When did social psychology become an empirical science? refer to Plato, Triplett & Ringelmann.
social psychology came about around the late 19th century when there was increased interest into the effect of social influences on thoughts and behavior. Philosophers like Plato highlighted the impact of other people influencing the behavior of others. He came up with the concept of "crowd mind" which is also referred to as mob mentality. even the most wisest, even tempered of people can become irrational mobs when put in a crown situation.
Norman Triplett (1898)- investigated the influence of the presence of others on behavior. He found that when schoolchildren were asked to wind up fishing wire as fast as possible, performance was better in the presence of others compared to doing the task alone.
Contradicts Ringelmann (1880)- he found that when people worked together to push a cart and pull a rope, people put in less effort than when they worked alone.