Peng Y, Knotts JD, Taylor CT, Craske MG, Stein MB, Bookheimer S, Young KS, Simmons AN, Yeh HW, Ruiz J, Paulus MP. Failure to Identify Robust Latent Variables of Positive or Negative Valence Processing Across Units of Analysis. Biol Psychiatry Cogn Neurosci Neuroimaging. 2021 05; 6(5):518-526.