/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/ 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/PsychHardware/PR670Toolbox/PR670close.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670config.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670getserialnumber.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670getsyncfreq.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670init.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670measspd.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670measxyz.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670parsespdstr.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670rawspd.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670rawxyz.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670read.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670set.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670setsyncfreq.m
/usr/share/psychtoolbox-3/PsychHardware/PR670Toolbox/PR670write.m