Figure 1.

Percentage of images for either gender (female/male), for the “person” and “intelligent person” queries, by search engine. The four plots correspond to each of the analyzed search engines. The Y-axis shows the percentage of pictures obtained by the query terms (“person” and “intelligent person”) used to retrieve the results from the search engine that are indicated in the X-axis. The legend indicates the color, to distinguish between the pictures corresponding to female faces (black continuous line) or male faces (gray dashed line). Vertical lines crossing the data points indicate bootstrapped 95% confidence intervals. For example, in the left plot (Google), ~50% of pictures show female faces for the query term “person,” and ~50% show male faces. In the same plot, ~30% of pictures show female faces for the query term “intelligent person,” while ~70% of pictures show male faces.