Single-Sex School Girls Outperform Girls Attending a Co-Educative School in Mental Rotation Accuracy

Do girls attending a single-sex school outperform their same-sex counterparts attending co-educative schools when solving a mental rotation task known to produce substantial gender differences favoring males? In total, 252 German pupils (126 8th/12th graders each) attending single-sex (84 girls) or co-educative (84 boys and girls each) high-schools in North-Rhine Westphalia (west Germany) participated. All pupils completed the ??Mental Rotations Test?? (MRT). We found that in grade 12 girls attending a single-sex school outperformed their same-sex counterparts attending co-educational schools. In grade eight no differences between both groups were observed. As expected, the well known gender difference between 12th grade boys and co-educative girls had been found. Expectations as well as possible consequences are discussed.