Gender differences research asks whether boys and girls perform differently on the same physical task. Reaction time measures how fast you respond to something unexpected. Testing equal groups of boys and girls on the same stick-catching task reveals whether one group grabs it sooner on average.

Reading emotions from facial expressions is one way boys and girls may differ. You compile 25 photos of different expressions into a test, then give it to 10 boys and 10 girls of the same age. Each participant has one hour to identify the emotion shown in each photo. When you score the results, girls averaged 72% correct while boys averaged 68.5% — a gap that suggests the two groups may read facial expressions with different accuracy.

Gender differences can be measured in creative tasks like drawing. Blind grading removes bias so the comparison stays fair. An art teacher scores all drawings without knowing each artist's gender, then the averages reveal whether males or females scored higher.

Whether boys and girls respond differently to peer pressure is a social behavior question as much as a scientific one. You set up a group of 10 people secretly told to choose an obviously incorrect response — then one real participant joins without knowing the plan. The group is shown simple shapes and asked to match two that are the same size. The planted members all pick the wrong pair first, putting pressure on the participant who answers next. Running this with 20 male and 20 female participants, then comparing how often each group follows the crowd, reveals whether peer influence shapes choices differently by gender.

Gender differences may extend to the senses, including smell. A blindfold test lets you compare how well males and females detect and identify different food items. Each person also rates how strong each smell is, adding a second measure beyond simple identification.