🧠 心理旋转Mental Rotation
在线心理旋转测试：左右各有一个由方块组成的图形，判断右边是左边旋转后的同一个图形，还是它的镜像。经典的空间想象力训练，每次 20 题，统计正确率和平均反应时间。简单难度只转 90° 的倍数，中等加入 45°，困难每 30° 一档且方块更多。Mental Rotation test online: two block shapes are shown — decide whether the right one is the left one turned around, or its mirror image. A classic spatial-reasoning exercise: 20 trials per test with accuracy and mean reaction time. Easy rotates in 90° steps, Normal adds 45° turns, and Hard uses 30° steps with more blocks.
又快又准：键盘 ← / F 表示相同，→ / J 表示镜像。Be quick and accurate: ← or F for same, → or J for mirror.
玩法说明与常见问题How to play & FAQ
「心理旋转」怎么玩？How do I play Mental Rotation?
在脑海里把右边的图形转回和左边一样的方向，看两者能否完全重合。如果必须“翻面”才能重合，就是镜像。图形都经过挑选，镜像无法通过旋转得到，所以每题只有一个正确答案。得分综合正确率和平均反应时间。Mentally turn the right shape back to the left one's orientation and see whether they match. If you would have to flip it over, it is a mirror image. Shapes are chosen so a mirror image can never be produced by rotation alone, so each trial has exactly one right answer. The score combines accuracy and mean reaction time.
反应时间怎么算？How is reaction time measured?
从图形出现到你按下按钮的时间，只统计答对的题目。From the moment the shapes appear until you answer, counting only correct trials.
旋转角度越大越难吗？Are bigger angles harder?
研究发现，判断所需时间通常随旋转角度增大而变长，你可以在结果里感受一下。Studies find that response time usually grows with the angle of rotation — see if you notice it too.
「心理旋转」免费吗？需要下载吗？Is Mental Rotation free? Do I need to download anything?
完全免费，无需注册、下载或安装，打开网页就能玩，手机、平板和电脑都支持；游戏完全在你的浏览器本地运行，不会上传任何数据。It is completely free with no sign-up, download or install — just open the page on a phone, tablet or computer. The game runs entirely in your browser and nothing is uploaded.