Why individuals work less hard in a group

HostWe have all been there, whether it's a group project in school or a big team at work, where it feels like some people just aren't pulling their weight. It's easy to get annoyed and think people are just being lazy, but there might be something deeper going on with how our brains handle working together.

GuestIt's funny you mention pulling weight, because that's exactly how we first learned about this. Back in 1913, there was a French engineer named Max Ringelmann who wanted to see how much work people could actually do. He set up a very simple test where he had men pull on a rope as hard as they could. He measured how much force they used when they were all by themselves, and then he started putting them into groups to see what would happen.

HostI assume if you have two people, you get twice the power on the rope?

GuestThat's what you would think, but the numbers told a different story. If one man could pull a hundred units of weight on his own, you would expect two men to pull two hundred. Instead, they only pulled about 186. They lost a chunk of their power just by being a pair. And as the group got bigger, the individual effort just kept dropping. By the time Ringelmann had eight people on the rope, those men were each only pulling about half as hard as they did when they were alone. He realized that as a team grows, the amount of work each person puts in slowly but surely goes down.

HostThat's a huge drop. Is it just that they can't find enough space on the rope, or is it that they're actually slacking off?

GuestWell, it's actually both. Ringelmann found two main reasons for this. The first one is a timing problem. Think about how hard it's to get a group of people to do anything at the exact same time. On a rope, if I pull my hardest at one second and you pull your hardest a second later, we never hit that peak power together. Our efforts clash or overlap in a way that's just not efficient. It's a logistics issue where the physical act of working together gets messy.

HostThat makes sense, but timing can only account for so much. There has to be something else making them pull with only half their strength.

GuestYou're right. The second reason is a mental one, and it's often called social loafing. This is the tendency for our brains to lean back when we feel like the responsibility for the job is spread out across a whole crowd. When you're the only one on that rope, you know that if the rope doesn't move, it's 100 percent on you. But when you're one of ten people, your brain starts doing this quick math. It decides that your small part of the work doesn't matter quite as much. So, without you even realizing it, your brain throttles your energy to save it for later.

HostI have to push back a bit there because if I'm on a team, I know I'm trying my best. I would feel like a jerk if I was caught slacking. Are you saying these people are lying about how hard they're working?

GuestThat's the most startling part of the whole thing. A few decades later, a researcher named Alan Ingham took this even further. He had people put on blindfolds and told them they were pulling the rope with a whole team behind them. But in reality, they were pulling all alone. Even though they were the only ones on the rope, they still pulled with much less force because they believed other people were helping. The kicker is that when the researchers asked them afterward, the participants truly believed they had given it their absolute all. They weren't faking it.

HostSo their bodies were holding back even though their minds thought they were flat out?

GuestExactly. It happens because when everyone is pulling one rope, you lose the link between your own muscle burn and the result. In a solo pull, you see the rope move when you pull. In a group, you can't tell which bit of movement is yours. Without that clear feedback loop, the inner mind lowers the ceiling on how much effort it'll let you use. It happens deep down, so your conscious mind never even gets the memo that you're coasting.

HostIt feels like a losing battle, then. If our brains are wired to coast the moment we join a team, how does any big project ever get finished at full speed?

GuestIt turns out there's a cure, and it's actually pretty simple. This whole slacking effect is a response to feeling like you're just an anonymous face in a crowd. When researchers told teams that their individual force was being tracked by a sensor on the rope, the slacking vanished. Even if they were still in a big group, the moment they felt like their specific effort was being seen and measured, they jumped back up to their full power.

HostSo the secret is just making sure everyone knows they're being watched?

GuestNot just watched in a bad way, but felt. People need to feel like their specific part is essential and visible to the final goal. If you want a team to pull at full strength, you have to break the task down so that no one can get lost in the middle.

HostThe rope only moves fast when every person knows their own grip is being counted.

GuestThat sensor on the rope changes everything because it reminds the brain that there's nowhere to hide.

HostThe men in the original study thought they were doing their best, but they only found their real strength when they were the only ones left holding the line.