Brain idiosyncrasy during biological-motion perception is amplified in autistic individuals with intellectual impairment.
The 5 matches · 1 of them tie a paragraph to a whole file without given lines: a weak match, whose lines are not tinted
- [1] § Methods › Brain behaviour correlations ↔ ScatterplotGAM.Rmd, lines 6 to 32 · score 0.69 · SNAP IV, VABS ABC, GAMs, score, CSS, GEC · Report a mismatch
- [2] § Methods › Idiosyncrasy ↔ CalculateVariability.R, the whole file · a weak match · score 0.67 · correlational distance, TDC reference, vector, ROI, metrics, variability · Report a mismatch
- [3] § Results › Transdiagnostic correlations between VariabilityWhole and cognitive/behavioural traits ↔ ScatterplotGAM.Rmd, lines 6 to 32 · score 0.58 · SNAP IV, VABS ABC, CSS, GEC, NVIQ, RBS · Report a mismatch
- [4] § Results › Transdiagnostic correlations between VariabilityWhole and cognitive/behavioural traits ↔ ScatterplotGAM.Rmd, lines 107 to 126 · score 0.58 · SNAP IV, VABS ABC, Scatterplots, fits, CSS, GEC · Report a mismatch
- [5] § Methods › Idiosyncrasy ↔ IdiosyncrasyUtilities.R, lines 24 to 45 · score 0.52 · correlational distance, ROI, matrix, metrics, diagnostic, ASC IA · Report a mismatch
Paper
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The authors' code
R Markdown · 159 lines · 6.1 KB · other · 3 matches
- ---
- ScatterplotGAM.Rmd
- This script is used to fit the generalized additive models (GAMs) and plot them with scatterplots. (Fig 4, Fig S3-7, Table S2, Table S4)
- ---
- ```{r}
- #loading data
- source('IdiosyncrasyUtilities.R')
- library(tibble)
- library(lsr)
- library(ggplot2)
- male.only <- FALSE #sensitivity analysis
- all.linear <- FALSE #should all behavioural regressors be treated as linear?
- #df.var.behav <- load.data("Schaefer200+Tian+Suit_spmT_0001_var_scores.csv", male.only)
- df.var.behav <- load.data('data/variability_behaviour.csv', male.only)
- var.type <- 'var.whole' #options: var.whole, var.within, var.tdc
- #psych.tests <- c('ADOS-2 CSS', 'NVIQ','VABS-ABC', 'SRS Total', 'RBS-R Total', 'SSP Total', 'BRIEF-GEC', 'SNAP-IV Total')
- psych.tests <- c('nviq','rbs.total','srs.t','ssp.total', 'ados', 'brief.gec', 'snap.t', 'vabs.total')
- test.labels <- c('ados'= 'ADOS-2 CSS', 'nviq' = 'NVIQ', 'vabs.total' = 'VABS-ABC', 'srs.t'= 'SRS Total', 'rbs.total' = 'RBS-R Total', 'ssp.total' = 'SSP Total', 'brief.gec' = 'BRIEF-GEC', 'snap.t' = 'SNAP-IV Total')
- var.labels <- c('var.whole' = 'Whole', 'var.within' = 'Within', 'var.tdc' = 'TDC')
- linear <- c('ados', 'snap.t', 'vabs.total', 'brief.gec')
- ```
- ```{r}
- #Statistical significance table (Table S2, S4)
- df.sig <- data.frame(behav.p = rep(NA, length(psych.tests)),
- age.p = rep(NA, length(psych.tests)),
- fd.p = rep(NA, length(psych.tests)))
- if (!male.only){
- add_column(df.sig, sex.p = rep(NA, length(psych.tests)), .after = 'age.p')
- }
- for (i in 1:length(psych.tests)){
- #define gam
- test <- psych.tests[i] #column name of psych test in df.var.behav
- current.data <- df.var.behav[!is.na(df.var.behav[test]),] #remove participants with missing values for current psych test
- current.gam <- fit.gam(test = test, linear = linear, male.only = male.only, current.data = current.data)
- if (test %in% linear){
- df.sig[i, 'behav.p'] <- summary(current.gam)$p.pv['get(test)']
- } else {
- df.sig[i, 'behav.p'] <- summary(current.gam)$s.table['s(get(test))', 'p-value']
- }
- df.sig[i, 'age.p'] <- summary(current.gam)$p.pv['age']
- if (!male.only){
- df.sig[i, 'sex.p'] <- summary(current.gam)$p.pv['sex1']
- }
- df.sig[i, 'fd.p'] <- summary(current.gam)$s.table['s(mean.fd)', 'p-value']
- df.sig[i, 'r2.adj'] <- summary(current.gam)$r.sq
- }
- n.vars <- 4 - male.only
- orig.vars <- colnames(df.sig)
- for (i in 1:n.vars){
- #T/F statistic
- if (orig.vars[i] == 'sex.p'){
- pred.name <- 'sex1'
- } else if (orig.vars[i] == 'fd.p'){
- pred.name <- 'mean.fd'
- } else{
- pred.name <- strsplit(orig.vars[i], '.', fixed = TRUE)[[1]][1]
- }
- tf.name <- paste(strsplit(orig.vars[i], '.', fixed = TRUE)[[1]][1], '.tf', sep = '')
- df.sig <- add_column(df.sig, '{tf.name}' := sapply(psych.tests, get.tf, linear = linear, var.type = var.type, predictor = pred.name, df = df.var.behav, male.only = male.only), .before = orig.vars[i])
- q.name <- paste(strsplit(orig.vars[i], '.', fixed = TRUE)[[1]][1], '.q', sep = '')
- df.sig <- add_column(df.sig, '{q.name}' := p.adjust(df.sig[,orig.vars[i]], method = 'BH'), .after = orig.vars[i])
- sig.name <- paste(strsplit(orig.vars[i], '.', fixed = TRUE)[[1]][1], '.sig', sep = '')
- df.sig <- add_column(df.sig, '{sig.name}' := df.sig[,q.name] <= 0.05, .after = q.name)
- }
- df.sig <- add_column(df.sig, test = psych.tests, .before = 'behav.tf')
- df.sig
- ```
- ```{r}
- #Write results to csv (Table S2, S4)
- if (male.only){
- csv.name <- paste('tables/table_s4/table_s4.csv')
- } else{
- csv.name <- paste('tables/table_s2/table_s2.csv')
- }
- write.csv(df.sig, csv.name, row.names = FALSE)
- ```
- ```{r}
- #Create single scatterplot
- test <- 'nviq' #options in test.labels
- current.data <- df.var.behav[!is.na(df.var.behav[test]),]
- current.gam <- fit.gam(test = test, linear = linear, male.only = male.only, current.data = current.data)
- #test.labels <- c('ados'= 'ADOS-2 CSS', 'nviq' = 'NVIQ', 'vabs.total' = 'VABS-ABC', 'srs.t'= 'SRS Total', 'rbs.total' = 'RBS-R Total', 'ssp.total' = 'SSP Total', 'brief.gec' = 'BRIEF-GEC', 'snap.t' = 'SNAP-IV Total')
- var.labels <- c('var.whole' = 'Whole', 'var.within' = 'Within', 'var.tdc' = 'TDC')
- group.colours <- c('TDC' = 'blue', 'ASC' = 'red')
- scatterplot <- fit.scatterplot(test = test, current.data = current.data, var.type = var.type, linear = linear, var.labels = var.labels, group.colours = group.colours, current.gam = current.gam)
- plot(scatterplot)
- #save as image
- #ggsave(filename = "name your plot", scatterplot, width=2400, height=1600, units = 'px', dpi=300)
- ```
- ```{r}
- group.colours <- c('TDC' = 'blue', 'ASC' = 'red')
- if (var.type == 'var.whole' & !all.linear){
- fig.num <- 'fig_4'
- } else if (var.type == 'var.within' & !all.linear){
- fig.num <- 'fig_s3'
- } else if (var.type == 'var.tdc' & !all.linear){
- fig.num <- 'fig_s4'
- } else if (var.type == 'var.whole' & all.linear){
- fig.num <- 'fig_s5'
- } else if (var.type == 'var.within' & all.linear){
- fig.num <- 'fig_s6'
- } else if (var.type == 'var.tdc' & all.linear){
- fig.num <- 'fig_s7'
- }
- for (test in names(test.labels)){
- current.data <- df.var.behav[!is.na(df.var.behav[test]),]
- if (!all.linear){
- current.gam <- fit.gam(test = test, linear = linear, male.only = male.only, current.data = current.data)
- scatterplot <- fit.scatterplot(test = test, current.data = current.data, var.type = var.type, linear = linear, var.labels = var.labels, group.colours = group.colours, current.gam = current.gam)
- } else{
- current.gam <- fit.gam(test = test, linear = psych.tests, male.only = male.only, current.data = current.data)
- scatterplot <- fit.scatterplot(test = test, current.data = current.data, var.type = var.type, linear = psych.tests, var.labels = var.labels, group.colours = group.colours, current.gam = current.gam) #all psych tests are linear
- }
- plot(scatterplot)
- scatterplot_path <- paste('figures/', fig.num, '/', test, '_scatterplot.tiff',sep = '')
- ggsave(filename = scatterplot_path, scatterplot, width=2400, height=1600, units = 'px', dpi=300)
- }
- ```
ScatterplotGAM.Rmd at commit e1b8523, under other · at the source
Overview
13 affiliations
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, ON Canada
- Azrieli Adult Neurodevelopmental Centre, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, 1025 Queen St West – 3314, Toronto, ON M6J 1H4 Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON Canada
- Department of Psychiatry, Temerty Faculty of Medicine, University of Toronto, Toronto, ON Canada
- Independent Scholar (with George Washington University, USA While This Study Was Being Conducted), Washington D.C., USA
- Department of Psychiatry, Chang, Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Medical Imaging and Radiological Sciences, Chang Gung University, Taoyuan, Taiwan
- Department of Psychiatry, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
- Department of Psychiatry, University of Oxford, Oxford, UK
- Department of Psychiatry, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
- YuNing Clinic, Taipei, Taiwan
- Department of Psychology, National Taiwan University, Taipei, Taiwan
Abstract
Background: Neuroimaging research in autism spectrum condition (ASC) often overlooks brain idiosyncrasy by focusing on group averages and frequently excludes individuals with co-occurring intellectual impairment (II).
Methods: We investigated functional MRI correlates of passive biological motion (BM) perception, comparing typically developing controls (TDC; n = 33), autistic individuals without II (intellectually able; ASC-IA; n = 28), and autistic individuals with II (ASC-II; n = 19; defined by IQ or adaptive function < 85).
Results: While standard group-average analyses revealed the expected BM-sensitive regions (e.g., bilateral posterior superior temporal sulci, cuneus) in the TDC and ASC-IA groups, the ASC-II group showed no consistent group-level activation pattern and exhibited greater activation in the right intraparietal sulcus compared to the ASC-IA group. Using a correlational distance-based metric, we quantified brain idiosyncrasy (“whole-sample brain variability”, VariabilityWhole), representing the deviance of an individual's activation pattern from others. Brain activity in the ASC-II group was significantly more idiosyncratic than the ASC-IA and TDC groups. Furthermore, VariabilityWhole showed significant transdiagnostic correlations with multiple cognitive and behavioural domains relevant to autism, including social difficulties, repetitive behaviours, non-verbal IQ, executive function, sensory hyper/
Conclusions: Key limitations include the cross-sectional design and the use of a passive viewing task without a concurrent behavioral measure to directly link brain findings to task performance. These findings highlight substantial brain heterogeneity within the autism spectrum, particularly in the understudied ASC-II subgroup, and suggest that individual differences in brain processing patterns, rather than solely group-average differences, are critically linked to clinical and cognitive phenotypes.
Supplementary Information: The online version contains supplementary material available at 10.1186/
Reproduced under the paper's license (CC BY), from the paper cited above.
Repository
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chichael-meng/Brain-idiosyncrasy-in-autism
e1b8523bf1151729ee7a9561e931506866bf4069, 26 June 2026Availability: 1 check, the latest on 30 September 2026: the link answers
- 30 September 2026: the link answers
8 files
- CalculateVariability.R, R, 33 lines, 1 match
- Demographics.Rmd, R, 93 lines
- GroupVarComparison.Rmd, R, 353 lines
- IdiosyncrasyUtilities.R, R, 161 lines, 1 match
- RaincloudPlots.Rmd, R, 378 lines
- ScatterplotGAM.Rmd, R, 159 lines, 3 matches
- LICENSE.txt, License, 52 lines
- README.md, Text, 63 lines
The paper's code and data availability statement is in the Data section.
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Data
No dataset and no data link were found in the paper.
Data availability
The data that support the findings of this study are available from the corresponding author, HYL, upon reasonable request. Public availability of the raw data is restricted by the Research Ethics Committee of the National Taiwan University Hospital in the interest of participant confidentiality. The analysis scripts (R code) used for measuring brain idiosyncrasy and performing statistical analyses are available at https://
Reproduced under the paper's license (CC BY), from the paper cited above.
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Version 1, 30 September 2026: the first record
Recorded: type, language, journal, volume, issue, pages, dates, 12 authors, 7 keywords, 13 MeSH terms, 4 funders, 92 references.
Cite
This paper
Cheng, M., Hawco, C., Yang, D., Ni, H.-C., Yeh, C.-H., Chang, J.-C., Tu, E.-N., Hsu, M.-Y., Wu, Y.-Y., Chou, T.-L., Gau, S. S.-F., & Lin, H.-Y. (2026). Brain idiosyncrasy during biological-motion perception is amplified in autistic individuals with intellectual impairment. Journal of neurodevelopmental disorders, 18(1), 31. https://
BibTeX
@article{cheng2026brain,
author = {Cheng, Michael and Hawco, Colin and Yang, Daniel and Ni, Hsing-Chang and Yeh, Chun-Hung and Chang, Jung-Chi and Tu, En-Nien and Hsu, Mei-Yun and Wu, Yu-Yu and Chou, Tai-Li and Gau, Susan Shur-Fen and Lin, Hsiang-Yuan},
title = {{Brain idiosyncrasy during biological-motion perception is amplified in autistic individuals with intellectual impairment}},
journal = {Journal of neurodevelopmental disorders},
year = {2026},
month = mar,
volume = {18},
number = {1},
pages = {31},
publisher = {BMC},
issn = {1866-1947},
doi = {10.1186/
url = {https://
pmid = {41882534},
pmcid = {PMC13217712}
}
RIS
TY - JOUR
AU - Cheng, Michael
AU - Hawco, Colin
AU - Yang, Daniel
AU - Ni, Hsing-Chang
AU - Yeh, Chun-Hung
AU - Chang, Jung-Chi
AU - Tu, En-Nien
AU - Hsu, Mei-Yun
AU - Wu, Yu-Yu
AU - Chou, Tai-Li
AU - Gau, Susan Shur-Fen
AU - Lin, Hsiang-Yuan
TI - Brain idiosyncrasy during biological-motion perception is amplified in autistic individuals with intellectual impairment
T2 - Journal of neurodevelopmental disorders
J2 - J Neurodev Disord
PY - 2026
DA - 2026/
VL - 18
IS - 1
SP - 31
SN - 1866-1947
PB - BMC
DO - 10.1186/
UR - https://
LA - en
ER -
CSL-JSON
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