Knowledge Base

Line Chart

A Line chart shows the values of your parameters over time, aggregated over the test participants you selected. The Line Chart below shows the custom expressions of the five test participants in the 'FaceReader sample project - Two stimuli'. The data that are taken into account are those of the time period when the test participants were watching the 'Twins eating' stimulus.

You can visualize a Line Chart together with the stimulus/event marker and one or more participant videos. If the stimulus is a video, you can play it back and a hairline in the Line Chart shows the position in the video.

Please note that a warning will appear if you select analyses of different length. This may happen in a project in which no stimuli were presented to the test participants. The Line chart will show data up to the duration of the shortest analysis.

A Line Chart has a number of two icons in the toolbar:

• Zoom Out and Zoom In — To zoom out and in on the timeline.

And the Y axis icon to access:

• Auto Range — To display a scale with a minimum and maximum value that fit your data.
• Full Range — To display a scale with a minimum of -1.00 and a maximum of +1.00. Use this scale to compare multiple charts, for instance, one chart for your female subjects and one for your male subjects.
• MIN and MAX — To set the minimum and maximum Y-value.

Heatmap

A heatmap shows the hotspots of the test participant's gaze overlay on a stimulus, indicating where the test participant looked the longest. On the time axis you can define an interval for which you want to see the heatmap.

Calculate Statistics And Summarize Them In A Table

Aim

To calculate statistics on the analyzed facial expressions and other parameters of all participants, participant groups or single participants.

Prerequisites

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

Procedure

1. Open the Project Analysis section and click Table.
2. Select the data you want to include in your analysis. See Data selection for more information. Click OK when you are ready. FaceReader will show a table with the results.

A table has the same information/icon in the toolbar as a chart. See Visualize Your Data In A Chart for more information.

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