December 2, 2015 8:15 am Warning Signs of Dementia Dementia is described as a group of symptoms affecting memory, thinking and social abilities severely enough to interfere with daily functioning. US & World Videos 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 5:39 Billerica police sergeant hit and killed by excavator during construction detail 2:30 Arrests made in string of home break-ins targeting Asian-Americans 1:49 2 mail carriers targeted in Dorchester robberies 4:06 Students vote no confidence in Emerson president following protest arrests