/usr/share/psychtoolbox-3/PsychRects/ 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/PsychRects/AdjoinRect.m
/usr/share/psychtoolbox-3/PsychRects/AlignRect.m
/usr/share/psychtoolbox-3/PsychRects/ArrangeRects.m
/usr/share/psychtoolbox-3/PsychRects/CenterRect.m
/usr/share/psychtoolbox-3/PsychRects/CenterRectOnPoint.m
/usr/share/psychtoolbox-3/PsychRects/CenterRectOnPointd.m
/usr/share/psychtoolbox-3/PsychRects/ClipRect.m
/usr/share/psychtoolbox-3/PsychRects/Contents.m
/usr/share/psychtoolbox-3/PsychRects/GrowRect.m
/usr/share/psychtoolbox-3/PsychRects/InsetRect.m
/usr/share/psychtoolbox-3/PsychRects/IsEmptyRect.m
/usr/share/psychtoolbox-3/PsychRects/IsInRect.m
/usr/share/psychtoolbox-3/PsychRects/OffsetRect.m
/usr/share/psychtoolbox-3/PsychRects/RectBottom.m
/usr/share/psychtoolbox-3/PsychRects/RectCenter.m
/usr/share/psychtoolbox-3/PsychRects/RectCenterd.m
/usr/share/psychtoolbox-3/PsychRects/RectHeight.m
/usr/share/psychtoolbox-3/PsychRects/RectLeft.m
/usr/share/psychtoolbox-3/PsychRects/RectOfMatrix.m
/usr/share/psychtoolbox-3/PsychRects/RectRight.m
/usr/share/psychtoolbox-3/PsychRects/RectSize.m
/usr/share/psychtoolbox-3/PsychRects/RectTop.m
/usr/share/psychtoolbox-3/PsychRects/RectWidth.m
/usr/share/psychtoolbox-3/PsychRects/ScaleRect.m
/usr/share/psychtoolbox-3/PsychRects/SetRect.m
/usr/share/psychtoolbox-3/PsychRects/SizeOfRect.m
/usr/share/psychtoolbox-3/PsychRects/UnionRect.m