Knowledge Base

Visualize Your Stimulus, Participant Videos And Line Chart

Aim

To display the stimulus video to play it back together with the recorded video of the test participant's face and a Line Chart with the data.

Prerequisites

• Your license includes the Project Analysis Module.
• Your project contains video or camera analyses and one or more stimuli.

Procedure

1. Open the Project Analysis section and click Stimulus.
2. Select the stimulus that you want to display and click OK. The stimulus video will open.

Not all videos supported by FaceReader can directly be shown in the Project Analysis Module. They might require conversion first.

3. Click Participant and select the appropriate participant and analysis to display the corresponding video. Then click OK. The participant video will open next to the stimulus video.

The participant video window contains three icons, one to switch the sound on and off, one to display the video full screen and one to move the video from the video window and display it as a picture-in-picture.

The participant video displayed above is from the 'FaceReader sample project - Two stimuli'. In this project the test participants watched two stimulus videos, 'Twins Eating' and 'Frying insects'.

You can display a Line Chart together with the stimulus video and the participant video and play back the videos in sync. A hairline in the Line Chart shows the position in the videos.

Compare Data

Aim

To compare two or more data sets in a chart or table and carry out a t-test to test for significant differences.

Prerequisites

• Your license includes the Project Analysis Module.
• Your project contains video or camera analyses.

Procedure

Select Data

1. Open the Project Analysis section and click Compare.
2. Click Add Data Selection.
3. If your project contains stimuli or events markers — Select a stimulus/event marker to compare data sets for this stimulus/event marker only.
4. Click Adjust Filter to choose what participants you want to include in the selection. You can base your selection on participant name, analysis name, participant/analysis combination, gender or age. Select, for instance, all the male subjects in your project. Click Update to add the filter to your selection. See Select Participants for more information.
5. Click OK. The Participant Filter is added to the Selection window. You can see how many test participants have been selected.
6. Click Add Data Selection to select a second data selection.
7. Click Adjust Filter and select the second set of data. Select, for instance, all female subjects in your project. Click Update and then OK.
8. Repeat steps 6 and 7 to add more data sets to the comparison in case you have more than two participant groups.
9. Select whether you want to compare the two data sets in a Bar Chart, Table, Correlation Table or Line Chart or visualize Insights.
10. Select the parameters you want to visualize/tabulate. Then click OK.
11. Select the advanced options of your choice. Then click OK. See Advanced Options For Data Analysis for more information.

Tip: You can change the color of the selected data. Click on the colored bar in front of the data set and pick the color you like.

Add All Participants As A Separate Selection

Select this option to compare the data of all the participants in your project.

1. Open the Project Analysis section and click Compare.
2. Click Add All Participants As A Separate Selection. A list with all the participants in your project will appear as a separate data selection.

Source: FaceReader 10 Reference Manual (Help), Noldus Information Technology