Several studies found the most prevalent motivational origins of social loafing to be the lack of an understanding of individual contributions, unchallenging tasks given to the individual, low personal satisfaction from the task, and lack of a united group. Theories investigating why social loafing occurs range from group members' feeling that their contributions will not be noticed to group members' realizing their efforts are not necessary. In a work setting, most managers agree if a task is new or complex employees should work alone. While tasks that are well known and have room for individual effort are better when done in groups.