Approximately 65% of secondary school students report experiencing midday fatigue, leading researchers to explore lifestyle habits that could mitigate cognitive decline throughout the school day. One potential area of interest is 'active commuting'—the practice of traveling to school via physical means (such as walking, cycling, or scootering). Psychologists want to investigate this further using a self-report survey to examine the relationship between a student's level of active commuting and their subjective experience of afternoon cognitive focus.
Suggest two variables that could be correlated in this study to investigate the relationship between active commuting and afternoon cognitive focus.