Provided is a display device capable of suppressing reduction in display quality even when pause drive is performed, while allowing the intensity of a light source to be changed in accordance with images to be displayed. An individual, rigid connector is provided that, in concert with conductive edge traces on selected printed circuit boards, provides power and signal coupling alternatives for various printed circuit boards. A particular message can be input to the predictive model, which can determine a probability of propagation of the message on the social network, such as how many connections may receive at least a portion of the message andor a likelihood of at least a portion of the message reaching respective connections in the social network. The system delivers tapered prompts in response to the determination of a quantity of at least one of the correct and incorrect responses.