Unconscious thought theory (UTT) posits that the unconscious mind is capable of performing tasks outside of one's awareness, and that unconscious thought (UT) is better at solving complex tasks, where many variables are considered, than conscious thought (CT), but is outperformed by conscious thought in tasks with fewer variables. It was proposed by Ap Dijksterhuis [1] and Loran Nordgren [2] in 2006.
The theory is based primarily on findings from comparing subjects presented with a complex decision (for instance which of several apartments is the best?), and allowed either (1). very little time, (2). ample time, or (3), ample time but are distracted and thereby prevented from devoting conscious attentional resources to it. It is claimed that subjects unable to devote conscious processing to the task outperform both those who can spend time deliberating and those who must respond immediately. [3] Dijksterhuis and Nordgren interpreted these findings as strong support for the idea of UT being superior to CT, and used them in part to justify six principles distinguishing UT from CT.
This position runs counter to most research on unconscious processing conducted over the last 40 years, which has found unconscious processes to be characterized by simple responses, and to be incapable of complex operations. [4] Unconscious Thought Theory has come under stiff criticism from researchers unable to replicate the original effects. [5] [6] [7]
"When making a decision of minor importance, I have always found it advantageous to consider all the pros and cons. In vital matters however ... the decision should come from the unconscious, from somewhere within ourselves."
— Sigmund Freud, cited in Dijksterhuis (2004) [3]
Unconscious thought theory runs counter to decades of mainstream research on unconscious cognition (see Greenwald 1992 [4] for a review). Many of the attributes of unconscious thought according to UTT are drawn from research by George Miller and Guy Claxton on cognitive and social psychology, as well as from folk psychology; together these portray a formidable unconscious, possessing some abilities far beyond those of conscious thought. UTT is in this respect reminiscent of some classical views of the unconscious that emerged as far back as the early twentieth century. Both UTT and Freudian psychoanalytic theory hold that complex operations are performed by the unconscious, but where Freud's theory suggests that the unconscious represses harmful memories to protect one's ego, UTT's version of UT performs rational operations to complete unsolved cognitive or affective tasks. Helmholtz's theory of unconscious inference also shares UTT's view that the unconscious' reasoning mediates our interpretation of the world, but UTT differs from unconscious inference by its clear assertion that unconscious thought is a time-consuming process; Helmholtz's famous use of perception as an example of unconscious inference suggests that unconscious thought, for him, operates much more quickly. Probably the most striking contrast UTT has with today's understanding of the unconscious is that between its main claim and studies on implicit perception. [8] Researchers like Anthony Greenwald have used subliminal semantic activation tasks to evaluate unconscious thought by presenting words very quickly to prevent them from entering conscious thought. The unconscious' inability to process more than one word at a time has led these researchers to conclude that unconscious thought is unsophisticated. [4] But UTT holds that unconscious thought is very sophisticated, enjoying benefits like freedom from bias and the ability to integrate disparate pieces of information more efficiently than conscious thought.
Conscious thought is generally considered to lead to good decisions. However, because conscious thinking has a low capacity to process multiple factors, conscious thought on an issue will lead to a poorer decision when applied to complex issues. Conversely, unconscious thought is generally considered to lead to poor choices. However, “the quality of choice does not deteriorate with increased complexity,” [10] meaning unconscious thought actually leads to better decisions regarding complex issues. For example, when presented with complex information about 4 apartments, each with different desirability, individuals who were informed, then distracted, and finally asked to choose an apartment made better decisions than individuals who were asked to either choose immediately or think about it for some time and then choose. The individuals who were distracted before choosing an apartment engaged only in unconscious thought regarding the decision and made better decisions than those engaged in conscious thought. However, we wouldn't expect this trend to continue for a simpler decision. This is the basis for the deliberation-without-attention hypothesis: that quality of choice depends on the relation between mode of thought (conscious or unconscious) and the complexity of the choice. [10]
Researchers Ap Dijksterhuis, Maarten W. Bos, Loran F. Nordgren, and Rick B. van Baaren tested this hypothesis in a series of studies measuring choice quality and post-choice satisfaction after participants used conscious and unconscious deliberation.
The first study presented participants with information about 4 different cars, each with a different level of desirability. One group was presented with 4 attributes of each car (simple product) and the other group was presented with 12 attributes of each car (complex product). Within these groups, some individuals were asked to think about the car for 4 minutes and then make a choice (conscious thought) while the others were distracted for 4 minutes and then asked to make a choice (unconscious thought). Unconscious thought led to better decisions in the group evaluating a complex product, while conscious thought led to better decisions in the group evaluating a simple product, illustrating the deliberation-without-attention effect.
A second study evaluated post-choice satisfaction as it relates to conscious and unconscious thinkers. Shoppers from two stores were polled: IKEA (complex products) and Bijenkorf (simple products). These shoppers were asked as they left if they were aware of the product they purchased before going on the shopping trip and how much they thought about the product between seeing it for the first time and buying it. A few weeks later, the same shoppers were asked how satisfied they were with their purchase. Those who engaged in conscious thought were more satisfied with their purchases from Bijenkort (simple products) then those who engaged in unconscious thought. Conversely, those who engaged in unconscious thought were more satisfied with their purchases from IKEA (complex products) then those who engaged in conscious thought. Again, this illustrates the deliberation-without-attention effect, but outside of a laboratory setting.
Two other studies were also done as part of this research. Together, the studies supported the deliberation-without-attention effect: conscious thinkers were better able to make more desirable choices between simple products, but unconscious thinkers were better able to choose between complex products. Furthermore, after making a complex decision, conscious thinkers were less likely to be satisfied with their choice than unconscious thinkers. The researchers conclude by suggesting this effect could be generalized outside the world of consumers, perhaps proving applicable to political choices, managerial choices, etc. [10]
In light of the difference in capacity between CT and UT, Dijksterhuis used a series of five experiments to test two hypotheses about the decision-making process of unconscious thought. [3] The first hypothesis was that in complex decision making, being able to use UT will lead to better decisions than when one makes decisions immediately and is unable to use UT; the second was that when making complex decisions, users of only UT will outperform users of a combination of UT and CT.
The standard UTT experimental paradigm is as follows:
Using this method, Dijksterhuis found that subjects in the Distraction condition made better choices than either the Deliberation or Control conditions, and concluded that unconscious thought alone is superior to conscious thought for making complex decisions. He then published unconscious thought theory [11] with Loran Nordgren. [2]
The Unconscious Thought Principle asserts the existence and nature of two kinds of thought: conscious and unconscious. Conscious thought is defined as "object-relevant or task-relevant cognitive or affective thought processes that occur while the object or task is the focus of one's conscious attention", while unconscious thought simply occurs when the object or task is outside of attention. [11]
According to cognitive psychologist George Miller, one cannot hold more than seven items, plus or minus two, in conscious working memory; unconscious thought does not have this restriction. [12] UTT's Capacity Principle assumes this seven plus-or-minus-two rule to be true. [11]
Given its low capacity, conscious thought must use a "top-down" style of processing that uses shortcuts or schemas to work efficiently. Because its capacity is unbounded, unconscious thought instead uses a "bottom-up" style of processing that avoids schemas, integrating information efficiently and avoiding the bias that schemas might bring to conscious thought. [11]
Research by Timothy Wilson and Jonathan Schooler [13] demonstrated how deliberation between choice objects and introspecting on one's reasoning process results in poorer choice satisfaction than when one does not introspect. Combining this finding with Dijksterhuis' [3] that people also apparently make better decisions when distracted than when deliberating, Dijksterhuis and Nordgren [11] posited the Weighting Principle: that unconscious thought is better than conscious thought at appropriately weighting the relative importance of choice objects' attributes.
According to Guy Claxton, conscious thought employs rule-based thinking, following formal rules much like those of traditional logic, whereas unconscious thought instead uses associations that are either inherent or learned through experience, as in classical conditioning. In agreement with Claxton, the Rule Principle [11] holds that conscious thought follows stringent rules and is accordingly precise, whereas unconscious thought engages in associative processing. It is important to note that unconscious thought may conform to rules even though it does not follow them. That is, although the process used to generate an output unconsciously is different than the process used in conscious thought, unconscious thought's output may well be identical or similar to that of conscious thought.
When asked about the secret behind their brilliant work, Nobel Prize winners and famous artists have often cited incubation, saying that simply understanding the problem they wanted to solve and not paying mind to it somehow procured a solution. In addition to these introspective accounts, the Convergence Principle [11] cites experiments demonstrating the merits of unconscious thought in creativity [14] to suggest that conscious thought is focused and "convergent", using only information directly relevant to a goal or task, while unconscious thought is more "divergent", bringing to bear information that has less obvious relation to the goal or task at hand. In this way, long periods of unconscious thought precipitate ingenuity where conscious thought would stagnate.
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UTT has been challenged both on its very existence [6] [7] and, if it exists, on its generalizability. The scientific journal Judgment and Decision Making has published several studies over the years that fail to provide support for the unconscious thought theory.
The earliest meta-analysis of UTT, done by Acker, [15] found no support for the claim that UT is superior to CT in complex decision making.
In the largest analysis to date, examining all studies to-date and contributing a large-scale replication study (N = 399), Nieuwenstein et al. (2015) [7] stated that the "large-scale replication study yielded no evidence for the UTA, and the meta-analysis showed that previous reports of the UTA were confined to underpowered studies that used relatively small sample sizes." They concluded that
"There exists no reliable support for the claim that a momentary diversion of thought leads to better decision making than a period of deliberation."
Methodologically, Srinivasan et al. (2013) argued that periods of attentional processing occurring during an "unconscious" thought period may be critical for decision making. [16]
Other challenges to UTT have argued that it cannot incorporate relevant cognitive and social psychological knowledge, [17] that the suggestion given by Dijksterhuis to use UT for complex decisions is inappropriate in certain choice environments, [18] and offer alternative interpretations of Dijksterhuis' and his colleagues' findings. [19] [20]
It is known that unconscious thought can interpret single words or images, and that deliberating over a simple problem for too long can be disadvantageous. It remains unclear under what circumstances, if any, it is best to delegate decision problems to one's unconscious by diverting attention from them (see Payne, [18] Waroquier [19] and Srinivasan & Mukherjee [21] ), and to what extent logical, rule-based thought processes can occur outside of awareness. More fundamentally, it is still unknown what exactly happens neurologically when unconscious thought occurs, a more thorough understanding of which may inform those trying to prescribe unconscious or conscious thought. (Antonio Damasio's recent book on the neurology of reason, Descartes Error: Emotion, Reason, and the Human Brain, while not a discussion of consciousness, argues for the existence of an evolved interaction that takes place in normal brains between emotion – an unconscious process, distinct from the conscious experience of feeling – and conscious reasoning.)
In their most common sense, the terms thought and thinking refer to conscious cognitive processes that can happen independently of sensory stimulation. Their most paradigmatic forms are judging, reasoning, concept formation, problem solving, and deliberation. But other mental processes, like considering an idea, memory, or imagination, are also often included. These processes can happen internally independent of the sensory organs, unlike perception. But when understood in the widest sense, any mental event may be understood as a form of thinking, including perception and unconscious mental processes. In a slightly different sense, the term thought refers not to the mental processes themselves but to mental states or systems of ideas brought about by these processes.
A cognitive bias is a systematic pattern of deviation from norm or rationality in judgment. Individuals create their own "subjective reality" from their perception of the input. An individual's construction of reality, not the objective input, may dictate their behavior in the world. Thus, cognitive biases may sometimes lead to perceptual distortion, inaccurate judgment, illogical interpretation, and irrationality.
Blindsight is the ability of people who are cortically blind to respond to visual stimuli that they do not consciously see due to lesions in the primary visual cortex, also known as the striate cortex or Brodmann Area 17. The term was coined by Lawrence Weiskrantz and his colleagues in a paper published in a 1974 issue of Brain. A previous paper studying the discriminatory capacity of a cortically blind patient was published in Nature in 1973. The assumed existence of blindsight is controversial, with some arguing that it is merely degraded conscious vision.
Introspection is the examination of one's own conscious thoughts and feelings. In psychology, the process of introspection relies on the observation of one's mental state, while in a spiritual context it may refer to the examination of one's soul. Introspection is closely related to human self-reflection and self-discovery and is contrasted with external observation.
In psychoanalytic theory, a defence mechanism is an unconscious psychological operation that functions to protect a person from anxiety-producing thoughts and feelings related to internal conflicts and outer stressors.
A choice is the range of different things from which a being can choose. The arrival at a choice may incorporate motivators and models.
Agency is the capacity of an actor to act in a given environment. It is independent of the moral dimension, which is called moral agency.
The somatic marker hypothesis, formulated by Antonio Damasio and associated researchers, proposes that emotional processes guide behavior, particularly decision-making.
Choice-supportive bias or post-purchase rationalization is the tendency to retroactively ascribe positive attributes to an option one has selected and/or to demote the forgone options. It is part of cognitive science, and is a distinct cognitive bias that occurs once a decision is made. For example, if a person chooses option A instead of option B, they are likely to ignore or downplay the faults of option A while amplifying or ascribing new negative faults to option B. Conversely, they are also likely to notice and amplify the advantages of option A and not notice or de-emphasize those of option B.
In psychology, a dual process theory provides an account of how thought can arise in two different ways, or as a result of two different processes. Often, the two processes consist of an implicit (automatic), unconscious process and an explicit (controlled), conscious process. Verbalized explicit processes or attitudes and actions may change with persuasion or education; though implicit process or attitudes usually take a long amount of time to change with the forming of new habits. Dual process theories can be found in social, personality, cognitive, and clinical psychology. It has also been linked with economics via prospect theory and behavioral economics, and increasingly in sociology through cultural analysis.
Decision field theory (DFT) is a dynamic-cognitive approach to human decision making. It is a cognitive model that describes how people actually make decisions rather than a rational or normative theory that prescribes what people should or ought to do. It is also a dynamic model of decision making rather than a static model, because it describes how a person's preferences evolve across time until a decision is reached rather than assuming a fixed state of preference. The preference evolution process is mathematically represented as a stochastic process called a diffusion process. It is used to predict how humans make decisions under uncertainty, how decisions change under time pressure, and how choice context changes preferences. This model can be used to predict not only the choices that are made but also decision or response times.
The introspection illusion is a cognitive bias in which people wrongly think they have direct insight into the origins of their mental states, while treating others' introspections as unreliable. The illusion has been examined in psychological experiments, and suggested as a basis for biases in how people compare themselves to others. These experiments have been interpreted as suggesting that, rather than offering direct access to the processes underlying mental states, introspection is a process of construction and inference, much as people indirectly infer others' mental states from their behaviour.
Neuroscience of free will, a part of neurophilosophy, is the study of topics related to free will using neuroscience and the analysis of how findings from such studies may impact the free will debate.
Subliminal stimuli are any sensory stimuli below an individual's threshold for conscious perception, in contrast to supraliminal stimuli.
Unconscious cognition is the processing of perception, memory, learning, thought, and language without being aware of it.
The memory system plays a key role in the decision-making process because individuals constantly choose among alternative options. Due to the volume of decisions made, much of the decision-making process is unconscious and automatic. Information about how a decision is made is remembered and used for future decisions. Memory is susceptible to biases, but it is integral to the formation of preferences and to differentiation between choices.
Intuition in the context of decision-making is defined as a "non-sequential information-processing mode." It is distinct from insight and can be contrasted with the deliberative style of decision-making. Intuition can influence judgment through either emotion or cognition, and there has been some suggestion that it may be a means of bridging the two. Individuals use intuition and more deliberative decision-making styles interchangeably, but there has been some evidence that people tend to gravitate to one or the other style more naturally. People in a good mood gravitate toward intuitive styles, while people in a bad mood tend to become more deliberative. The specific ways in which intuition actually influences decisions remain poorly understood.
Automatic and controlled processes (ACP) are the two categories of cognitive processing. All cognitive processes fall into one or both of those two categories. The amounts of "processing power", attention, and effort a process requires is the primary factor used to determine whether it's a controlled or an automatic process. An automatic process is capable of occurring without the need for attention, and the awareness of the initiation or operation of the process, and without drawing upon general processing resources or interfering with other concurrent thought processes. Put simply, an automatic process is unintentional, involuntary, effortless, and occurring outside awareness. Controlled processes are defined as a process that is under the flexible, intentional control of the individual, that the individual is consciously aware of, and that are effortful and constrained by the amount of attentional resources available at the moment.
Social heuristics are simple decision making strategies that guide people's behavior and decisions in the social environment when time, information, or cognitive resources are scarce. Social environments tend to be characterised by complexity and uncertainty, and in order to simplify the decision-making process, people may use heuristics, which are decision making strategies that involve ignoring some information or relying on simple rules of thumb.
Albert Jan "Ap" Dijksterhuis is a Dutch Social Psychologist at Radboud University Nijmegen.