Measuring shared knowledge with group false memory

Abstract

We conducted two experiments to investigate the effects of word list consistency and group collaboration on false memory. Using the DRM (Deese-Roediger-McDermott) paradigm, the first experiment (n = 121) examined false memory in a group; participants collaborated to select keywords using a between-subject condition of a consistent or randomized word list. The proportion of false responses was larger than that of error responses, especially for the consistent word list condition (p < 0.001), and group collaboration increased false recognition for both word lists (p < 0.001). Using an applied within-subject word list condition, the second experiment (n = 119) confirmed the results of Experiment 1. Furthermore, individual differences Euclidean distance model analysis revealed a difference in the shared cognitive dimension related to group false memory.

Applying Text Analysis to Evaluate the Common Knowledge Effect on Discussion Processes

“…Simple knowledge structures have access to the maximum storage capacity; however, the more complex they become, the lower the storage capacity. Arima et al (2018) showed that false memories increase when they share a knowledge structure. However, the discussion task in the experiment involved the collaborative recognition of a random list of words; it was not a natural group discussion.…”