STUDY OF BASIC EMOTIONS IN THE GENERAL POPULATION USING THE LIKERT SCALE

Received: 25 Apr 2023 Received in revised form: 14 Jul 2023 Accepted: 20 Jul 2023 Available online: 28 Aug 2023


Introduction
One of the most widely held theories about emotions assumes that there is a limited set of emotions. From a biological perspective, it is assumed that there is a physiological mechanism for them [1][2][3]. Basic emotions are also called fundamental. There is no agreement as to which emotions are fundamental. Some authors have proposed that there are only two basic emotions: pain and pleasure. Others have proposed happiness, sadness, anxiety, anger, and disgust. Frijda proposed in 1987 that there are 6 basic emotions [4][5][6]. Ekman proposed that there are basic emotions: anger, disgust, fear, joy, sadness, and surprise, based on universal facial expressions [1,2]. Studying facial expressions to understand emotions dates back to Darwin. The movement of certain facial muscles is linked to the expression of certain emotions [7][8][9]. For example, the narrowing and tightening of the red edge of the lip, produced by the orbicularis oris, is only present in anger [10,11]. Only one certain muscle is required to express disgust, this being the levator of the upper lip [12,13]. Emotions can occur milliseconds after the triggering stimulus has occurred. Emotions do not last very long unless the stimulus that produced them reappears. Emotions do not last very long unless the stimulus produced them [14,15]. Differential emotion theory explains that in the person-environment interaction, cognition emerges, which interacts with feeling-emotion, and motivation that forms an affective-cognitive structure in which there is a network of feelings, images, evaluation, thoughts, and goals [16,17]. One model of understanding emotions suggests that for example happiness is seen as progress towards goals, sadness when a goal is lost. Anger when a plan is blocked. Fear when a conflict that threatens the goal or one's preservation arises. Disgust Emotions are an important part of the human psyche that directs social behavior. Because of the complexity and limited understanding of the nature of these psychological elements, their practical study is often difficult. The use of the Likert scale together with the recall of emotional experiences over some time is considered to be an effective method of studying emotions. We analyzed the normal distribution of the basic emotions in a general population group and found that anger and sadness have a statistically normal distribution. Studying a larger group might show a statistically normal distribution for the rest of the fundamental emotions. Cronbach's Alpha value is 0.880 which translates into a high reliability level. The Likert scale is a practical tool for studying basic emotions. By recalling and evaluating emotions on a scale, it is possible to evaluate emotional experiences in the studied group. Happiness and sadness have a statistically normal distribution in the studied group. The practical assessment of emotions can be used in statistical correlations to evaluate different behaviors. when the perception of rejection arises. And longing when something arises that requires addressing [18]. The influence of emotions is strong in children and diminishes in adult life with social learning and cognitive development. Non-basic emotions are numerous and last longer [19]. In addition, some regions are associated with specific emotions, such as the amygdala for fear and the insula for disgust, and other regions are activated by multiple emotions [20]. Joy and disgust have been associated with increased metabolism in the basal ganglia. The medial part of the prefrontal cortex was associated with all emotions studied [21]. Basic emotions are considered innate, adaptive, and universal [22]. New theories suggest that emotions are linked to specific neural circuits rather than to distict anatomical structures [23]. Disgust is an emotion that is given by a strong state of repulsion towards certain substances or situations. The insula is considered the anatomical area involved in the occurrence of disgust. Disgust is correlated with activity in subcortical areas such as the striatum and amygdala [24]. Some researchers say that emotions have two dimensions: the affective nucleus with a positive or negative valence and an excitatory dimension, which involves the activation or deactivation of the nervous system [25]. Research has made considerable progress mainly due to the growth of diffusion methods for the grounding of affective interference in direct and indirect relationships with physiological responses modulated by the autonomic nervous system [26,27]. Facial expression recognition techniques analyze the shape and pattern of facial features as a result of emotional responses when individuals are exposed to external and internal stimuli [28,29]. The difficulty in defining emotions is due to their delineation from other affective states such as preferences, attitudes, passions, and affect. The problem of defining emotions is still encountered today and has a major impact on the model of emotions. There are 3 major theories of emotions: basic emotions, dimensional emotions, and reward theory [30]. The role of emotions in the workplace has received a lot of attention over the last two decades. We all experience different emotions at work. In psychology, the functional and evolutionary perspective on emotions is relatively dominant. According to them, emotions are important for humans in survival and for appropriate adaptation to the environment. Each discrete emotion, such as fear and anger, serves a unique function [31]. Emotion is an important concept in art, literature, and everyday life and is part of the core of human experience. Traditionally, emotions are characterized as dichotomous, such as negative and positive, pleasant-unpleasant, and activated-deactivated. Ekman suggested that there are universal emotions proven by cross-cultural studies in terms of facial expressions. This claim is widely accepted by researchers studying emotions [32]. Researchers have found that reasoned messages do not influence the response of children between 7 and 10 years of age, but their response is shaped by music, color, and the emotions conveyed through advertisements. Measuring emotions in children is very difficult. However, even in adults, it poses many difficulties. The difficulty is due to a lack of introspection and retrospective skills or the individual's preference not to share emotional states with strangers [33]. Music generates varied emotions among listeners. The difference between emotions and feelings is that emotions emerged earlier in evolution and they reappear much faster under external influence. The basic emotions are the oldest and are the same in both humans and animals. Complex emotions are associated with human cognitive activity, education, national history, and membership in a particular socio-cultural group [34]. When we are angry (emotion) or grumpy (affective state) we feel bad, and when we are proud (emotion) and when we are cheerful (affective state) we feel good. The difference between these two structures is that an emotion lasts for seconds or minutes, while an emotional state lasts for hours or days. Emotion has a rapid and episodic onset, while affective mood has a gradual and continuous onset [35]. Affective states and emotions have a bidirectional relationship with food. On the one hand, they can influence the motivation to eat and induce changes in eating behavior, and on the other hand, food consumption can alter the affective state and emotions of individuals [36]. The study of emotions has also been carried out in the field of politics. Partisan identification has been defined as an affective orientation towards an important object in the group. Affective intelligence theory is an example of political science and suggests that methods of measuring affective response can be used in certain political doctrines. This theory suggests, for example, that an increase in anxiety leads to an orientation towards novelty and the initiation of interest in learning. Thus, anxiety is expected to be related to new information. Finally, this theory argues that increased aversion causes individuals to strengthen their attachment to their preferred politicians [37].

Materials and Methods
We studied a group of 50 people from Romania aged over 18 years with a relatively homogeneous distribution in terms of age and gender. For the study of emotions, we applied the theory of fundamental emotions that assumes the existence of 6 emotions respectively; happiness, sadness, fear, anger, surprise, and disgust. We used a Likert scale with 6 degrees of intensity scored from 0 to 5. Zero means that the emotion was not felt at all and 5 means that it was felt very intensely. The reference period was two weeks during which we asked subjects to recall whether they felt the underlying emotions and in what context. To make it easier to understand the context, we set out four elements that could generate a core emotion, namely; an object or animal, a person, an event, or an institution. The data collection method was a structured interview. We used SPSS 26 for data analysis.

Results and Discussion
Participants were aged between 18 and 74 years. With an average age of 36 years. In terms of gender distribution, 54% of the participants were female and 46% were male. And the background 36 of the participants are urban and 14 are rural. And in terms of education level that 24 of the participants are in higher education, 24 are in secondary education, and 2 are in primary education.  Table 1). Estimation of data distribution normal using standard deviation. We use the estimated value of the data distribution by calculating Mean plus twice the standard deviation respectively minus the same value. We obtain an estimated maximum value    The box plot shows a normal distribution of data with no outliers (Figure 4).

Checking the Normal Distribution of Data
The analysis of the descriptive statistical data results that two emotions, happiness, and sadness, have a normal distribution in the studied group ( Table 2). The other fundamental emotions do not have a normal distribution. Taking into account these elements, statistical studies on correlations should be done using non-parametric tests ( Table 3). The Cronbach's Alpha value is 0.880 which translates into a high level of reliability [38]. In children, a low Cronbach alpha score using the Likert scale was associated with a lack of emotional awareness [39]. The Likert scale is the most widely used instrument for measuring affective components [40].
The use of both past and present tense is used with the Likert scale for both basic and complex emotions. Emotion intensity has been associated with athlete performance. The resolution of internal inconsistency of the questionnaire is solved by some authors by eliminating outliers [41]. The scientific study of emotions is thought to have been started by Darwin. Another method of measuring emotions is to use the International Affective Picture System [42,43]. Emotions are also influenced by the mental health and associated acute pathologies of an individual [44][45][46]. The Likert scale is considered to be very effective for measuring social and behavioral sciences. A score between 0.86 and 0.89 is considered to have high reliability and internal consistency [47]. Some authors have shown that the use of even a three-item Likert scale did not significantly change the internal consistency [48,49]. Measuring emotions is very complex and can be done from many perspectives from psychiatric disorders to theories of emotional intelligence and the big five theory [50].

Conclusion
The theory of basic emotions assumes the existence of 6 basic emotions, and from these emotions develop the other more complex emotions. The practical study of emotions is difficult, but useful in research. The Likert scale is a practical tool for studying basic emotions. By recalling and evaluating emotions on a scale, it is possible to evaluate emotional experiences in the studied group. Happiness and sadness have a statistically normal distribution in the studied group. The practical assessment of emotions can be used in statistical correlations to evaluate different behaviors.