In aspects of a wearable article for determining a task, a system includes a delivery device usable to administer a liquid responsive to an applied force, and includes a wearable article with multiple sensors to detect movements of the wearable article and handling of the delivery device. A task determination module is implemented to receive sensor data identifying the movements of the wearable article and the applied force, and can determine a task from a set of tasks associated with the delivery device that corresponds to the movements of the wearable article. The task determination module can then determine whether the task was performed correctly based on a comparison of the sensor data to a correct pattern of use for the task.