Which researchers investigated menstrual synchrony?

• A. McClinton and Stern
• B. Smith and Wesson
• C. Bowlby and Ainsworth
• D. Darwin and Wallace

Answer: (A)

The research on menstrual synchrony was notably investigated by McClintock and Stern. These researchers conducted a study in the 1970s that suggested that women living in close proximity may experience synchronization of their menstrual cycles. This phenomenon is known as the McClintock effect, which posits that pheromonal communication could play a role in synchronizing cycles among women.

The other groups mentioned in the options are known for different contributions in psychology and biology. Smith and Wesson are not recognized researchers in this context, as they are associated with firearms rather than psychological studies. Bowlby and Ainsworth are renowned for their work on attachment theory, focusing on the emotional bonds between caregivers and children, which does not involve menstrual synchrony. Similarly, Darwin and Wallace are celebrated for their contributions to the theory of evolution, not for research related to menstrual cycles. Thus, McClintock and Stern are the correct researchers associated with the study of menstrual synchrony.