# A Survey on Datasets for Emotion Recognition from Vision: Limitations and In-the-Wild Applicability
## 2 Perceived Emotion in Humans
### The Portrayal of Emotion
\begin{table}
\begin{tabular}{p{42.7 pt} p{341.4 pt}} \hline \hline
**Emotion** & **Description of Body Movements** \\ \hline Joy & Various purposeless movements, jumping, dancing for joy, clapping of hands, stamping while laughing, head nods to and fro, during excessive laughter the whole body is thrown backward and shakes or is almost convulsed, body held erect and head upright (pp. 76, 196, 197, 200, 206, 210, 214) \\ \hline Sadness & Motionless, passive, head hangs on contracted chest (p. 176) \\ \hline Pride & Head and body held erect (p. 263) \\ \hline Shame & Turning away the whole body, more especially the face, avert, bend down, awkward, nervous movements (pp. 320, 328, 329) \\ \hline Fear & Head sinks between shoulders, motionless or crouches down (pp. 280, 290), convulsive movements, hands alternately clenched and opened with twitching movement, arms thrown wildly over the head, the whole body often turned away or shrinks, arms violently protruded as if to push away, raising both shoulders with the bent arms pressed closely against sides or chest (pp. 291, 305) \\ \hline Anger/rage & Whole body tremles, intend to push or strike violently away, inanimate objects struck or dashed to the ground, gestures become purposeless or frantic, pacing up and down, shaking fist, head erect, chest well expanded, feet planted firmly on the ground, one or both elbows squared or arms rigidly suspended by the sides, fists are clenched, shoulders squared (pp. 74, 239, 243, 245, 271, 361) \\ \hline Disgust & Gestures as if to push away or to guard oneself, spitting, arms pressed close to the sides, shoulders raised as when horror is experienced (pp. 257, 260) \\ \hline Contempt & Turning away of the whole body, snapping one’s fingers (pp. 254, 255, 256) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Body movements observed with emotions [30; 32]. argument for datasets based on images, for example. Another possible type of expression is one extended in time, in which a sequence of signals provides the necessary cues. Ref. [34] discusses that emotions such as embarrassment, amusement, and shame have a distinct nonverbal display on facial expressions and other cues related to the facial area. For example, embarrassment is marked by gaze aversion, shifty eyes, speech disturbances, face touches, and nervous smiles. This is an argument for datasets based on videos, for example. However, given how emotions are intrinsically innate to each person, it is difficult to argue which emotion a specific person is feeling. This is why a discussion regarding perceived emotion is more accurate, meaning understanding how that person exposes their emotion naturally or in a posed manner. Therefore, can there be emotions without facial expressions? As [PERSON] [31] discussed, individuals may not show any visible evidence of emotion in the face. [PERSON] and [PERSON] and [PERSON] [35] showed in their work that by employing surface electromyography, they could record slight electrical variations in the face. This means that even when someone does not display emotions in their face, they do so in an unobservable manner. People can also try to fabricate expressions when they do not feel any emotion, in an attempt to mislead the observer. Evidence suggests that emotions such as enjoyment, anger, fear, and sadness contain muscular actions that most people are unable to perform voluntarily, meaning that, although this is possible, it is difficult to do so in a convincing manner [31; 36]. This can be expanded into other aspects of behavior that one may want to disguise. For example, suppose one deliberately wants to hide their visible emotion by forcing expressions on their face, in that case, cues from the felt emotion could be perceived from other sources, especially body language [37].