## 3 Method
### Choice of Images  
A set of images was chosen by a team of experts, including a psychologist and a museum specialist, using the Basic Emotions Theory [51; 52], representing basic emotions like anger, happiness, sadness, fear, surprise, and disgust since these emotions seem to be globally recognized and expressed. In addition, these emotions are a combination of positive and negative ones as they are recognized as the primary emotion categories from the Circumplex Model of Affect [53; 54]. Overall, 14 images were used. The descriptions of the images are shown in Table 1 in the order of presentation (the actual images are not presented due to copyright issues). Table 1 also describes the main emotion found after the sentiment analysis of the images and the main emotions expected by the psychologist of the study. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Presentation** & **Image Name** & **Description** & **Sentiment Analysis** & **Experts\({}^{\prime}\)** \\
**Order** & **Image Name** & & **Anger 0\%** & \\
3 & Flower garden & A beautiful flower garden with arches of red, fuchsia and pink flowers over a neat alley among two lanes of green bushes. & Fear 0\% & **Joy 97\%** & **Joy** \\  & & & Sadness 1\% & \\  & & & Surprise 2\% & \\ \hline
4 & Happy baby & A happy, smiling baby with blue eyes being playfully covered with a white towel. & Anger 0\% & \\  & & & **Disgust 0\%** & \\
4 & Happy baby & A happy, smiling baby with blue eyes being playfully covered with a white towel. & Fear 0\% & **Joy 100\%** & **Joy** \\  & & & Sadness 0\% & \\  & & & Surprise 0\% & \\ \hline
5 & Family selfie & A family with children, parents and grandparents, getting close to each other for a selfie. All members are smiling and looking towards the camera. & Anger 0\% & **Joy 34\%** & **Sadness 3\%** \\  & & & **Disgust 2\%** & \\
6 & Wildfire & Burnt forest after a wildfire eliminating one million acres. & Fear 6\% & **Sadness** \\  & & & **Disgust 2\%** & \\  & & & Sadness 29\% & \\  & & & Surprise 23\% & \\ \hline
7 & Children into severe famine & African children into severe famine, obviously malnourished and underweight, with their bones being visible under their skin. They are stretching their hands, presumably asking for food. & Anger 5\% & **Sadness** \\  & & & **Disgust 12\%** & \\
8 & Spider & A solifugae-species spider. & Fear 8\% & **Fear** 8\% & **Fear** \\  & & & **Sadness 13\%** & \\  & & & Surprise 21\% & \\ \hline
9 & At the edge & A person standing at the edge of a rooftop, high above the ground. High risk of falling. & Anger 2\% & \\  & & & **Disgust 1\%** & \\
9 & At the edge & A person standing at the edge of a rooftop, high above the ground. High risk of falling. & Fear 83\% & **Fear** \\  & & & **Sadness 1\%** & \\  & & & Surprise 10\% & \\ \hline
10 & Nazi parade & [PERSON] moving upwards some stairs among Nazi soldiers lining up holding Nazi flags. & Anger 6\% & \\  & & & **Disgust 5\%** & \\
11 & Jack in a box & A Jack in a box happily jumping out of its box. & Fear 1\% & **Surprise** \\  & & & **Sadness 1\%** & \\  & & & **Surprise 74\%** & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._The images were used as input in the Sentiment Analysis Web Application to ensure the presentation of a diverse spectrum of emotions. The analysis showed that, indeed, the images chosen could provoke all 6 basic emotions, as shown in Figure 5.  
Testing the intensity of the emotions provoked, the Sentiment Analysis Web Application showed that there is adequate fluctuation of emotions. Figures 6 and 7 show examples of the intensity of emotions for the different images. Testing the order of presentation, the Sentiment Analysis Web Application showed that the order of the presentation of the images maintains a balance between negative and positive images and spreads them throughout the presentation (Figure 4).