Mood rating and mood induction instructions, as well as the music used in the study, can be found online <a href="http://www2.psych.ubc.ca/~ennslab/Vision_Lab/Mood_Induction_Procedures.html">here.</a> **A note from Dr. Jefferies:** "With regards to the music used in the induction procedure, I have a couple of corrections that might be relevant: - Schumann – Traumerei (from Kinderszenen) - Vivaldi, Four Seasons, Concerto 1: Summer (not Spring) Presto - Vivaldi, Four Seasons, Autumn, Adagio Molto - Hungarian dances – I believe the following were the ones used: No 1 in C, Presto; No 3 in A flat; No 7 in C minor" "I thought you might also want the font type and size for the AB task: Fixation Cross: Times New Roman, 28 Digits & Letters: Courier, 33 Just as a note, the AB can vary considerably depending on the SOA, whether there is a blank ISI between sequential items in the stream, and whether the stimuli are black-on-white or white-on-black." **A note from Dr. Enns:** "We took a great deal of care to place participants into a quiet, peaceful environment, involving a cocoon like easy chair and head phones to get them into the respective moods, using the music and the method-acting instructions. We also tracked their mood (using the mood grid) quite extensively so we could see if participants were not conforming to group norms. Finally, our final classification of the participants into the four grids was based on their self-reported valence and arousal scores, not on their originally assigned conditions, though this involved only a few participants." In response to our questions about the experiment: 1. Are the participants moved during the experiments? No, they are not moved. 2. Was a head support to ensure equal distance to the screen? There was no head support. 3. Are all the instructions spoken, or are some instructions also presented on the screen? All instructions were spoken. **A note from Dr. Eich:** "The cocoon chair was from my lab but it bit the dust years ago. Importantly, we continued have success using music to induce moods when Ps were seater in a more conventional lounge chair (with ottoman) and with music piped in through floor-based stereo speakers (instead of headphones). The replicators should do likewise, and it's also very important that Ps be tested individually. The points you raised are also right on the money: the investigators should have Ps self-report their mood (via the two-dimensional [valence x arousal] mood grid) repeatedly (every 5 min) until the reach a predetermined critical state (e.g, calm, happy, etc.). It's also critical to have Ps rate their mood (again on the mood grid) immediately AFTER the cognitive task, to ensure that the induced mood was still in effect during task performance. For ethical reasons, we always kept negative-mood (sad or anxious) Ps in the lab until they felt at least "neutral": playing sprightly blues or R&R helped, especially if Ps are given chocolate cookies to munch on!"