Collaborative inhibition (CI) refers to a phenomenon that at the retrieval phase, learners recall less when working collaboratively in a group than working by themselves. Research on the mechanism of the phenomenon of CI is one of the most popular topics in psychology in recent years. However, previous studies took more attention on the influential factors from the retrieval phase, while studies explored the CI effect from the encoding phase were insufficient. On the basis of previous studies, we tried to explore the factors from the encoding phase that might have an effect on CI. From this point of view, it would provide evidence for the exploration of the mechanism of collective memory. Two experiments were used in our study. Experiment 1 asked participants to learn word lists under full or divided attention conditions, results of group performances would show whether the involvement of attention in the encoding phase have an influence on CI or not. Experiment 2 controlled the learning styles, with 8, 11, 14, 17, 20 years old of students as the participants, and explored the effect of learning styles on the phenomenon of CI among different ages of students. Results showed that: a) under the full attention condition, the phenomenon of CI showed up, while under the condition of divided attention did not, which indicated the involvement of attention in the encoding phase had an effect on CI. b) both under self-controlled and other-controlled conditions of learning styles, the participants of different ages showed a CI effect. For the age of 8, 11, 17, 20 students, CI effects were similarly between self-controlled and other-controlled conditions; while for the age of 14 students, the CI effect under self-controlled learning style was significantly higher than that of other-controlled learning style. The results of Experiment 2 indicated that the effect of learning styles on the phenomenon of CI was different among different ages of students. Results of our study supported the explanation of retrieval strategy disruption hypothesis of CI.