Real-time estimation of user engagement level and other factors using sensors

An electronic device comprising:

• one or more processors;
• and
• memory storing one or more programs configured to executed by the one or more processors, the one or more programs including instructions for:
• obtaining ambient illuminance data corresponding to illuminance of ambient light in the vicinity of a person;
• obtaining display screen luminance data associated with a content luminance value of displayed media content and with display screen brightness;
• obtaining instantaneous pupil size data corresponding to a pupil size of one or more of the person's pupils;
• estimating, based at least in part on the ambient illuminance data and the display screen luminance data, a light-induced pupil dilation or constriction caused by the illuminance of ambient light and the luminance of a display screen being viewed by the person;
• and
• estimating the pupil dilation or constriction caused by at least one of engagement, arousal, or cognitive load experienced by the person based, at least in part, on the pupil size data and the light-induced pupil dilation or constriction.

A non-transitory computer-readable medium storing one or more programs configured to be executed by one or more processors of an electronic device, the one or more programs including instructions for:

• obtaining ambient illuminance data corresponding to illuminance of ambient light in the vicinity of a person;
• obtaining display screen luminance data associated with a content luminance value of displayed media content and with display screen brightness;
• obtaining instantaneous pupil size data corresponding to a pupil size of one or more of the person's pupils;
• estimating, based at least in part on the ambient illuminance data and the display screen luminance data, a light-induced pupil dilation or constriction caused by the illuminance of ambient light and the luminance of a display screen being viewed by the person;
• and
• estimating the pupil dilation or constriction caused by at least one of engagement, arousal, or cognitive load experienced by the person based, at least in part, on the pupil size data and the light-induced pupil dilation or constriction.