Introduction
The Temporal Dominance of Sensation (TDS) involves presenting the panellist with a comprehensive list of attributes. Subsequently, the panellist is tasked with identifying the dominant attribute, representing the most prominent perception at a given moment. Throughout the evaluation, when the panellist perceives a shift in the dominant attribute, they are required to select the new dominant attribute, continuing this process until the perception concludes.
In the training sessions, a dominant attribute is defined as the attribute associated with the sensation that captures attention at a specific moment. This is primarily the new sensation emerging at that time, not necessarily the one with the highest intensity.
Template Description
The template starts with a welcome screen which can be used to provide additional information to panellists before the start of the TDS task. In the design section, the first screen has instructions, followed by a question where participants can start the TDS task.
Panellists are presented with a list of attributes that can be chosen once they click the "Start" button. Upon completing the evaluation, panellists can select "Stop" to conclude the evaluation. In the standard settings of the TDS question type, customization of default options for participants is possible. To delete existing attribute options, you can select the bin icon. For adding more attributes you can type the attribute name and select the plus icon. The attribute word on the left side is what panellists see, while the one on the right side is the data-stored value. The word shown to panellists can be the same as the word stored in the value. Bulk addition of attributes is possible by selecting the list icon, pasting all attribute names, and clicking "Add item." For including both attribute names and values in bulk, type "Attribute Name | Attribute Value" (e.g., "Sweetness | sweetness").
Within the advanced settings of the TDS question type, you can choose to change the layout of the attribute shown from horizontal to vertical. Furthermore, you can decide whether you want to set a Time limit and to let panellists to reset the time by enabling “Resettable”. Finally, you can also ask panellists to indicate an intensity value of the dominant selected attribute. By activating the "Use Sliders" option, you gain the ability to specify the anchor name and set the scale value for the anchors.
In the time settings, you can decide to display predefined messages to panellists at specified time. You have the flexibility to display a maximum of 10 messages.
In the end screen, the template incorporates a thank-you message, providing an opportunity for you to personalize a final message for the panellists.
In the design settings, you can check the way in which each panellist will receive the samples, with each set having a different presentation order for an individual panellist. In this template, three samples are presented in a monadic sequential order, implying that all questions in the design section will be asked for each sample consecutively.
If you wish to include additional samples, you can achieve this by navigating to Design > Generate Design and modifying the number of samples. Subsequently, click on Generate Design to implement the changes.
Raw Data Representation:
The raw data will be presented, where each row corresponds to a specific panellist and the respective sample presented to the panellist. The TDS column will store the overall duration of the evaluation, while each attribute will have a dedicated column indicating the time interval during which the attribute was selected as dominant.
Analysis
Once data has been gathered, you can access EyeOpenR and navigate to the Temporal Analyses. Within the analysis option you can select whether to obtain Dominance Curves or Band Plot.
References
- Pineau, N., Schlich, P., Cordelle, S., Mathonnière, C., Issanchou, S., Imbert, A., ... & Köster, E. (2009). Temporal Dominance of Sensations: Construction of the TDS curves and comparison with time–intensity. Food Quality and Preference, 20(6), 450-455.