Neural evidence of statistical learning: Efficient detection of visual regularities without awareness

Nicholas B. Turk-Browne, Brian J. Scholl, Marvin M. Chun, Marcia K. Johnson

Research output: Contribution to journalArticle

253 Scopus citations

Abstract

Our environment contains regularities distributed in space and time that can be detected by way of statistical learning. This unsupervised learning occurs without intent or awareness, but little is known about how it relates to other types of learning, how it affects perceptual processing, and how quickly it can occur. Here we use fMRI during statistical learning to explore these questions. Participants viewed statistically structured versus unstructured sequences of shapes while performing a task unrelated to the structure. Robust neural responses to statistical structure were observed, and these responses were notable in four ways: First, responses to structure were observed in the striatum and medial temporal lobe, suggesting that statistical learning may be related to other forms of associative learning and relational memory. Second, statistical regularities yielded greater activation in category-specific visual regions (object-selective lateral occipital cortex and word-selective ventral occipito-temporal cortex), demonstrating that these regions are sensitive to information distributed in time. Third, evidence of learning emerged early during familiarization, showing that statistical learning can operate very quickly and with little exposure. Finally, neural signatures of learning were dissociable from subsequent explicit familiarity, suggesting that learning can occur in the absence of awareness. Overall, our findings help elucidate the underlying nature of statistical learning.

Original languageEnglish (US)
Pages (from-to)1934-1945
Number of pages12
JournalJournal of cognitive neuroscience
Volume21
Issue number10
DOIs
StatePublished - Oct 2009

All Science Journal Classification (ASJC) codes

  • Cognitive Neuroscience

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