In sample 2, the procedure and materials for the TNT task in Levy and Anderson (2012) were followed as closely as possible. Notable differences with Experiment 1:
- We used a drop-off TNT task. In a drop-off phase, cue words that were correctly responded to were dropped from the list. Cue words that were not correct, were randomly presented until reaching criterion (i.e., 100% recall).
- A different word list was used than in sample 1 (inspired by Levy and Anderson's (2012) list, but adapted for a Dutch sample. The criterium was that words within pairs should be weakly related, but that cues and targest should be unrelated to the other words in the list.
- Three sets of 12 word pairs were rotated across 3 versions of the task (A,B,C).
- A diganostic questionnaire was administered during a warm-up TNT phase, and a TNT Questionnaire was administered after the recall tests. All questionnaires were translated from Levy and Anderson (2012).
The instructions are in Dutch. The task was run in Eprime version 2.
The general aim of this experiment was to replicate the basic suppression effect using the drop-off TNT (Levy & Anderson, 2012) and to explore its association with individual difference measures in attentional control (Attentional Control Scale, ACS) and suppression ability (White Bear Suppression Inverntory, WBSI).
The Beck Depression Inventory, Second edition (BDI-II) was also administered. This questionnaire is not included here because of copyright issues.
**Reference**
Levy, B. J., & Anderson, M. C. (2012). Purging of Memories from Conscious Awareness Tracked in the Human Brain. Journal of Neuroscience, 32(47), 16785–16794. https://doi.org/10.1523/JNEUROSCI.2640-12.2012