The vast majority of experiments and studies show no sex difference, she adds. But they’re not the ones that get published. “I describe this as an iceberg. You get the bit above the water, which is the smallest but most visible part, because it’s easy to get studies published in this area. But then there’s this huge amount under the water where people haven’t found any differences,” Rippon explains. People end up seeing only the tip of the iceberg—the studies that reinforce sex differences.
