinal study of 2365 Australian parents explored between-person and within-person predictors of intentions to use digital interventions during the pandemic. RESULTS: More than one-third of parents reported likely use of a self-guided and therapist-guided digital intervention, with the most endorsed reason for use being to support their child's mental health. Between-person baseline predictors of higher intention ratings were parent's prior mental illness, not living with a partner and recent environmental stressors. Within-person predictors of higher intention ratings were endorsement of mindful parenting strategies, child access to the Internet, better perceived management of child's education, lower social support and financial hardship. CONCLUSION: Findings demonstrate that willingness to engage in digital interventions fluctuates in response to changing circumstances. Identifying novel ways to increase acceptance and uptake of digital interventions based on modifiable predictors established here is needed to realize the full potential of these modes of care in times of need.


Subject(s)
COVID-19 , Mental Health , Child , Humans , Pandemics , Australia , Longitudinal Studies , Parents/psychology , Parenting/psychology
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