1. Making Cognitive Latent Variables Manifest: Distinct Neural Networks for Fluid Reasoning and Processing Speed Habeck, Christian G.; Steffener, Jason; Barulli, Daniel James; Gazes, Yunglin; Razlighi, Qolamreza R.; Shaked, Danielle; Salthouse, Timothy; Stern, Yaakov 2015 Articles Reasoning (Psychology)Human information processingIntellectNeural networks (Neurobiology)NeurosciencesCognitive psychology