大家好 因为课程需要我安装了psychtoolbox
基本上安装的过程是顺利的
安装完后，我打 DotDemo 想要测试psychtoolbox能不能正常运作
结果它有跳出 psychtoolbox 的logo 但是没有动画出现
Command Window 上面显示：
PTB-INFO: Retina display. Enabling panel fitter for scaled Retina compatibility mode.
PTB-INFO: This is Psychtoolbox-3 for Apple OS X, under Matlab 64-Bit (Version 3.0.12 - Build date: Oct 26 2015).
PTB-INFO: Support status on this operating system release: OSX version 10.10 is not supported or tested anymore.
PTB-INFO: Type 'PsychtoolboxVersion' for more detailed version information.
PTB-INFO: Most parts of the Psychtoolbox distribution are licensed to you under terms of the MIT License, with
PTB-INFO: some restrictions. See file 'License.txt' in the Psychtoolbox root folder for the exact licensing conditions.
PTB-INFO: Always using Cocoa for fullscreen windows to work around graphics driver bugs in OSX.
PTB-INFO: Presentation timing precision is not yet known for this configuration on most machines. Check your results.
PTB-INFO: OpenGL-Renderer is Intel :: Intel(R) Iris(TM) Graphics 6100 :: 2.1 INTEL-10.6.33
PTB-INFO: Renderer has 1536 MB of VRAM and a maximum 1536 MB of texture memory.
PTB-INFO: VBL startline = 1600 , VBL Endline = -1
PTB-INFO: Beamposition queries unsupported or defective on this system. Using basic timestamping as fallback: Timestamps returned by Screen('Flip') will be less robust and accurate.
PTB-INFO: Measured monitor refresh interval from VBLsync = 16.700529 ms [59.878344 Hz]. (237 valid samples taken, stddev=0.989355 ms.)
PTB-INFO: Small deviations between reported values are normal and no reason to worry.
WARNING: Couldn't compute a reliable estimate of monitor refresh interval! Trouble with VBL syncing?!?

这是非常常见的问题 你把错误那边几行贴去 Google 就有解答了

之前遇到过 网络上的方法试了一轮还是没用最后就把Screen('Preference', 'SkipSyncTests', 1);这行贴在前面了 他好像说时间会不准 但我试似乎还好

我会出现警示符合，然后就可以了，谢谢