Australian psychometric aptitude and skills tests | Right People

STI Shift Work Suitability Indicator

The STI-LOCI is a well-researched 38 item self-report measure that examines peak performance at work. Three subscales help identify those individuals who may not be suited to jobs that involve shiftwork or irregular sleep patterns.

The construction of the STI-LOCI is based on a broad three-dimensional model of circadian typology encompassing the scales of Morningness, Eveningness and Sleep Debt Propensity. Results can be represented as a quadrant-based model (see Figure below), describing individuals as being early to bed early to rise, late to bed late to rise, early to bed late to rise (lethargic types) or late to bed early to rise (energetic types).













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