Halpern Critical Thinking Assessment
The Halpern Critical Thinking Assessment[1] (also known as "that water bottle meme you see from time to time") can be described as a test that enables a content-representative assessment of recognition and recall aspects of critical thinking.
But, chances are that when you actually see the image, it is somebody trying to troll women. How this is done is by simply revealing the results of the test itself.
Females disproportionately give the wrong answer to this puzzle. In their efforts to level the results, researchers tried using photos instead of schematics, using a container with rounded sides so there will be less interference with a horizontal water line, having the water lines pre-drawn and just asking the participants which line looked correct, and just generally making it easier and easier. It didn't matter: after decades of variations to the puzzle, a significantly higher proportion of female adults and adolescents still draw a slanting line. 