16-17 Years 18-19 Years 20-24 Years 20s Academic Adult Adults African African Descent African Ethnicity Ambivalence Ambivalent Apparel Asian Asian Ethnicity Asiatic Attending Attentive Background People Black People Black Person Blur Blurred Bored Boredom Boring Casual Clothes Casual Clothing Caucasian appearance Class Class Room Class Rooms Classes Classmate Classmates Classroom Classrooms Clothes Clothing College Color Color Image Color Images Colour Colour Image Colour Images Concentrate Concentrating Concentration Day Days Daytime Desk Desks Differential Focus Disinterest Disinterested Eastern Ethnicity Educating Education Educational Emotion Emotions Female Females Five People Focus Focused Front View Front Views Frontal View Frontal Views Further Education Half Length Half-length Hear Hearing Horizontal Indifference Indifferent Indoor Indoors Inside Interior Late Teens Learn Learning Lecture Lecture theatre Listen Listener Listeners Listening Listens Male Males Man Men Mid Teen Mid Teens Multi Ethnic Group Multi Racial Group Pakistani Ethnicity Paying Attention People People in the Background Person School Schools Selective Focus Student Students Teen Teen Boy Teen Boys Teenage Boy Teenage Boys Teenager Teenagers Teens Twenties Unaffected Unenthusiastic Unmotivated Waist Up Woman Women Young Young Adult Young Adult Men Young Adult Women Young Adults Young Man Young Men Young Woman Young Women Youth