normative models
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Longitudinal neuroimaging studies offer valuable insight into brain development, ageing, and disease progression over time. However, prevailing analytical approaches rooted in our understanding of population variation are primarily tailored for cross-sectional studies. To fully leverage the potential of longitudinal neuroimaging, we need methodologies that account for the complex interplay between population variation and individual dynamics. We extend the normative modelling framework, which evaluates an individual's position relative to population standards, to assess an individual's longitudinal change compared to the population's standard dynamics. Using normative models pre-trained on over 58,000 individuals, we introduce a quantitative metric termed 'z-diff' score, which quantifies a temporal change in individuals compared to a population standard. This approach offers advantages in flexibility in dataset size and ease of implementation. We applied this framework to a longitudinal dataset of 98 patients with early-stage schizophrenia who underwent MRI examinations shortly after diagnosis and 1 year later. Compared to cross-sectional analyses, showing global thinning of grey matter at the first visit, our method revealed a significant normalisation of grey matter thickness in the frontal lobe over time-an effect undetected by traditional longitudinal methods. Overall, our framework presents a flexible and effective methodology for analysing longitudinal neuroimaging data, providing insights into the progression of a disease that would otherwise be missed when using more traditional approaches.
- Klíčová slova
- MRI, human, neuroimaging, neuroscience, normative modelling, psychosis, schizophrenia,
- MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- longitudinální studie MeSH
- magnetická rezonanční tomografie MeSH
- mozek * diagnostické zobrazování MeSH
- neurozobrazování * metody MeSH
- průřezové studie MeSH
- schizofrenie * diagnostické zobrazování patologie MeSH
- šedá hmota diagnostické zobrazování patologie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Cyberbullying often takes place with the virtual presence or knowledge of bystanders. While we have some evidence about the determinants of bystanders' responses to offline bullying, we lack empirical studies concerning the variables that influence bystanders' responses to cyberbullying. The current study examines bystanders' responses to offline bullying and cyberbullying incidents. Two types of responses were captured: support toward the victims and the reinforcement of bullies' actions. Using data from 321 German adolescents (ages 12-18; M = 14.99; 44% girls), the association between bystanders' responses and normative beliefs about verbal aggression and cyberaggression, and affective and cognitive empathy, were tested in a path model. Both types of normative beliefs positively predicted the reinforcement of bullies, and normative belief about verbal aggression also predicted support for the victims of offline bullying. Both types of empathy predicted support in offline bullying, but only affective empathy predicted support in cyberbullying. There was no link between affective or cognitive empathy to the reinforcement of bullies. Moreover, bystanders' tendencies to respond supportively to the victim or to reinforce the bully were rather consistent in both cyber- and offline bullying, but there was no link between support and reinforcement. The findings are discussed with regard to implications for prevention and intervention efforts.
- Klíčová slova
- Offline bullying, bystanders, cyberbullying, empathy, normative beliefs about aggression,
- MeSH
- afekt MeSH
- agrese psychologie MeSH
- chování dětí psychologie MeSH
- chování mladistvých psychologie MeSH
- dítě MeSH
- empatie * MeSH
- internet MeSH
- lidé MeSH
- mladiství MeSH
- oběti zločinu psychologie MeSH
- průzkumy a dotazníky MeSH
- šikana * MeSH
- sociální chování MeSH
- sociální normy * MeSH
- studenti psychologie MeSH
- vyrovnaná skupina * MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Německo MeSH
BACKGROUND: Maternal mental health during pregnancy is important for optimal brain development in the offspring. Exposure to maternal depression in utero was associated with accelerated global cortical brain aging in young adulthood. However, it is not clear whether maternal antenatal depression (MAD) might also predict region-specific deviations from normative development of cortical thickness, surface area, and subcortical volume in the offspring and whether they stay stable throughout the third decade of life. METHODS: Two neuroimaging follow-ups of a prenatal birth cohort in young adulthood tested whether MAD might be associated with deviations from normative brain development in the offspring in the early and late 20s, as modeled using 37407 MRI images from individuals 3-90 years old (CentileBrain). RESULTS: MAD predicted deviations from normative development of thalamus and nucleus accumbens but not other subcortical volumes, surface area, or cortical thickness. Women exposed to greater MAD showed a smaller thalamus and nucleus accumbens in both the early and late 20s than expected based on the age- and sex normative means. In contrast, men exposed to greater MAD showed no deviations from the development of the thalamus but a larger nucleus accumbens in the late 20s than expected based on the age- and sex normative means. CONCLUSIONS: Given the importance of thalamus in the pathogenesis of major depressive disorder and the critical role of nucleus accumbens in reward and motivation, the altered development of these subcortical structures might contribute to a higher risk of depression.
- Klíčová slova
- Maternal antenatal depression, longitudinal study, normative brain development, nucleus accumbens, thalamus, young adulthood,
- Publikační typ
- časopisecké články MeSH
This study investigated whether adolescents' readiness for non-normative political participation (i.e., readiness to confront social rules for political reasons) was predicted by their interpersonal problems (with parents, teachers, and classmates), low optimism, and political beliefs (political self-efficacy and distrust in public institutions). A structural equation model using two-wave longitudinal data from Czech high school students (N = 768; 54% females; age range at T1 = 14-17, M = 15.97; T2 data collected 1.5 years later) showed that the changes in adolescents' readiness for non-normative participation were predicted by their lower institutional trust. Interpersonal relationships or optimism had no cross-sectional or longitudinal effect on the readiness for non-normative participation. These results suggest that the main source of adolescents' readiness for non-normative political actions lies in their political beliefs, while the effect of adolescents' interpersonal problems is less clear.
- Klíčová slova
- Institutional trust, Interpersonal relationships, Non-normative political participation, Optimism, Political self-efficacy,
- MeSH
- analýza latentních tříd MeSH
- chování mladistvých psychologie MeSH
- důvěra psychologie MeSH
- interpersonální vztahy * MeSH
- kultura MeSH
- lidé MeSH
- mladiství MeSH
- optimismus psychologie MeSH
- politika * MeSH
- průřezové studie MeSH
- rodiče MeSH
- sebeuplatnění MeSH
- studenti psychologie MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
We provide here normative values of yearly percentage brain volume change (PBVC/y) as obtained with Structural Imaging Evaluation, using Normalization, of Atrophy, a widely used open-source software, developing a PBVC/y calculator for assessing the deviation from the expected PBVC/y in patients with neurological disorders. We assessed multicenter (34 centers, 11 acquisition protocols) magnetic resonance imaging data of 720 healthy participants covering the whole adult lifespan (16-90 years). Data of 421 participants with a follow-up > 6 months were used to obtain the normative values for PBVC/y and data of 392 participants with a follow-up <1 month were selected to assess the intrasubject variability of the brain volume measurement. A mixed model evaluated PBVC/y dependence on age, sex, and magnetic resonance imaging parameters (scan vendor and magnetic field strength). PBVC/y was associated with age (p < 0.001), with 60- to 70-year-old participants showing twice more volume decrease than participants aged 30-40 years. PBVC/y was also associated with magnetic field strength, with higher decreases when measured by 1.5T than 3T scanners (p < 0.001). The variability of PBVC/y normative percentiles was narrower as the interscan interval was longer (e.g., 80th normative percentile was 50% smaller for participants with 2-year than with 1-year follow-up). The use of these normative data, eased by the freely available calculator, might help in better discriminating pathological from physiological conditions in the clinical setting.
- Klíčová slova
- Aging, Atrophy, Brain volume, MRI, Normative data,
- MeSH
- atrofie MeSH
- difuzní magnetická rezonance MeSH
- dlouhověkost * MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mozek diagnostické zobrazování patologie MeSH
- multicentrické studie jako téma MeSH
- retrospektivní studie MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- stárnutí patologie MeSH
- velikost orgánu MeSH
- zobrazování trojrozměrné MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The principal aim of our study was to present norms for old and very old Czech adults on the Czech version of the Montreal Cognitive Assessment (MoCA) and investigate the influence of social and demographic factors on MoCA performance. We analyzed 540 adults aged ≥ 60 years (5-year age categories; nationally representative sample in terms of sex and educational level), who met strict inclusion criteria for the absence of neurodegenerative disorders and performed within normal range in neuropsychological assessment. Using multiple regression model, we found that MoCA performance was affected by age and education (both p < .001) but not sex. The study provides normed percentile estimates for MoCA performance stratified by age (60-74 years; ≥ 75 years) and education lower versus higher. We also present percentile equivalents for the MoCA and Mini-Mental State Examination (MMSE) for use in clinical practice. We found age- and education-related effects on MoCA performance which support the use of culturally adapted normative data.
- Klíčová slova
- Ageing, Mini-Mental State Examination, Montreal Cognitive Assessment, cognition, normative data, screening,
- MeSH
- analýza rozptylu MeSH
- geriatrické hodnocení * MeSH
- kognice fyziologie MeSH
- lidé středního věku MeSH
- lidé MeSH
- longitudinální studie MeSH
- neuropsychologické testy MeSH
- referenční hodnoty MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- stárnutí psychologie MeSH
- věkové faktory MeSH
- záznam o duševním stavu MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH
Accurately predicting contact between our bodies and environmental objects is paramount to our evolutionary survival. It has been hypothesized that multisensory neurons responding both to touch on the body, and to auditory or visual stimuli occurring near them-thus delineating our peripersonal space (PPS)-may be a critical player in this computation. However, we lack a normative account (i.e., a model specifying how we ought to compute) linking impact prediction and PPS encoding. Here, we leverage Bayesian Decision Theory to develop such a model and show that it recapitulates many of the characteristics of PPS. Namely, a normative model of impact prediction (i) delineates a graded boundary between near and far space, (ii) demonstrates an enlargement of PPS as the speed of incoming stimuli increases, (iii) shows stronger contact prediction for looming than receding stimuli-but critically is still present for receding stimuli when observation uncertainty is non-zero-, (iv) scales with the value we attribute to environmental objects, and finally (v) can account for the differing sizes of PPS for different body parts. Together, these modeling results support the conjecture that PPS reflects the computation of impact prediction, and make a number of testable predictions for future empirical studies.
BACKGROUND: A declining cognitive performance is a hallmark of Huntington's disease (HD). The neuropsychological battery of the Unified HD Rating Scale (UHDRS'99) is commonly used for assessing cognition. However, there is a need to identify and minimize the impact of confounding factors, such as language, gender, age, and education level on cognitive decline. OBJECTIVES: Aim is to provide appropriate, normative data to allow clinicians to identify disease-associated cognitive decline in diverse HD populations by compensating for the impact of confounding factors METHODS: Sample data, N = 3267 (60.5% females; mean age of 46.9 years (SD = 14.61, range 18-86) of healthy controls were used to create a normative dataset. For each neuropsychological test, a Bayesian generalized additive model with age, education, gender, and language as predictors was constructed to appropriately stratify the normative dataset. RESULTS: With advancing age, there was a non-linear decline in cognitive performance. In addition, performance was dependent on educational levels and language in all tests. Gender had a more limited impact. Standardized scores have been calculated to ease the interpretation of an individual's test outcome. A web-based online tool has been created to provide free access to normative data. CONCLUSION: For defined neuropsychological tests, the impact of gender, age, education, and language as factors confounding disease-associated cognitive decline can be minimized at the level of a single patient examination.
- Klíčová slova
- Cognition, Cognitive decline, Huntington’s disease, Neuropsychological testing, Normative data, Online calculator,
- MeSH
- Bayesova věta MeSH
- Huntingtonova nemoc * komplikace diagnóza MeSH
- jazyk (prostředek komunikace) MeSH
- kognice MeSH
- lidé středního věku MeSH
- lidé MeSH
- neuropsychologické testy MeSH
- stupeň vzdělání MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
OBJECTIVE: The aim of this study was to provide normative data for older and very old Czech adults on the Prague Stroop Test (PST) and to test its discriminative validity in individuals with Parkinson's disease mild cognitive impairment (PD-MCI). METHOD: The construction of the PST was modeled after the Victoria Stroop Test. We examined 539 participants aged 60-96 that met strict inclusion criteria. After, we compared the PST scores for a group of 45 PD-MCI patients with a healthy adult sample (HAS) of 45 age- and education-matched individuals. RESULTS: I. In the non-clinical sample, robust age- and education-related influences were observed on all PST scores. No gender effect was noted. II. For clinical cases, interference condition (PST-C) was able to discriminate between PD-MCI and HAS (all scores ps < .01). Area under the curve (AUC) was 77% when a screening cut-off of ≤ 27 s was used, showing sensitivity of 82% and specificity of 53%. A more conservative diagnostic cut-off of ≤ 33 s showed sensitivity of 60% and specificity of 80%. DISCUSSION: The present study provides PST normative data for basic, interference, and error scores stratified by age (60-96 years). PST appears to be a helpful tool for the diagnostics of PD-MCI especially in research settings at Level II (Litvan et al., 2012) and for PD-MCI attention/working memory and executive function subtyping.
- Klíčová slova
- Aging, Inhibition, Mild cognitive impairment, Normative data, Parkinson’s disease, Stroop Test,
- MeSH
- analýza rozptylu MeSH
- diskriminační analýza MeSH
- funkční lateralita MeSH
- kognitivní dysfunkce * diagnóza epidemiologie etiologie MeSH
- lidé středního věku MeSH
- lidé MeSH
- longitudinální studie MeSH
- Parkinsonova nemoc komplikace epidemiologie MeSH
- referenční hodnoty MeSH
- ROC křivka MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- Stroopův test normy MeSH
- věkové rozložení MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
The Clock Drawing Test (CDT) is a commonly used tool in clinical practice and research for cognitive screening among older adults. The main goal of the present study was to analyze the interrater reliability of three different CDT scoring systems (by Shulman et al., Babins et al., and Cohen et al.). We used a clock with a predrawn circle. The CDT was evaluated by three independent raters based on the normative data set of healthy older and very old adults and patients with nonamnestic mild cognitive impairment (naMCI; N = 438; aged 61-94). We confirmed a high interrater reliability measured by the intraclass correlation coefficients (ICCs): Shulman ICC = .809, Babins ICC = .894, and Cohen ICC = .862, all p < .001. We found that age and education levels have a significant effect on CDT performance, yet there was no influence of gender. Finally, the scoring systems differentiated between naMCI and age- and education-matched controls: Shulman's area under the receiver operating characteristic curve (AUC) = .84, Cohen AUC = .71, all p < .001; and a slightly lower discriminative ability was shown by Babins: AUC = .65, p = .012.
- Klíčová slova
- Clock Drawing Test, cognitive screening, mild cognitive impairment, normative data, reliability, scoring systems,
- MeSH
- kognitivní dysfunkce diagnóza MeSH
- lidé středního věku MeSH
- lidé MeSH
- nemocnice univerzitní MeSH
- neparametrická statistika MeSH
- neuropsychologické testy normy MeSH
- reprodukovatelnost výsledků MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- studie případů a kontrol MeSH
- věkové rozložení MeSH
- zdravé stárnutí psychologie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Česká republika MeSH