/usr/share/psychtoolbox-3/Psychometric/ is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/psychtoolbox-3/Psychometric/AreaUnderROC.m
/usr/share/psychtoolbox-3/Psychometric/ComputeLogistic.m
/usr/share/psychtoolbox-3/Psychometric/ComputeNakaRushton.m
/usr/share/psychtoolbox-3/Psychometric/ComputeOptimalBeta.m
/usr/share/psychtoolbox-3/Psychometric/ComputeWeibTAFC.m
/usr/share/psychtoolbox-3/Psychometric/ComputeWeibYN.m
/usr/share/psychtoolbox-3/Psychometric/Contents.m
/usr/share/psychtoolbox-3/Psychometric/CumNormYNFitFun.m
/usr/share/psychtoolbox-3/Psychometric/DbToLog.m
/usr/share/psychtoolbox-3/Psychometric/FindAlphaWeibTAFC.m
/usr/share/psychtoolbox-3/Psychometric/FindEpsWeibTAFC.m
/usr/share/psychtoolbox-3/Psychometric/FindThreshWeibTAFC.m
/usr/share/psychtoolbox-3/Psychometric/FindThreshWeibYN.m
/usr/share/psychtoolbox-3/Psychometric/FitCumNormYN.m
/usr/share/psychtoolbox-3/Psychometric/FitLogistic.m
/usr/share/psychtoolbox-3/Psychometric/FitLogitYN.m
/usr/share/psychtoolbox-3/Psychometric/FitNakaRushton.m
/usr/share/psychtoolbox-3/Psychometric/FitNakaRushtonFun.m
/usr/share/psychtoolbox-3/Psychometric/FitWeibAlphTAFC.m
/usr/share/psychtoolbox-3/Psychometric/FitWeibTAFC.m
/usr/share/psychtoolbox-3/Psychometric/FitWeibYN.m
/usr/share/psychtoolbox-3/Psychometric/GiveFeedback.m
/usr/share/psychtoolbox-3/Psychometric/InvertLogistic.m
/usr/share/psychtoolbox-3/Psychometric/LogToDb.m
/usr/share/psychtoolbox-3/Psychometric/NormLikelyRatio.m
/usr/share/psychtoolbox-3/Psychometric/NormLogLikelyRatio.m
/usr/share/psychtoolbox-3/Psychometric/NormalROC.m
/usr/share/psychtoolbox-3/Psychometric/SimWeibTAFCObs.m
/usr/share/psychtoolbox-3/Psychometric/WeibAlphTAFCFitFun.m
/usr/share/psychtoolbox-3/Psychometric/WeibTAFCFitFun.m
/usr/share/psychtoolbox-3/Psychometric/WeibYNFitFun.m