Poster A31, Saturday, March 24, 1:30–3:30 pm, Exhibit Hall C
Temporal metacognition as the decoding of internally generated brain dynamics
Tadeusz Kononowicz1, Clemence Roger2, Virginie van Wassenhove1; 1CEA/DRF NeuroSpin - INSERM Cognitive Neuroimaging Unit, 2University of Lille
Metacognition, the ability to know about one’s thought process, is self-referential. Here, we studied the brain mechanisms underlying metacognitive inferences in an internally generated behavior. Human participants generated a time interval, and retrospectively evaluated the signed magnitude of their timing (first and second order behavioral judgments, respectively) while being recorded with magnetoencephalography. We show that participants could reliably track the magnitude of internally generated time intervals providing evidence for the metacognitive inference process tracking produced duration. Previously associated with timing, beta power (β; 15-40 Hz) tracked internal time estimation but only when participants correctly estimated the magnitude of the produced interval. Additionally, as indicated by demixed Principal Component Analysis, the larger spread of an individual’s β power state-space trajectories during timing was indicative of more accurate individual’s metacognitive inference. Our results suggest that network inhibition (β power) instantiates a state variable determining future network trajectory; this naturally provides a code for duration and metacognitive inferences would consist in reading out this state variable. Altogether, our study describes oscillatory mechanisms for timing suggesting that temporal metacognition relies on inferential processes of internally-generated dynamics.
Topic Area: EXECUTIVE PROCESSES: Monitoring & inhibitory control