Final answer:
True, teamwork creates synergy wherein the combined effect is greater than individual efforts, leading to a team halo effect where teams appear more effective than they may be. Ineffective teams may suffer from social loafing and poor communication.
Step-by-step explanation:
Teamwork creates a synergy, which is true; the combined effect of individual efforts is indeed greater than their individual efforts alone. This synergy often contributes to various benefits within a team setting, such as improved problem-solving capabilities and increased creativity, which can lead to a phenomenon known as the team halo effect.
The team halo effect can create a perception that teams are working better than they actually are because collective success can overshadow individual underperformance. Therefore, the correct answer to the question 'Which is one effect of the team halo effect?' would be (a) teams appear to work better than they do.
As for why some teams work well while others do not, several factors come into play. Successful teamwork can be hampered by social loafing, where individual team members reduce their effort and inefficiencies due to poor communication and misaligned goals. In contrast, high-functioning teams often have clear communication, aligned objectives, and a strong team dynamic that leverages the strengths of each member.