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Blinking, an involuntary and often overlooked facial expression, is a fundamental aspect of human communication and physiology. Beyond its basic function of moistening the eyes, blinking serves as a complex non-verbal cue that conveys various emotions, intentions, and social signals. In this blog post, we delve into the fascinating world of blinking, exploring its hidden depths and appreciating its unsung significance.

Understanding the Blink: A Tiny Twinkle with Big Impact

Blinking is the rapid closure and opening of the eyelids. It is a semi-autonomic processOpens in new window that occurs naturally whereby the eyelidsOpens in new window wipe the eyes clean, much as a windscreen wiper on a car.

This seemingly simple action involves a symphony of muscles and nerves, orchestrated by the brainstem. The blink reflex, triggered by dryness, irritation, or even incoming light, ensures our eyes stay lubricated and protected. In other words, when we blink, our eyelids spread a cocktail of oils and mucous secretions across the surface of the eye to keep its globes from drying out.

Beyond Lubrication

While the blink's primary function is undoubtedly physiological, it also plays a crucial role in social communication. Studies have shown that the frequency and type of blinks can convey a range of emotions and intentions:

  • Rapid blinking: Often associated with nervousness, anxiety, or even deception.
  • Slow blinking: Can signal confidence, disinterest, or even flirtation.
  • Prolonged eye closure: Might suggest deep thought, sadness, or fatigue.
  • Involuntary blinks: Can occur during moments of surprise or heightened attention.

Beyond emotional cues, blinks can also punctuate conversation, providing subtle signals to the speaker when it's their turn to talk. Blinking can also signal the end of a thought, prompting the listener to respond. Studies have shown that well-timed blinks can actually make us appear more likable and trustworthy. Conversely, excessive blinking can be perceived as nervousness or anxiety.

Decoding the Communicative Features of Blinking

  1. Blink Frequency and Emotional States

    On average, individuals blink around 10 times per minute, with each blink lasting no more than a tenth of a second. The frequency of blinking can be a powerful indicator of an individual's emotional state. A heightened blink rate, reaching up to a hundred blinks per minute, may signify emotional stress, reflecting arousal in situations triggering the fight or flight response.

  2. Blinking and Deception

    Contrary to popular belief, blink rate alone is not a reliable sign of deception. However, a lack of blinking can indicate various states, from being in a trance or asleep with eyes open to expressing extreme hostility or profound indifference.

  3. Blinking During Vocalizations

    Studies have shown that blinking is not confined to passive moments. It occurs actively during vocalizations, specifically at the onset of words and utterances, typically aligning with the initial vowel of the word (Condon and Ogston, 1996).

  4. Eyelid Manipulation as a Social Signal

    Certain individuals exhibit a distinctive mannerism of periodically shutting their eyelids for two or three seconds while speaking. This behavior can be indicative of feelings of disinterest, boredom, or superiority, as the person attempts to create a figurative barrier between themselves and their interlocutor. This action can leave the listener with a sense of exclusion, contributing to a perceived distance in the conversation.

  5. Synchronized Blinking and Connection

    Interestingly, individuals who share a connection may exhibit a synchronization of blink rates. This non-conscious mirroring further emphasizes the interconnected nature of human communication, where even the subtleties of blinking contribute to a shared experience.

  6. Infrequent Blinking and its Interpretations

    Infrequent blinking, when observed independently, may not offer a singular clue to an individual's state of mind. It can signal boredom if the eyes lack focus or, conversely, intense concentration when accompanied by a sharply focused gaze. Additionally, an infrequent blink rate might be coupled with signals of hostility or negativity, making it a nuanced but not necessarily definitive element in interpreting body language (Businessballs, 2011).


In conclusion, the unassuming act of blinking holds a wealth of information about our internal states and interpersonal dynamics. By understanding the nuances of blink frequency, duration, and context, we unlock a new dimension in decoding the intricate language of non-verbal communication. From emotional stress to social signals, blinking serves as an unspoken yet powerful means of expression in the rich tapestry of human interaction.

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