Participants viewed 50 negative, 50 positive, and 50 neutral images from the International Affective Picture System (IAPS; Lang et al., 2008). For each image, participants were asked if they would “Approach” or “Back away” from the scene depicted in the image. Physiology and event data provided with this toolbox correspond to the data from these presentations and judgments. Respiration, electrodermal, and electrocardiogram data were collected.
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sync summary event # 1 StartRecording
- physiology recording begins—note: the first instance of this marks the very beginning of the recording, the remainder of the time this event is listed is erroneous and occurred during various rest periods for participants.
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sync summary event # 2 StartBaseline3min
- corresponds to the onset of one baseline period lasting 3 minutes (first instance is the real 3min baseline) at the very beginning of the experiment.
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sync summary event # 3 StartBaseline2min
- corresponds to the onset of one baseline period lasting 2 minutes (first instance is the real 2min baseline) at the very beginning of the experiment
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sync summary event # 4 EndBaseline2min
- corresponds to the end of the baseline period (first instance is the real end of the 2min baseline) at the very beginning of the experiment
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sync summary event # 5 FixationOnset
- corresponds to any “+” display
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sync summary event # 6 StartPreClipBase
- correspond to practice trials at the beginning of the experiment
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sync summary event #7 neg
- 50, 3-sec trials that correspond to 50 different negatively valenced IAPS images
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sync summary event #8 neut
- 50, 3-sec trials that correspond to 50 different neutral valence IAPS images
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sync summary event #9 pos
- 50, 3-sec trials that correspond to 50 different positively valenced IAPS images