Knowledge Base

The Consumption Behavior Module

Main Topics

• Introduction to the Consumption Behavior Module
• Analyze Consumption Behavior
• Visualize Consumption Behavior

Introduction to the Consumption Behavior Module

The Consumption Behavior Module allows you to analyze the behaviors Intake event, Chewing and Chew motion.

Intake event is taking a bite or sip. Chew motion is one movement of the jaws to chew the food in the mouth. Chewing is the state from the first chew motion (after taking a bite) till the last chew motion (before swallowing the food).

Please note that you cannot combine the Consumption Behavior Module with Baby FaceReader and you cannot analyze consumption behavior in a multi-subject analysis.

Guidelines

To make sure that analysis of consumption behavior goes well, it is important that not only the face but also the test participant's hands are visible in the camera view. Currently, FaceReader can only detect hands and no cutlery, hence, the hands entering the face region is important for FaceReader to detect eating behavior. Wiping the mouth can yield a false positive intake event.

To detect drinking behavior, FaceReader uses images of cups, not straws. Hence, it is important not to use straws in your experiments.

Analyze Consumption Behavior

Aim

To switch on Consumption Behavior analysis.

Prerequisite

• You have the regular version of FaceReader with the Consumption Behavior Module.
• From the participant, both the face and the hands are visible.
• You followed the Guidelines for good analysis.

Procedure

1. Choose File > Settings > Analysis options.
2. Under Optional Classifications, select Consumption behavior.

Visualize Consumption Behavior

Aim

To display the Consumption Behavior during or after the analysis.

Prerequisites

• You have the regular version of FaceReader and your license includes the Consumption Behavior Module.
• Consumption Behavior analysis is switched on in the Settings.

See Analyze Consumption Behavior

Consumption Behavior on the Timeline

1. Click the Select window button in one of the visualization windows and select Timeline. The Timeline window opens. The Timeline gives an overview of the Facial Expressions States, and Optional classifications on a timeline.
2. From the Consumption Behavior drop-down list, select what behaviors you want to view.

You can play back through the timeline together with playing back the analyzed video.

Consumption Behavior Statistics

1. Click the Select window button in one of the visualization windows and select Consumer Behavior and then Consumption Behavior Statistics. The table displays the number of intake events (bites and sips) and chew motions. The Current column displays the numbers up to the current moment in the analysis. During the analysis, the Total column displays the numbers up to the current moment in the analysis. After the analysis, the Total column displays the numbers in the entire analysis.

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