Social loafing has been found to be especially noticeable among

men in cultures that value individualism

Explanation:

Social loafing refers to the tendencies for people to make less effort if they are working on group setting compared to when they are working in individual setting.

People from cultures that value individualism, tend to want only to focus on their own work in order to achieve as much as plosive recognition as possible. Because of this, working in group setting provide less incentives for the,. This make social loafing among people in cultures that value individualism become more noticeable.