Knowledge Base

Score Stimuli

Aim

To mark the time the Stimulus was shown to the test participant.

Prerequisites

• Your license includes the Project Analysis Module.
• You defined Stimuli. See Define Stimuli
• You have a video or camera analysis.

Procedure

To Score a Stimulus During an Analysis

• Automatically — Use The Stimulus Presentation Tool
• Manually — Press the trigger key that is associated with your Stimulus.

If you have the Timeline window open, a bar appears with the same length as the Stimulus duration that you chose when you created the Stimulus. You can press the Stimulus trigger key for each time the Stimulus starts.

To Score a Stimulus After an Analysis

Open the Timeline window and scroll the video to the position where the Stimulus starts. Then press the Stimulus trigger key. A question appears whether you want to score the Stimulus at that point. Choose Yes.

Notes

• Multiple instances of the same Stimulus may not overlap. Therefore, do not start a Stimulus when the previous instance of this Stimulus has not ended.
• Do not score a Stimulus when the remaining video time is shorter than the Stimulus duration. If you do so, opening the Scored Stimulus window automatically moves the Stimulus start time to the latest possible moment in that video.
• Scored Stimuli appear in the Project Explorer as dots above the analysis bar. Expand the Analysis and Scored Stimuli items to view the scored Stimuli.
• To copy scored Stimuli to other participants or analyses, unfold the analysis and double-click Scored Stimuli. Click the Stimulus you want to copy. Click Scored Stimuli at the top of the window that opens, and choose one of the options under Copy To.
• To make sure the analysis is not interrupted, FaceReader does not give a warning during the analysis if you score overlapping Stimuli or score a Stimulus that continues after the end of the analysis. Instead, an error mark will appear in the Project Explorer and you must correct the scored Stimuli after the analysis is finished.

To do so, double-click Scored Stimuli or one of the lines. Alternatively, right-click Scored Stimuli, then select Edit Analysis, and then Edit Scored Stimuli & Event Markers. The Scored Stimuli window opens. The time periods in which Stimuli of the same type are overlapping are marked in red.

Move the Stimuli to their correct position, so that they are no longer overlapping. To delete a scored Stimulus, click the Delete Scored Marker button.

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