Figure 1.

Task and experimental conditions. Shown are sample trials for each experimental condition (each row illustrates one of 3 conditions). Note that the same material (2 auditory objects) is presented at encoding (identical across conditions). Each object is presented for 1 s followed by an ISI of 1 s. Next, a number appears onscreen for 1 s, indicating which item in the sequence gets probed (here: 2 for 2nd item in the sequence). A final object is then presented and subjects have a maximum of 2 s to decide, whether the object or feature of interest is the same or different from the item tested (here: 2nd item). In the spectral condition (1st row) subjects only focus on the spectral feature (in purple). In the temporal condition (2nd row) subjects only focus on the temporal feature (in yellow). In object condition, they encode the object as a whole (both features in combination).