Reinforcement sensitivity theory

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Reinforcement sensitivity theory (RST) proposes three brain-behavioral systems that underlie individual differences in sensitivity to reward, punishment, and motivation. While not originally defined as a theory of personality, the RST has been used to study and predict anxiety, impulsivity, and extraversion. [1] The theory evolved from Gray's biopsychological theory of personality to incorporate findings from a number of areas in psychology and neuroscience, culminating in a major revision in 2000. [2] The revised theory distinguishes between fear and anxiety and proposes functionally related subsystems. Measures of RST have not been widely adapted to reflect the revised theory due to disagreement over related versus independent subsystems. [3] Despite this controversy, RST informed the study of anxiety disorders in clinical settings and continues to be used today to study and predict work performance. [4] [5] RST, built upon Gray's behavioral inhibition system (BIS) and behavioral activation system (BAS) understanding, also may help to suggest predispositions to and predict alcohol and drug abuse. [6] RST, a continuously evolving paradigm, is the subject of multiple areas of contemporary psychological enquiry. [7]

Contents

Origins and evolution of the theory

Gray's biopsychological theory of personality was informed by his earlier studies with Mowrer on reward, punishment, and motivation and Hans Eysenck's study of the biology of personality traits. [8] Eysenck linked Extraversion to activation of the ascending reticular activating system, an area of the brain which regulates sleep and arousal transitions. [1]

Eysenck's two original personality factors, Neuroticism and Extraversion, were derived from the same lexical paradigm used by other researchers (e.g., Gordon Allport, [9] Raymond Cattell [10] ) to delineate the structure of personality. Eysenck's Extraversion-Arousal Hypothesis states that under low stimulation conditions, introverts (defined as low in Extraversion) will be more highly aroused than extraverts; however, under high stimulation, introverts may become over-aroused, which will feedback within the ascending reticular activating system and result in decreases in arousal. Alternatively, extraverts tend to show greater increases in arousal under high stimulation. [3] Eysenck also studied the relationship between neuroticism and activation of the limbic system using classical emotional conditioning models. His theory focused more on anxiety as a disorder than a personality trait. [3] Eysenck's theory predicts that introverts are more likely to develop anxiety disorders because they show higher neuroticism and stronger emotional conditioning responses under high arousal. His theory was criticized because introverts often show the opposite pattern, weaker classical conditioning under high arousal, and some supporting data confounded personality traits with time of day. [11]

Gray's biopsychological theory: behavioral activation and inhibition systems

Unlike Eysenck, Gray believed that personality traits and disorders could not be explained by classical conditioning alone. Gray proposed the Biopsychological Theory of personality in 1970 based on extensive animal research. [12] His theory emphasized the relationship between personality and sensitivity to reinforcement (i.e. reward and punishment). Eysenck's theory emphasized Extraversion, Neuroticism, and arousal, while Gray's theory emphasized Impulsivity, Anxiety, approach motivation, and avoidance motivation. [11]

In his original theory, Gray proposed two new dimensions to Eysenck's theory - anxiety and impulsivity. [11] Gray's anxiety, or BIS, correlates with Eysenck's neuroticism. [11] Gray's impulsivity, or BAS, correlates with Eysenck's extraversion. [11] Even though Gray's original theory was modified later by Gray himself, the original theory still made some contributions to the study of biological systems and their role in personality. [13] The largest of these contributions was that the biological central nervous system can be linked to a psychological reward system, composed of approach and inhibition systems. [13]

Gray's model of personality was based on three hypothesized brain systems:

Behavioral activation system (BAS)

Behavioral inhibition system (BIS)

Fight/flight system (FFS)

According to Gray, personality traits are associated with individual differences in the strengths of BAS (approach motivation) and BIS (avoidance motivation) systems. As it is defined for the remainder of the article, higher BAS/BIS refers to greater activation of that system. [21]

Measures

High BAS is generally associated with high extraversion, low neuroticism, and trait impulsivity, while high BIS is associated with low extraversion, high neuroticism, and trait anxiety. In addition to predicting trait standings, high BAS is associated with higher positive affect in response to reward, while high BIS is associated with higher negative affect in response to punishment. [8] Studies in Gray's laboratory supported his prediction that extraverts, higher in BAS and lower in BIS than introverts, are more sensitive to rewards, experience higher levels of positive affect, and learn faster under rewarding conditions. [1] [8]

The most widely used measures of the approach (BAS) and avoidance (BIS) systems are the BIS/BAS scales developed by Carver and White in 1994. [22] The Generalized Reward and Punishment Expectancies Scales (GRAPES) were also used to operationalize BIS and BAS. [23] Both self-report measures (listed above) and behavioral measures (such as affective modulation of the eyeblink startle response) have been used to test predictions and provide mixed support for Gray's theory. [3]

Critique

These measures were constructed under the assumption that BIS, BAS and associated traits Anxiety and Impulsivity are independent. [1] In contrast, Gray first described BIS and BAS as opposing systems with bidirectional inhibitory links in animal models. [3] Thus, empirical results that claimed to falsify the theory may have relied on faulty predictions for independent, non-interacting systems. Gray's theory was also criticized because the boundary between FFS (threat response system) and BIS (punishment system) was difficult to define empirically, akin to differentiating between fear and anxiety. [24] [25] Matthews and Gilliland proposed separate cognitive systems underlying fear and anxiety and emphasized the need to study these systems outside of animal models. [11] These critiques led to a major revision and renaming of the theory in 2000. [26] The Reinforcement Sensitivity Theory (RST) redefined the three systems underlying anxiety, impulsivity, motivation, and reinforcement learning. [26]

Reinforcement sensitivity theory

Reinforcement sensitivity theory is one of the major biological models of individual differences in emotion, motivation, and learning. The theory distinguishes between fear and anxiety, and links reinforcement processes to personality.

Behavioral activation system (BAS)

Behavioral inhibition system (BIS)

Fight-flight-freeze system (FFFS)

Improved measures

The fight-flight-freeze system (FFFS) was expanded to include all aversive/punishment stimuli, conditioned and unconditioned. Similarly, the Behavioral Activation System (BAS) was expanded to include all appetitive/reward stimuli. [26] The Behavioral Inhibition System (BIS) was defined as a conflict system activated whenever both BAS and FFFS are activated together or multiple inputs compete within the systems, thereby producing anxiety. [3] If the systems are assumed to be functionally related, the effect of a given stimulus is dependent upon the strength of that stimulus, reactivity in the activated system, and strength of the competing system. [3] Thus, for a reward, the behavior output from BAS is dependent on the strength of the reward, activation of the BAS, and inhibition strength of BIS. For example, if a reward outweighs a threat, the BIS should excite the BAS and inhibit the FFFS, which will likely result in approach behavior. [1]

The new RST distinguishes the subsystems underlying anxiety and fear. The FFFS is associated with fear and the BIS is associated with anxiety. This distinction is still debated, especially in clinical settings wherein BIS scores are sensitive to fear/panic-reducing, not anxiety-reducing treatments. [27] Furthermore, the possibility of anxiety's triggering panic and vice versa supports a model of the BIS and the FFFS in which the two are not causally independent. Conflicting results regarding the relationship between fear and anxiety may reflect measures which were not updated to reflect the functionally dependent systems of the new RST. [1] [3] A review by Perkins and Corr (2006) found that the BIS as measured in Carver, 1994 scales [22] and similar constructs tap into the FFFS (which fear responses) and not the true BIS (which underlies anxiety). These definitions were not updated to reflect the revised RST model. [26] [28] D.C. Blanchard and colleagues (2001) created vignettes with response options that modeled rodent reactions to anxiety (the BIS, used ambiguous/partially threatening stimuli) and fear (the FFFS, used pure threat situations) to study these constructs in humans. [29] These behavioroid scales ask: "What would you do if (insert scenario inducing fear or anxiety)?" Response options accurately reflect the revised RST, but have not been widely tested or applied. [25]

Separable and joint subsystems hypotheses

The revised RST reflects functional dependence of the systems; however, there are two competing hypotheses developed for testing RST predictions. The separable systems hypothesis (SSH) is defined by two independent systems, reward and punishment. [30] Independence implies that reactivity to rewards should be approximately equal across all levels of punishment, and reactivity to punishment should be equal across all levels of reward. Thus, rewarding stimuli may activate the BAS, without exerting effects on the BIS or the FFFS. [1] The SSH is proposed to operate in extreme circumstances, within individuals with highly reactive systems and/or experimental conditions that only present rewarding or punishing stimuli. [30] The separable subsystems hypothesis has been applied successfully to study reinforcement learning and motivation in clinical populations. [27] Alternatively, the joint subsystems hypothesis (JSH), in accordance with Gray's original animal models and the revised RST, states that reward and punishment exert combined effects in the BAS and the FFFS, while the BIS resolves conflict within and between the systems. The reward and punishment systems are defined as dependent, such that reward activation (the BAS) both increases responses to appetitive stimuli and decreases responses to aversive stimuli. The joint subsystems hypothesis is most applicable in real-world contexts that contain mixed stimuli: strong, weak, punishment, and reward. [30]

In a recent review on RST measurement, authors distinguished between dependent system inputs and dependent behavioral outputs. [25] The BAS, FFFS, and BIS are dependent systems, and current research attempts to define under what task situations and to what degree they interact. A rewarding stimulus may activate all three systems to some extent such that high scores on a BAS-related behavioral trait, for example, may include high BAS, low FFFS, and low BIS activations. [3] Corr and colleagues tested separate and joint subsystems predictions against each other. [3] Their results support the joint subsystems hypothesis: high anxiety individuals reacted more strongly to punishment cues, and this effect was stronger in jointly low impulsive, high anxiety individuals. [3] Pickering used regression and neural network models to show that patterns of inputs from the BAS and the BIS/FFFS generate a large range of outcomes that support the JSH (all three system activations were needed to determine best fit for behavioral output). [3] [24] There is now pharmacological evidence to support dependence of these systems, notably serotonergic (5-HT) modulation of the dopamine pathway. [1]

As mentioned previously, these complex, dependent systems are not reflected in questionnaires, such as Carver's BIS/BAS, [22] that are oftentimes used to test RST predictions. A variety of disparate experimental findings, originally viewed as inconsistent with Gray's Biopsychological theory, are more consistent with RST joint systems hypothesis. [1]

Renaming impulsivity

Smillie, Pickering, and Jackson (2006) advocated for renaming trait Impulsivity, which is associated with BAS in the revised RST, Extraversion. [31] Empirical tests find that Extraversion is a better predictor than Impulsivity of reward learning. [31] Some components of the BAS and reward learning are better explained by association with Extraversion, especially high positive affect, while the cortical arousal loop originally proposed to underlie BAS in Gray's theory is still tied most closely with Impulsivity. [3] [8] Regardless of the trait label, the authors point out that the RST did not develop as a theory to explain the personality constructs, Anxiety and Impulsivity. [31] Rather, the RST predicts associations between reinforcement sensitivity, motivation, and behavior. [3]

Applications

Workplace performance

Carver and White's 1994 BIS/BAS scales [22] were used to support the finding that employees high in BIS (avoidance motivation) show lower work performance and engagement, while employees high in BAS (approach motivation) show higher performance in rewarding situations only. [32] These measures are not based on the revised RST, and may confound fear and anxiety. Alternatively, the Jackson 5 has recently been validated as a measure of the revised RST and shows convergent validity with measures of fear and anxiety. [4] [5] The proposed fear (FFFS) subscale is associated with avoidance behaviors (example item: 'If approached by a suspicious stranger, I run away') while the anxiety (BIS) subscale includes social situations wherein reward and punishment stimuli result in conflict between approach and avoidance motivations (example item: 'I prefer to work on projects where I can prove my abilities to others'). Clark and Loxton (2011) used the Jackson 5 to investigate mediators between fear, psychological acceptance, and work engagement. [4] [5] Self-reported fear, not anxiety, best predicted psychological acceptance, and lower work performance in turn. [4] [5] Thus, current research aims to apply measures based on the revised RST to more accurately clarify relations between fear, anxiety, and job performance. [4]

Clinical research

The BIS and BAS sensitivities are associated with individual differences in positive and negative affect. [26] This association has been largely explored in clinical populations exhibiting extreme scores on BIS/BAS measures. In their 2009 review, Bijttebier and colleagues summarized studies showing that high BIS sensitivity is present in individuals with anxiety, depression, and anorexia nervosa, whereas low BIS sensitivity is associated with psychopathy. [27] Extremely high BAS sensitivity is characteristic of individuals with bipolar disorder, ADHD, and bulimia, while extremely low BAS often characterizes individuals with anhedonic depression. BIS and BAS may differentiate, as illustrated above, between sub-types of eating disorders and depression. [27] These findings are correlational, and causal mechanisms were not directly tested. Researchers in fields ranging from cognitive science to self-regulation and attention are using the RST to investigate causal mechanisms that underlie the relationship between personality traits and psychopathology. [1] [3] [27]

A study by Masuyama et al. suggests that treatment interventions, which increase trait resilience, may be helpful in decreasing depressive symptoms. [33] High BIS was found to correlate directly with stronger depressive symptoms, while high BAS was found to correlate directly with low depressive symptoms. [33] This confirmed results from previous studies. [33] The study tested trait resilience as a mediator and found that trait resilience correlates negatively with depression. [33] Therefore, high BAS leads to high trait resilience, which in turn leads to lower depressive symptoms. [33] High BIS leads to decreased trait resilience, which in turn leads to increased depressive symptoms. [33]

Some research shows that BIS and BAS levels may be useful in predicting onset of substance use disorders. Individuals with a stronger, more-sensitive BAS system correlated with early onset of substance use disorders. [34]

Levels of BIS and BAS can be used to predict levels of substance use. [35] Individuals with low BIS levels combined with high BAS levels showed activation patterns similar to activation patterns of heavy substance users in past studies. [35] Individuals with high BIS levels and low BAS levels showed patterns of expectancy activation similar to those of light or non-users. [35]

See also

Related Research Articles

In psychology, temperament broadly refers to consistent individual differences in behavior that are biologically based and are relatively independent of learning, system of values and attitudes.

In psychology, trait theory is an approach to the study of human personality. Trait theorists are primarily interested in the measurement of traits, which can be defined as habitual patterns of behavior, thought, and emotion. According to this perspective, traits are aspects of personality that are relatively stable over time, differ across individuals, are relatively consistent over situations, and influence behaviour. Traits are in contrast to states, which are more transitory dispositions.

<span class="mw-page-title-main">Arousal</span> State of being awoken

Arousal is the physiological and psychological state of being awoken or of sense organs stimulated to a point of perception. It involves activation of the ascending reticular activating system (ARAS) in the brain, which mediates wakefulness, the autonomic nervous system, and the endocrine system, leading to increased heart rate and blood pressure and a condition of sensory alertness, desire, mobility, and reactivity.

<span class="mw-page-title-main">Sensory processing sensitivity</span> Personality trait of highly sensitive people

Sensory processing sensitivity (SPS) is a temperamental or personality trait involving "an increased sensitivity of the central nervous system and a deeper cognitive processing of physical, social, and emotional stimuli". The trait is characterized by "a tendency to 'pause to check' in novel situations, greater sensitivity to subtle stimuli, and the engagement of deeper cognitive processing strategies for employing coping actions, all of which is driven by heightened emotional reactivity, both positive and negative".

<span class="mw-page-title-main">Curiosity</span> Quality related to inquisitive thinking

Curiosity is a quality related to inquisitive thinking such as exploration, investigation, and learning, evident in humans and animals. Curiosity is associated with all aspects of human development, from which derives the process of learning and desire to acquire knowledge and skill.

In psychology, the Eysenck Personality Questionnaire (EPQ) is a questionnaire to assess the personality traits of a person. It was devised by psychologists Hans Jürgen Eysenck and Sybil B. G. Eysenck.

In the study of psychology, neuroticism has been considered a fundamental personality trait. In the Big Five approach to personality trait theory, individuals with high scores for neuroticism are more likely than average to be moody and to experience such feelings as anxiety, worry, fear, anger, frustration, envy, jealousy, pessimism, guilt, depressed mood, and loneliness. Such people are thought to respond worse to stressors and are more likely to interpret ordinary situations, such as minor frustrations, as appearing hopelessly difficult. The responses can include maladaptive behaviors, such as dissociation, procrastination, substance use, etc., which aids in relieving the negative emotions and generating positive ones.

<span class="mw-page-title-main">Impulsivity</span> Tendency to act on a whim without considering consequences

In psychology, impulsivity is a tendency to act on a whim, displaying behavior characterized by little or no forethought, reflection, or consideration of the consequences. Impulsive actions are typically "poorly conceived, prematurely expressed, unduly risky, or inappropriate to the situation that often result in undesirable consequences," which imperil long-term goals and strategies for success. Impulsivity can be classified as a multifactorial construct. A functional variety of impulsivity has also been suggested, which involves action without much forethought in appropriate situations that can and does result in desirable consequences. "When such actions have positive outcomes, they tend not to be seen as signs of impulsivity, but as indicators of boldness, quickness, spontaneity, courageousness, or unconventionality." Thus, the construct of impulsivity includes at least two independent components: first, acting without an appropriate amount of deliberation, which may or may not be functional; and second, choosing short-term gains over long-term ones.

Psychoanalytic criminology is a method of studying crime and criminal behaviour that draws from Freudian psychoanalysis. This school of thought examines personality and the psyche for motive in crime. Other areas of interest are the fear of crime and the act of punishment.

In psychology, novelty seeking (NS) is a personality trait associated with exploratory activity in response to novel stimulation, impulsive decision making, extravagance in approach to reward cues, quick loss of temper, and avoidance of frustration. That is, Novelty seeking refers to the tendency to pursue new experiences with intense emotional sensations. It is a multifaceted behavioral construct that includes thrill seeking, novelty preference, risk taking, harm avoidance, and reward dependence. The novelty-seeking trait is considered a heritable tendency of individuals to take risks for the purpose of achieving stimulation and seeking new environments and situations that make their experiences more intense. This trait has been associated with the level of motive and excitement in response to novelty. Persons with high levels of novelty seeking have been described as more impulsive and disorderly than low novelty seekers and have a higher propensity to get involved in risky activities, such as starting to misuse drugs, engaging in risky sexual activities, and suffering accidental injuries. It is measured in the Tridimensional Personality Questionnaire as well as the later version Temperament and Character Inventory and is considered one of the temperament dimensions of personality. Like the other temperament dimensions, it has been found to be highly heritable. Another related term, Variety seeking or variety-seeking buying behavior describes a consumer's desire to search for alternative products even if she or he is satisfied with a current product. For example, someone may drink tea with lunch one day but choose orange juice the next day specifically to get something different. High NS has been suggested to be related to low dopaminergic activity.

<span class="mw-page-title-main">Reward dependence</span>

Reward dependence is characterized as a tendency to respond markedly to signals of reward, particularly to verbal signals of social approval, social support, and sentiment. When reward dependence levels deviate from normal we see the rise of several personality and addictive disorders.

Communibiology is a term referring to a research paradigm that emphasizes the "neurobiological foundations of human communication behavior". Communibiologists take the nature side of the nature versus nurture debate in communication development. The communibiological paradigm was developed by Beatty and McCroskey as an alternative to the nature side supporting social learning paradigm. They believe genetics to be far more important in the development of communication behavior than learning processes and the environment. These researchers do concede, however, that genetic factors are not the sole source of communication behavior. One accepted ratio is 20% influence of cultural, situational, or environmental stimuli and 80% influence of inborn, neurobiological structures on behavior.

<span class="mw-page-title-main">Extraversion and introversion</span> Personality trait

The trait of extraversion and introversion are a central dimension in some human personality theories. The terms introversion and extraversion were introduced into psychology by Carl Jung, though both the popular understanding and current psychological usage are not the same as Jung's original concept. Extraversion tends to be manifested in outgoing, talkative, energetic behavior, whereas introversion is manifested in more reflective and reserved behavior. Jung defined introversion as an "attitude-type characterised by orientation in life through subjective psychic contents", and extraversion as "an attitude-type characterised by concentration of interest on the external object".

Sensation seeking is a personality trait defined by the search for experiences and feelings, that are "varied, novel, rich and intense", and by the readiness to "take physical, social, legal, and financial risks for the sake of such experiences." Risk is not an essential part of the trait, as many activities associated with it are not risky. However, risk may be ignored, tolerated, or minimized and may even be considered to add to the excitement of the activity. The concept was developed by Marvin Zuckerman of the University of Delaware. In order to assess this trait he created a personality test called the Sensation Seeking Scale. This test assesses individual differences in terms of sensory stimulation preferences. So there are people who prefer a strong stimulation and display a behavior that manifests a greater desire for sensations and there are those who prefer a low sensory stimulation. The scale is a questionnaire designed to measure how much stimulation a person requires and the extent to which they enjoy the excitement. Zuckerman hypothesized that people who are high sensation seekers require a lot of stimulation to reach their Optimal Level of Arousal. When the stimulation or sensory input is not met, the person finds the experience unpleasant.

An addictive personality refers to a hypothesized set of personality traits that make an individual predisposed to developing addictions. This hypothesis states that there may be common personality traits observable in people suffering from addiction; however, the lack of a universally agreed upon definition has marked the research surrounding addictive personality. Addiction is a fairly broad term; it is most often associated with substance use disorders, but it can also be extended to cover a number of other compulsive behaviors, including sex, internet, television, gambling, food, and shopping. Within these categories of addiction a common diagnostic scale involves tolerance, withdrawal, and cravings. This is a fairly contentious topic, with many experts suggesting the term be retired due to a lack of cumulative evidence supporting the existence of addictive personality. It has been claimed that characteristics of personality attributed to addictive personality do not predict addiction, but rather can be the result of addiction. However, different personality traits have been linked to various types of addictive behaviors, suggesting that individual addictions may be associated with different personality profiles. The strongest consensus is that genetic factors play the largest role in determining a predisposition for addictive behaviors. Even then, however, genes play different roles in different types of addictions. Forty to seventy percent of the population variance in the expression of addictions can be explained by genetic factors.

The biopsychological theory of personality is a model of the general biological processes relevant for human psychology, behavior, and personality. The model, proposed by research psychologist Jeffrey Alan Gray in 1970, is well-supported by subsequent research and has general acceptance among professionals.

The alternative five model of personality is based on the claim that the structure of human personality traits is best explained by five broad factors called impulsive sensation seeking (ImpSS), neuroticism–anxiety (N-Anx), aggression–hostility (Agg-Host), sociability (Sy), and activity (Act). The model was developed by Marvin Zuckerman and colleagues as a rival to the well-known five factor model of personality traits and is based on the assumption that "basic" personality traits are those with a strong biological-evolutionary basis. One of the salient differences between these two models is that the alternative five model lacks any equivalent to the dimension called openness to experience in the five factor model.

The biological basis of personality it is the collection of brain systems and mechanisms that underlie human personality. Human neurobiology, especially as it relates to complex traits and behaviors, is not well understood, but research into the neuroanatomical and functional underpinnings of personality are an active field of research. Animal models of behavior, molecular biology, and brain imaging techniques have provided some insight into human personality, especially trait theories.

Activity-specific approach in temperament research is the theory related to a structure of temperament, i.e. how temperament traits can be classified and organized. This approach suggests:

Personality theories of addiction are psychological models that associate personality traits or modes of thinking with an individual's proclivity for developing an addiction. Models of addiction risk that have been proposed in psychology literature include an affect dysregulation model of positive and negative psychological affects, the reinforcement sensitivity theory model of impulsiveness and behavioral inhibition, and an impulsivity model of reward sensitization and impulsiveness.

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  33. 1 2 3 4 5 6 Masuyama, Akihiro; Kubo, Takahiro; Shinkawa, Hiroki; Sugawara, Daichi (2022-07-05). "The roles of trait and process resilience in relation of BIS/BAS and depressive symptoms among adolescents". PeerJ. 10: e13687. doi: 10.7717/peerj.13687 . ISSN   2167-8359. PMC   9266581 . PMID   35811812.
  34. ↑ Ganesh, Suhas; Kandasamy, Arun; Sahayaraj, UbaharaS; Benegal, Vivek (2018). "Behavioral activation and behavioral inhibition sensitivities in patients with substance use disorders: A study from India". Indian Journal of Psychiatry. 60 (3): 346–350. doi: 10.4103/psychiatry.IndianJPsychiatry_323_18 . ISSN   0019-5545. PMC   6201657 . PMID   30405263.
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