That graph doesn&#x27;t look to me like something characterized by prejudice at all. Why would people suddenly become sexist in the computer technology field only, practically overnight?<p>The article even suggests that the drop started with the boom of the personal computer. That is not inconsistent with the hypothesis that women do better in formal settings, since that inflection point is essentially the moment it became possible for large amounts of people to teach themselves to be a computer programmer. It seems likely that some pre existing bias (either in interest our ability from girls or more likely an interplay of interest and culture) was just amplified when the flood of autodidacts joined the field, not that everyone decided to exclude women just as the field was getting hot.