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Are two heads usually better than one？If you had a difficult problem to
solve，would you be better working on the problem alone or working on it as S1.______
part of a group？Years of research has yielded a consistent pattern of findings
shows that groups typically produce more，and produce better solutions to S2.______
problems than the same number as individuals working alone.For instance，a S3.______
classic experiment by Shaw had groups or individual subjects attempted to S4.______
solve problems involving conceptual and mathematical skill.In every case，S5.______
the groups produced more correct solutions than the individuals.
However，it was one important warning to the finding of group superiority：S6.______
the groups were considerably less efficient，when time considered，than the S7.______
individuals were.In other words，although groups produced more correct solutions，
but they did so at a cost of more time.In fact，much subsequent S8.______
research has suggested that the advantage of groups in solving problems can be
outweighed unless efficiency in terms of time per person is a major criterion.S9.______
As a general rule，though，group performance in problem-solving situations is
more qualitatively and quantitatively superior to the performance of the average S10.______
individual working alone.There are a number of reasons groups are generally
better at problem solving than individuals.