Barb is seeking new, innovative, novel ideas from her staff as they prepare for a new work process. as barb forms a task group to work on the new procedure brainstorming she knows she needs to place individuals on the task group who share different ideas so that she does not in the end realize she has formed a/an group with similarities and commonalities that may get in the way of the very innovation she is seeking

Interest group

Explanation:

Interest group is the collection of members that get together for sharing common concern, topic or subject for impacting the policy to work towards their own cause. They expect policy to benefit the interest group that have similar concept of thought.

According to the situation mentioned in question,Barb wants to form the task group so that she can receive different opinions and ideas from the members of the group on her novel rather than forming interest group with common share of thoughts which will not let her receive new ideas..