How much does cognitive bias change people's perception? Well, the history of computing would be a lot different.
How much does cognitive bias change people's perception? Well, the history of computing would be a lot different. And so would many major orchestras, who had to implement a curtain during auditions so that judges and orchestral directors could only judge musicians on their skills... and not their gender. Michael Li, PhD, is the founder of The Data Incubator, an education startup training STEM PhDs to be data scientists and quants.
When we don't know the reasons behind our choices, we confabulate.
In a now classic experiment, the psychologists Richard E Nisbett and Timothy Wilson at the University of Michigan laid out a range of items, such as pairs of stockings, and asked people to select one. Participants consistently preferred the items on their most right-hand side. But when they were asked to explain their choices, they did not mention the position of the items, and instead attributed their choices to the superior texture or colour of the chosen pair of stockings, even when the displayed pairs were all identical. People confabulated. Not knowing some of the factors that were determining their choices, they produced an explanation that was not based on evidence relevant to the factors determining their choices, but mentioned instead plausible reasons why the chosen item was better.
One day in 1995, a large, heavy middle-aged man robbed two Pittsburgh banks in broad daylight. He didn’t wear a mask or any sort of disguise. And he smiled at surveillance cameras before walking out of each bank. Later that night, police arrested a surprised McArthur Wheeler. When they showed him the surveillance tapes, Wheeler stared in disbelief. ‘But I wore the juice,’ he mumbled. Apparently, Wheeler thought that rubbing lemon juice on his skin would render him invisible to videotape cameras. After all, lemon juice is used as invisible ink so, as long as he didn’t come near a heat source, he should have been completely invisible.
80% of adults are overly optimistic about life—where does that cognitive bias come from?
There's one brain bias that affects 80% of adults and it has a familiar name you may not expect: optimism. Not always thought of as a cognitive mechanism, the optimism bias leads people to overestimate the likelihood of positive outcomes and to underestimate the likelihood of negative outcomes. It can be hugely helpful in our social lives and in keeping us motivated even if the trade off is, at times, the denial of reality. So where does this cognitive bias come from? Are we born with it, or do we develop it as we grow? Developmental psychologist Lori Markson compiles research about how optimism works in babies and young kids, and how that may help us to understand why we adults are the way we are. This video was filmed at the Los Angeles Hope Festival, a collaboration between Big Think and Hope & Optimism.
Natural selection has left us with a world of optimists—is this healthy?
Think you’re not an optimist? Neuroscience begs to differ. Dr. Tali Sharot explains that 80% of people globally present with the optimism bias—even if they describe themselves as pessimists or realists. In a nutshell, the optimism bias is the tendency to think that the future will be better than the past or present, and to underestimate negative experiences, and overestimate positive ones. This is neither a good nor bad thing, but rather it's both: we evolved to be optimistic because our primordial ancestors needed to think that there was something better out there, beyond the cave, in order to survive, migrate, and evolve. Optimism is a powerful motivator and has proven health benefits, but it also has downsides. Here, Sharot explains that delicate balance, and how understanding the nature of our cognitive biases can help us better protect ourselves against failure.