Fig. 4

External retrieval during choice block. Note. Some participants without advice nearly exclusively relied on external retrieval (a). A trial was defined as solved with the external retrieval strategy if the mouse had been hovered on top of the box and the correct solution had been revealed. In both advice groups, participants relied less on external retrieval over time (b). The decline was more pronounced in the iRS-else-eRS advice group than in the no advice group (Statistically, the decline was evident in two exploratory independent t-tests. Participants of the advice and the no advice group used the eRS similarly frequently throughout the first five trials M_advice = 50.1%_, M_{no advice} = 50.6%, t(96) = .06, p = .954, d = .01, CI95_d = [− .39 .39], but not during the last five trials, M_advice = 10.4%_, M_{no advice} = 30.4%, t(96) = 3.11, p = .002, d = .63, CI95_d = [.23 .98], of the choice block.). Each dot represents the average proportion of eRS at any given trial in the choice block. eRS = external retrieval strategy, iRS = internal retrieval strategy