Researchers suggest a likely explanation for collaborative is that, when recalling items together, the retrieval strategies used by individual members of the group disrupt those used by others.

Collaborative inhibition.

Explanation:

As the exercise suggests, collaborative inhibition happens when, for example, recalling items together, the retrieval strategies used by individual members of the group disrupt those used by others. Therefore, this phenomenon happens when a group of individuals who are together remember less information than the same quantity of individuals would remember if they worked alone. For example, if a group of 4 students had to remember the assigment in full detail, if collaborative inhibition happens, they would disrupt the information among themselves making the same 4 students, separated, more capable of remembering the information.