There is a popular perception that the psychological difference between men and women is substantial - as seen in books such as Men Are From Mars, Women Are From Venus by John Gray.
And there are stereotypes, such as women being more emotional than men, or men having better spatial awareness.
But Dr Hyde, writing in American Psychologist, says her review of 46 meta-analyses conducted over the last 20 years, shows men and women are alike in the majority of areas.
The studies looked at cognitive abilities, verbal and nonverbal communication, social or psychological traits like aggression or leadership, psychological well-being like self-esteem.
Dr Hyde said gender differences accounted for either no or a very small effect for most of the psychological variables examined.