Eagly & Carli (1981):
META-ANALYSIS OF 145 STUDIES OF INFLUENCEABILITY THAT INCLUDED MORE THAN 21,000 PARTICIPANTS FOUND THAT, ON AVERAGE, MEN ARE LESS PRONE TO BEING INFLUENCED THAN WOMEN.
BUT THE SIZE OF THE DIFFERENCE WAS VERY SMALL.
ONLY SLIGHTLY MORE THAN HALF OF MEN ARE LESS INFLUENCEABLE THAN THE AVERAGE WOMAN.