A concept for monitoring a subject employs: a first sensor output signal representative of detected air pressure; and a second sensor output signal representative of a detected property of at least one of: the subject; and the environment. A dressing activity of the subject is determined based on the first sensor output signal and the second sensor output signal. Information about a dressing activity of the subject may, for example, be useful for the purpose of assessing the subject's physical and/or mental abilities.