THE PIZZA SLICE TEST (PST)

The Pizza Slice Test (PST) is a brief cognitive screening tool designed to evaluate visuospatial organization, planning, and sequencing using a familiar real-world concept. Developed as a practical alternative to the Clock Drawing Test (CDT), the PST addresses decreasing exposure to analog clocks, particularly among younger adults, while assessing similar underlying cognitive skills.

The PST involves dividing a circle into eight equal slices and numbering them in clockwise order. Performance is scored using a simple feature-based system that captures accuracy, organization, and visuospatial planning. The PST is intended to provide a quick and accessible measure of cognitive performance and is freely available to clinicians, students, and researchers to support ease of use and broad adoption.