Subliminally perceived odours modulate female intrasexual competition: an eye movement study

Area of Science:

• Human behavior and endocrinology
• Neuroscience and chemosensation

Background:

• Subliminal odorants are known to influence human perception and behavior.
• 4,16-androstadien-3-one (androstadienone) is a steroid compound hypothesized to act as a human chemosignal, potentially conveying information about male mate quality.
• The influence of androstadienone on behavior concerning the menstrual cycle remains unclear.

Purpose of the Study:

• To investigate the effects of androstadienone on women's perception of social stimuli.
• To determine if these effects are related to the menstrual cycle and conception risk.
• To explore the role of androstadienone in intrasexual competition.

Main Methods:

• Two experiments were conducted with heterosexual women exposed to androstadienone or a control compound.
• Eye movements were recorded while participants viewed stimuli (female faces, male faces, objects).
• Participants rated the attractiveness of stimuli after exposure.

Main Results:

• Women at high conception risk viewed female faces more than male faces, irrespective of the compound.
• Women at low conception risk showed a preference for female faces only after exposure to androstadienone.
• Androstadienone exposure modulated attention towards female faces in women with low conception risk.

Conclusions:

• A woman's fertility level affects her evaluation of potential competitors during reproductive phases.
• Subliminally perceived androstadienone may enhance intrasexual competition strategies in women during non-conceptive fertility phases.
• Findings contribute to understanding the impact of subliminal body odors on human behavior.