The Passive Audiovisual Template in SennsLab
The Passive Audiovisual template is used to present video files, where the participant is not asked for any type of interaction. This template is most often used to evaluate commercials, trailers, corporate videos, movies, TV shows, etc.
The passive audiovisual template is a Standard template.
To set up a passive audiovisual test:
- In the "Materials" tab, choose the number of stimuli to be included in each class:
Familiarization: You can optionally add 1 video in order to accustom the participant to the context of the task. The familiarization video is not analyzed. SennsLab will automatically add 1 video for calibration purposes in all cases.
Target Stimuli: These are your actual target video files that will be fully analyzed. Add 1-10 videos.
Competition Stimuli: These are optional video files from competitors to your target stimuli, fully analyzed to allow comparison. Add 0-15 videos.
Category Stimuli: These are additional "noise" video files within the same product type. They are primarily added to disguise which videos are the intended targets of the study. 0-40 videos can be added. These are not analyzed.
- Load the images into the viewer
On the right side of the screen, under each specific category, click on the icon to add video files. You can also preview with the icon, and delete with the icon.
To add multiple video files at once, use the "add several" button in the upper-right.
- Set randomization preferences
Video files can be presented in randomized order by checking "Randomized". This is intended to break up any unintentional emotional biases from one video to the next.
If you prefer to maintain precise control of video order, choose "Sequence". Click the button to create a customized order.
- Create Intervals of Interest (IOI)
An Interval of Interest is an optional design tool that allows you to define a segment of a video for statistical comparison with other segments within the video, or similar segments in other target videos. IOI work somewhat like areas of interest (AOI), except that they are defined by time rather than area and are used over dynamic stimuli like videos.
For more information about creating IOI, see Guide to Intervals of Interest.
Some important considerations when using the passive audiovisual template:
- When there are 1 or 2 stimuli events, the total test duration allowed is 150 minutes (two and a half hours).
- When there are 3 or more stimuli events, the maximum total test time allowed is limited to 35 minutes.
- Acceptable video formats are: .avi, .mpeg, .mpg, .wmv and mp4. The video must be playable on the computer you are using for stimulus presentation (and this could depend on the codec used to create the video). If there is an error when importing a specific video, we recommend converting to .avi format before importing.
For an explanation of the general test sequence and execution, see Understanding Experiment Structure in SennsLab
For more information about the built-in calibration in this experiment template, see SennsLab Emotional-Cognitive Calibration