Consciousness research faces the challenge of combining subjective experience with objective neural data. Francisco Varela pioneered empirical approaches that bridge these sources. His neurophenomenological framework integrates first-person reports with neural measures, and his team discovered gamma-band phase synchronization as a neural marker of perceptual awareness. Varela also contributed to the study of time consciousness by combining subjective reports with neural measures. This review outlines key conceptual distinctions and philosophical challenges in consciousness research, highlighting Varela's non-reductive, comprehensive methodology.
Neurophenomenology aims to bridge qualitative and quantitative methods in consciousness research through reciprocal constraints between first-person accounts and neurophysiological data, but has faced methodological difficulties in systematically obtaining and analyzing subjective reports. Recently developed second-person methods—interview techniques that elicit verbal and non-verbal information—offer a way to obtain detailed subjective reports. This paper examines the potential of second-person methodologies for neurophenomenology, describes available interview techniques, analyzes two experimental studies that incorporate them, and identifies the validation problem of comparing results across participants and interviewers. The authors argue that second-person methods are a powerful approach for closing the gap between experiential and neurobiological levels of description.