Definition
Nonverbal cues are the signals — facial expressions, body posture, gesture, gaze direction, interpersonal distance, vocal tone and rhythm, micro-expressions, and touch — through which people continuously communicate emotional state, social intent, dominance, affiliation, and deception, largely outside conscious deliberate control.
Goleman frames nonverbal literacy — the accurate reading and sending of these signals — as a foundational component of other focus and social intelligence: the channel through which emotional states "flow" between people and the substrate on which empathy operates.
Why it matters
How it works
Ekman's universals and the FACS system
Paul Ekman's fieldwork in Papua New Guinea in the 1960s — showing that an isolated preliterate culture with no exposure to Western media recognized the same facial expressions for basic emotions — established the biological-universalist position in the nature-vs-nurture debate about emotional expression. Ekman subsequently developed the Facial Action Coding System (FACS), a comprehensive taxonomy of all observable facial muscle movements (action units), enabling frame-by-frame coding of expressions with high inter-rater reliability. FACS-trained observers detect micro-expressions — expressions lasting 1/25th to 1/5th of a second — that leak genuine emotion through deceptive displays.
The primacy of tone and timing
Prosody — the rhythm, melody, pace, and intensity of speech — carries emotional content largely independent of the words spoken. Mehrabian's research (1967–1971) on the relative impact of words vs. tone vs. face in conveying emotional attitude found that tone accounted for 38% and facial expression 55% of the total impact, leaving words at 7%. This ratio applies specifically to emotional attitude communication; it does not generalize to all communication as the popular misquotation suggests. For factual content, words carry far more.
Social attunement and the rapport signal
Goleman draws on work by John Gottman, Nalini Ambady, and Daniel Stern to describe how moment-to-moment nonverbal matching — posture mirroring, vocal rhythm coordination, gaze reciprocity — produces rapport and is reliably detected by observers (and participants) as an implicit signal of connection or disconnection. Ambady's "thin slices" research found that ratings of teacher effectiveness based on 30-second silent video clips correlated substantially with end-of-semester student evaluations — nonverbal attunement was being assessed in seconds.
Reading vs. sending
Most people are more accurate at reading others' nonverbal cues than at managing their own nonverbal output. Goleman notes that leaders who are poor senders — whose vocal tone or facial expression contradicts their verbal message — create cognitive dissonance in followers that undermines trust. Because nonverbal signals are largely automatic and difficult to sustain under deception, congruence between verbal and nonverbal channels is itself a cue to authenticity.