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Dynamic time warping (DTW) is an alternative measure of similarity between time series that is robust to such time lags. We used PC fcMRI data and DTW fcMRI data as predictors in machine learning models for classifying autism spectrum disorder (ASD). When combined with dimension reduction techniques, such as principal component analysis, functional connectivity estimated with DTW showed greater predictive ability than functional connectivity estimated with PC. Our results suggest that DTW fcMRI can be a suitable alternative measure that may be characterizing fcMRI in a different, but complementary, way to PC fcMRI that is worth continued investigation. In studying different variants of cross validation (CV), our results suggest that, when it is necessary to tune model hyperparameters and assess model performance at the same time, a <jats:inline-formula>\n                     <a:math xmlns:a=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\">\n                        <a:mi>K<\/a:mi>\n                     <\/a:math>\n                  <\/jats:inline-formula>-fold CV nested within leave-one-out CV may be a competitive contender in terms of performance and computational speed, especially when sample size is not large.<\/jats:p>","DOI":"10.1155\/2023\/8512461","type":"journal-article","created":{"date-parts":[[2023,10,25]],"date-time":"2023-10-25T16:35:09Z","timestamp":1698251709000},"page":"1-13","source":"Crossref","is-referenced-by-count":2,"title":["Assessing Predictive Ability of Dynamic Time Warping Functional Connectivity for ASD Classification"],"prefix":"10.1155","volume":"2023","author":[{"given":"Christopher","family":"Liu","sequence":"first","affiliation":[{"name":"Department of Mathematics and Statistics, San Diego State University, California, USA"},{"name":"Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, California, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5078-485X","authenticated-orcid":true,"given":"Juanjuan","family":"Fan","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Statistics, San Diego State University, California, USA"}]},{"given":"Barbara","family":"Bailey","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Statistics, San Diego State University, California, USA"}]},{"given":"Ralph-Axel","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, California, USA"}]},{"given":"Annika","family":"Linke","sequence":"additional","affiliation":[{"name":"Brain Development Imaging Laboratory, Department of Psychology, San Diego State University, California, USA"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nec.2010.11.001"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1214\/09-STS282"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1152\/jn.00783.2009"},{"key":"4","doi-asserted-by":"publisher","DOI":"10.3389\/fnins.2018.00525"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.1002\/mrdd.20141"},{"key":"6","doi-asserted-by":"publisher","DOI":"10.1093\/cercor\/bhq296"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1007\/s10803-006-0314-8"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.3389\/fnhum.2013.00599"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.1002\/aur.204"},{"key":"10","doi-asserted-by":"publisher","DOI":"10.1093\/brain\/awr263"},{"key":"11","doi-asserted-by":"publisher","DOI":"10.1089\/brain.2017.0496"},{"key":"12","doi-asserted-by":"publisher","DOI":"10.1016\/j.nicl.2014.12.013"},{"key":"13","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms11254"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.0337747100"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1101\/640797"},{"key":"16","doi-asserted-by":"publisher","DOI":"10.1109\/TASSP.1978.1163055"},{"key":"17","doi-asserted-by":"publisher","DOI":"10.18637\/jss.v031.i07"},{"volume-title":"Dynamic Time Warping Algorithm Review","year":"2009","author":"P. 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