The scent of a handshake

Area of Science:

• Human olfaction
• Chemical signaling
• Social neuroscience

Background:

• The human sense of smell (olfaction) plays a crucial role in social interactions.
• Chemical signals, or odorants, can convey information between individuals.

Purpose of the Study:

• To investigate whether olfactory perception following physical contact, such as a handshake, can reveal chemical signals from others.
• To explore the potential for subconscious chemosensory communication in humans.

Main Methods:

• Participants engaged in handshakes with confederates.
• Participants then smelled their own hands.
• Behavioral and physiological responses were measured.

Main Results:

• Analysis revealed that participants could detect specific chemical signals present on their hands after the handshake.
• These detected signals were associated with changes in mood and social perception.

Conclusions:

• The human hand can act as a vehicle for transmitting chemosensory information.
• Olfactory perception following social contact may contribute to non-verbal social communication.