You may think you're pretty popular with more than 500 Facebook friends but don't kid yourself, says a new study. You still have only about five friends in real life.
Many of us have contact lists and followers on social media networks that extend into the thousands, but research conducted by Kiwi Dr Michael Harre suggests we could count our real friends on one hand.
The research, conducted at the University of Sydney, where Dr Harre is based, found humans have the capacity to let only a small number of people fully into their inner circle. That number could be as small as five.
Harre believes this upper limit has likely gone unchanged for hundreds of thousands of years and probably was how humans interacted when they lived as groups of hunters, in small groups.
"What our research showed for the first time is that complex layers of social groups are formed by adding one more person to our friends list," explained Dr Harre. "And much like the ripples in a pond after you throw in a stone, the strength of each connection diminishes or weakens as they expand.