Update README.md

Author: manishsaggar1

README.md

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 # rdoc-lfa
 Latent factor analysis for validating RDoC framework using task contrasts
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+Please cite this work if you use the code/data:
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+A Data-Driven Latent Variable Approach to Validating the Research Domain Criteria (RDoC) Framework
+Quah S.K.L., Jo B., Geniesse C., Uddin L.Q., Mumford J.A., Barch D.M., Fair D.A., Gotlib I.H., Poldrack, R.A., Saggar M. 2024. BioRxiv
+https://www.biorxiv.org/content/10.1101/2024.01.31.577486v2