Study on the Difference of BIS/BAS Scale between Sasang Types

Lee, Soo Jin; Kim, Sung Hye; Lim, Nangyeon; Ahn, Mi Young; Chae, Han

doi:https://doi.org/10.1155/2015/805819

Evidence-Based Complementary and Alternative Medicine

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Research Article | Open Access

Volume 2015 | Article ID 805819 | https://doi.org/10.1155/2015/805819

Study on the Difference of BIS/BAS Scale between Sasang Types

Soo Jin Lee,¹Sung Hye Kim,²Nangyeon Lim,¹Mi Young Ahn,³and Han Chae²

Academic Editor: Roberto Miniero

Received26 Jun 2015

Accepted17 Sept 2015

Published22 Nov 2015

Abstract

Introduction. The purpose of this study was to examine the differences in temperament between So-Yang (SY) and So-Eum (SE) Sasang types using Behavioral Inhibition System/Behavioral Activation System (BIS/BAS) scale to elucidate the biopsychological mechanism underlying the Sasang typology, a traditional Korean personalized medicine. Methods. 248 university students were categorized into three Sasang types, and series of t-tests were conducted, separately for male and female participants, to examine the difference of Behavioral Inhibition System (BIS), Behavioral Activation System (BAS), BAS-Drive (BAS-D), BAS-Fun Seeking (BAS-FS), and BAS-Reward Responsiveness (BAS-RR) scores between SY and SE Sasang types. Results. There were significant differences between Sasang types in the BIS/BAS subscales with consideration of gender. In male participants, BAS-total score of SY type () was significantly (, ) higher than that of SE type (). On the other hand, in female participants, BIS score of SY type () was significantly (, ) lower than that of SE type (). Discussion. The current study suggested relationship between Sasang typology and Behavior Inhibition and Activation Systems and showed significant differences in BIS/BAS scale between SY and SE Sasang types. Further studies on biological base of Sasang typology are needed.

1. Introduction

Sasang typology is a traditional Korean medical typology dividing people into four Sasang types based on their unique organ system [1], which determines type-specific temperaments [2, 3], pathophysiological characteristics [4], disease susceptibility [5, 6], and response to specific treatments [7]. Research has been reported that the psychobiological characteristics of Sasang typology might have biological basis [8–10]; however it was not satisfactory to indicate underlying mechanisms (Table 1).

The So-Yang Sasang type is an extroverted, active, inquisitive, outgoing, quick-tempered, excitable, dynamic, easy-going, and impulsive person with strong interest in the outside world; on the contrary, the So-Eum Sasang type is introverted, passive, negative, organized, reserved, static, meticulous, patient, cautious, and nervous person focusing on their inner world [8].

Previous studies on the temperament of each Sasang type presented that the characteristics of So-Yang (SY) and So-Eum (SE) Sasang types are opposing each other [2, 3, 8, 11]. It has been reported that the So-Yang and So-Eum types have contrasting characteristics with Eysenck’s Neuroticism and Extraversion and Cloninger’s Novelty-Seeking (NS) and Harm-Avoidance (HA) [2]. The SY type was high on Extraversion and NS whereas it was low on Neuroticism and HA. On the contrary, the SE type was high on Neuroticism and HA whereas it was low on Extraversion and NS [2, 3, 8].

Interestingly, Cloninger’s NS and HA are known to have influence from Gray’s Behavioral Activation and Inhibition System, which might have important meanings in Sasang typology, equivalently [10, 12]. Gray’s Behavioral Activation and Inhibition System are two pivotal motivational systems, which are considered to be responsible for affective states, behavior, personality, and predispositions for various forms of psychopathology, and there have been considerable number of studies for the measurement and understanding of its neuroanatomical and psychometric properties [13–15].

Considering the meanings of inhibition and activation from biological perspective, these two contrasting concepts can be translated into Yin and Yang of traditional medicine in dualistic perspective. Yin-Yang is a representative term for two opposite characteristics of nature as introvert-extrovert, passive-active, negative-positive, cold-hot, moon-sun, night-day, dark-bright, slow-fast, and so on [8].

As for a biological system, Yang is predisposed to respond actively and externally towards environmental stimuli, whereas Yin is predisposed to be withdrawn and passive. Comparing the concept of Yin-Yang in traditional medicine to Western biological concepts of Behavioral Inhibition and Activation is an interesting research topic, in that it attempts an integrated approach toward research on biopsychology across the East and the West.

Therefore, in the current study, it was aimed to test whether the Behavioral Activation and Inhibition systems reflect the characteristics of SY and SE Sasang types, which represents the biological characteristics of Yang and Yin [8], respectively. Carver and White’s BIS/BAS scale was used for the measure of Behavioral Activation and Inhibition system [16, 17]. It measures Behavioral Inhibition System (BIS) and Behavioral Activation System (BAS). The BIS measures the activation from aversive stimuli such as anxiety, fear, and worry. The BAS is a sum of three subscales of BAS-Drive (BAS-D), BAS-Fun Seeking (BAS-FS), and BAS-Reward Responsiveness (BAS-RR). The BAS-D measures the degree to which individuals pursue appetitive goals. BAS-FS reflects tendency to seek new potentially rewarding experiences and to act on incentives of the moment. BAS-RR focuses on positive responses to an occurrence of reward.

The results in this study would be useful for analyzing biopsychological characteristics of Sasang typology and would provide new diagnostic tools for those who have interest in differentiating Sasang types in their clinics. Furthermore, we can find similarities and differences between traditional temperament theory of Yin and Yang and Western biopsychology of BAS and BIS, and it would be useful for providing foundations for integrative biopsychology across the East and the West [8, 12].

2. Methods

2.1. Participants and Measurement

A total of 270 individuals from School of Korean Medicine were asked to complete QSCCII for Sasang type classification and BIS/BAS scale for BAS-D, BAS-FS, BAS-RR, BAS, and BIS measurement. The following procedures were approved by the Institutional Review Board of Pusan National University. All participants were provided with a written consent form for this study.

The BIS/BAS scale was developed by Carver and White [16] and was tested for the psychometric structure [18, 19]. We used Korean version translated by K.-H. Kim and W.-S. Kim [17], which was reaffirmed by comparing the original and translated versions side-by-side. The BIS/BAS scale consists of 24 items including four filler items, and each item is scored using a 4-point Likert scale from “strongly disagree” [1] to “strongly agree” [4]. The BAS scale has 13 items including BAS-D (4 items), BAS-FS (4 items), and BAS-RR (5 items), whereas the BIS has 7 items.

The QSCCII, a Sasang typology-based diagnostic inventory, is composed of 121 items concerning type-specific body shapes, psychological characteristics, life style, and pathophysiological symptoms. It was developed in 1993 and was revised in 1996. It has been used as an objective measurement in Sasang typology studies. The correctly predicted percentage of QSCCII was reported as 70.08% [20]; and the internal consistency calculated with Cronbach’s alpha for Tae-Yang (TY), So-Yang (SY), Tae-Eum (TE), and So-Eum (SE) Sasang types was 0.57, 0.58, 0.59, and 0.63, respectively [21].

2.2. Statistical Analysis

Descriptive statistics on gender, education level, and age of each Sasang type were analyzed. test for gender and education level and Analysis of Variance (ANOVA) for age were used to find differences between Sasang types.

The internal consistency of BIS/BAS subscales was analyzed with Cronbach’s alpha. Item number and mean and standard deviation for each subscale were calculated.

-test was conducted to compare BAS-D, BAS-FS, BAS-RR, BAS, and BIS levels between SY and SE types. Statistical results were presented as frequency (%) or mean ± standard deviation, and statistical significance level was set at , , and . PASW Statistics 18.0 (IBM, Armonk, NY) was used for all statistical analysis.

3. Results

3.1. Demographic Characteristics of the Participants

Data from 248 participants were used in the final analysis. The numbers of So-Yang (SY), Tae-Eum (TE), and So-Eum (SE) types classified with QSCC II were 58, 64, and 126, respectively (Table 2). As a result of the analyses to find differences of Sasang types between groups, there was a significant difference of Sasang type between genders ( = 11.960, ). However, no significant difference was found in age or education level.

3.2. Reliability of the BIS/BAS Scale

Internal consistencies of BIS and BAS items were calculated with Cronbach’s alpha (Table 3). Data from 247 participants were used. The mean and standard deviation of BAS (13 items) were , whereas the mean and standard deviation of BIS (7 items) were . Cronbach’s alpha levels were acceptable: 0.824 and 0.834 for BAS and BIS, respectively.

3.3. BIS/BAS Scale Profile of So-Yang and So-Eum Sasang Types in Male and Female Participants

In male participants, the results of -test to evaluate the differences between SY and SE types are shown in Table 4. The differences of BAS-D and BAS between SY and SE types were significant. The BAS-D of SY type () was significantly (, ) higher than that of SE type (). The BAS of SY type () was significantly (, ) higher than that of SE type ().

In female participants, the results of -test to find the differences between SY and SE types were shown in Table 5. The differences of BAS-FS and BIS between SY and SE types were significant. The BAS-FS of SY type () was significantly (, ) higher than that of SE type (). On the other hand, the BIS of SY type () was significantly (, ) lower than that of SE type ().

4. Discussion

The current study examined Carver and White’s BIS/BAS scale profile of SY and SE Sasang types (Table 1) and showed that the BAS of male participants and the BIS of female participants were significantly different between SY and SE Sasang types (Tables 4 and 5).

The results in this study, in combination with previous studies with Cloninger’s NS and HA, are partly confirmed as hypothesized, in that the mechanism of Sasang typology might be related to the neurobiological base of Gray’s biological personality theory [10]. Gray’s notion of Behavioral Activation and Inhibition Systems suggests two main brain systems regulating approach and withdrawal behaviors to environmental stimuli [8, 22].

The Yin and Yang (Eum and Yang) are two opposing and complementary sides of the nature and have been a theoretical basis of traditional medicine for thousands of years in East [8]. And this concept was shown to have phenotypic similarities with temperament (cold-warm) and humidity (wet-dry) in humoral theory of Hippocrates and Galen which is an archetype of Western personality theories [23].

It was reported in functional neuroscience literature that the differential activation patterns in hippocampus, parahippocampal cortex, and amygdala caused by fear-related stimuli are positively correlated with Carver and White’s BIS [24], which was shown to play a role in modulating anxiety related behaviors and negative emotion [22]. And the mesolimbic and mesocortical dopamine projections including ventral striatum and orbital regions of the prefrontal cortex are shown to be related to Carver and White’s BAS [25, 26], which is known to be crucial for approach behavior and reward-related motivation [22].

Considering existing research on the biological base of Sasang typology along with current study [2, 3, 8, 9], SY and SE Sasang type might have differences in Behavioral Activation and Inhibition system, which have neuroanatomical structural basis. Those with SE Sasang type might have anxiety-related and negative emotion-related serotonergic circuits in hippocampus, parahippocampal cortex, and amygdala that have innate tendency to show negative or avoidant reaction to the unknown or harmful stimulations. SY Sasang type might have predisposed development with approach and reward-related mesolimbic and mesocortical dopamine projections including ventral striatum and orbital regions of the prefrontal cortex which could result in active and explorative reaction to the outside environment [8, 10, 12, 22]. Further studies on the relationships of SY and SE Sasang types with neuronal structure and neurotransmitter would be needed.

As for the reason that there were gender differences in BIS and BAS scale, unlike the case with Cloninger’s NS and HA, there would be some speculations. First, the psychometric structure of Carver and White’s BIS/BAS scale might include gender differences, which was shown as pivotal for Sasang typology [8]. Carver and White previously reported that BIS and BAS-RR of female participants (21.09 and 17.90, resp.) were significantly higher than those of male participants (18.84 and 17.27, resp.) [16]. The gender-specific neuroanatomical basis of BIS/BAS scale [22] and the relationship between BIS/BAS scale and socioemotional functioning in children [27] were also reported.

Second, there is a possibility that some items of BIS/BAS scale are related to gender roles differentially applied in the East and the West [8]. Though the filler items are not included in the calculation, the following items might trigger gender roles in East Asian society: “a person’s family is the most important thing in life,” “how I dress is important to me,” and “it is hard for me to find the time to do things such as getting a haircut.”

Third, the BIS/BAS scale may measure different dimensions from those of Cloninger’s HA and NS, which was reported to measure Gray’s Behavioral Activation and Inhibition System [28, 29]. As an example, when correlation analysis was conducted between BIS/BAS and Tridimensional Personality Questionnaire (TPQ), Cloninger’s previous biopsychological model of TCI, HA (, ) was significantly correlated with BIS but NS (, n.s.) was not [16].

These results emphasize a need for additional correlation studies on the personality construct of BIS/BAS and TCI along with Sasang Personality Questionnaire (SPQ), which measures the temperamental dimension of Sasang typology. The SPQ is a Yin-Yang based objective dimensional measurement with proven clinical validity and reliable psychometric properties [8]. The SPQ-total score showed distinctive differences between SY and SE types with respect to age and gender [8].

Considering that the BIS/BAS scale can measure the differences between SY and SE Sasang types, the Sasang typology can be used in diverse clinical fields since its Korean BIS/BAS version [17] has been used for the studies on heart rate variability [30], eating behavior [31], internet game addiction [32], depression [33], problematic alcohol use [34], motivation and interest [35], response to affective stimuli [36], and subjective well-being [37].

The results of the current study supported our prediction that significant differences of BIS and BAS exist between SY and SE Sasang types when gender is taken into account. The understanding for biological basis of Sasang typology would become more profound and integral with further research incorporating more participants and cultural contexts [38].

Conflict of Interests

The authors have no conflict of interests to disclose.

Acknowledgment

This work was supported by a 2-Year Research Grant of Pusan National University.

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Copyright © 2015 Soo Jin Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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