Four items measure how alive, spirited, and energised a person currently feels. Izadi, Rudd, and Patrick (2019) adapted the scale from Ryan and Frederick's (1997) seven-item subjective vitality measure, selecting items that best captured an energised affective state.
Izadi, A., Rudd, M., & Patrick, V. M. (2019). The way the wind blows: Direction of airflow energizes consumers and fuels creative engagement. Journal of Retailing, 95(4), 143–157.
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