What is Janus' operational definition of attractiveness

A) The symmetry of a face.
B) The likelihood of a participant pressing the green button in response to a face.
C) The asymmetry of a face.
D) The likelihood of a participant pressing the green button in response to an asymmetrical face.

Operational Definition

A clear, precise description of a variable, term, or object in terms of the operations or processes used to observe and measure it.

Attractiveness

A quality that makes a person, place, thing, or idea appealing to the senses, mind, or emotions, often leading to positive regard or interest.