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Related Experiment Videos

Kissing laterality and handedness.

Dianne Barrett1, Julian G Greenwood, John F McCullagh

  • 1Stranmillis University College, Belfast, UK.

Laterality
|September 13, 2006
PubMed
Summary

Most people prefer to kiss to the right, regardless of partner influence. This rightward head-turning bias in kissing behavior is likely driven by motor factors, not emotions.

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Area of Science:

  • Psychology
  • Neuroscience
  • Human Behavior

Background:

  • Kissing is a common human behavior with a known tendency for head-turning.
  • Previous research has not fully elucidated the underlying reasons for this directional bias.

Purpose of the Study:

  • To investigate the directionality of kissing behavior in human couples.
  • To determine if partner influence affects head-turning direction during kissing.
  • To explore the role of motor bias versus emotional bias in kissing preferences.

Main Methods:

  • Observational study of kissing couples.
  • Experimental observation of participants kissing a doll's face to isolate individual bias.
  • Analysis of head-turning direction (left vs. right).
  • Comparison of handedness between right- and left-kissers.

Main Results:

  • Approximately 80% of kissing couples exhibited rightward head-turning.
  • Around 77% of participants turned their heads to the right when kissing a doll.
  • No significant difference in handedness was found between individuals who kissed to the right versus to the left.
  • Both right- and left-kissers predominantly showed a rightward kissing bias.

Conclusions:

  • Kissing behavior demonstrates a strong rightward turning bias, independent of the kissing partner.
  • Motor bias, likely related to the dominant hand, is suggested as the primary driver of this kissing preference.
  • Emotional factors appear to play a lesser role in determining the direction of head-turning during kissing.

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