Studies have shown that collaborative quizzes can: 

• help with anxiety, improve self-confidence, and discourage cheating; 
• improve student motivation and class preparation;
• help with buy-in for other group learning activities in the curriculum;
• promote reflective thinking and retention;
• improve scores slightly for all students, not just those who perform poorly on individual quizzes; and
• improve mutual trust among students in a course, which contributes to the learning atmosphere and encourages students to attend and participate.