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Power of the subconscious in human fear revealed

Date:
January 18, 2012
Source:
University of Exeter
Summary:
The human subconscious has a bigger impact than previously thought on how we respond to danger, according to new research. This new study shows that our primitive response to fear can contradict our conscious assessment of danger.

The human subconscious has a bigger impact than previously thought on how we respond to danger, according to research led by the University of Exeter.

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The new study shows that our primitive response to fear can contradict our conscious assessment of danger.

The findings have implications for how anxiety disorders, such as phobias, are treated. The research also suggests we share a primitive response to fear with other animals, despite being able to consciously anticipate and assess danger.

Participants recruited to the study sat in front of a screen, on which a coloured shape sometimes appeared. Half the time, the image was accompanied by a mild electric shock. For the rest of the time, the image appeared but no shock was given.

During the trial they were asked to rate whether or not they expected a shock to be given and their 'skin conductance' was monitored. This technique measures the variation in the electrical activity of the sweat glands in the skin, which is an indication of the state of arousal of the sympathetic nervous system. In other words, it gives us a reading of a person's emotional state.

Following a series of trials involving shocks, participants were more likely to predict they would not receive a shock when the image was next shown. The complementary result was that they generally anticipated receiving a shock if they had not had one for the last few images. This phenomenon of expecting good luck after a run of bad luck and vice versa, is known as the 'gambler's fallacy'.

The skin conductance responses revealed the opposite pattern. Following a series of shocks accompanying the image, their physical responses to the next image shown suggested participants were more likely to expect another shock, but that they were less likely to expect a shock after a run of no-shock trials. This pattern of responding is consistent with 'associative learning': associating a visual cue with a significant event, a phenomenon that is well known in animals.

Previously it has been thought that, when using this type of procedure, humans respond differently from animals because we rely on conscious reasoning, rather than associative learning to generate our expectations. This study suggests that, despite our sophisticated mental capabilities, our responses are in fact driven by these more primitive processes when in danger.

Lead author, Professor Ian McLaren of Psychology at the University of Exeter said: "This research clearly shows that, in these circumstances, our reaction to a fear-provoking stimulus depends on a primitive response caused by associative learning. This is something we share with other animals.

"This could have important practical implications. Now that we know that associative processes are implicated in our response to fear-inducing stimuli, we need to consider the implications for the ways in which we treat anxiety and phobias."

This study, by a team from the University of Exeter and Canterbury Christchurch University, is published in the Journal of Experimental Psychology: Animal Behaviour Processes. The research was supported by a Doctoral Training Studentship from the ESRC.


Story Source:

The above story is based on materials provided by University of Exeter. Note: Materials may be edited for content and length.


Journal Reference:

  1. Andy J. Wills, Steven Graham, Zhisheng Koh, Ian P. L. McLaren, Matthew D. Rolland. Effects of concurrent load on feature- and rule-based generalization in human contingency learning.. Journal of Experimental Psychology: Animal Behavior Processes, 2011; 37 (3): 308 DOI: 10.1037/a0023120

Cite This Page:

University of Exeter. "Power of the subconscious in human fear revealed." ScienceDaily. ScienceDaily, 18 January 2012. <www.sciencedaily.com/releases/2012/01/120118101538.htm>.
University of Exeter. (2012, January 18). Power of the subconscious in human fear revealed. ScienceDaily. Retrieved April 24, 2015 from www.sciencedaily.com/releases/2012/01/120118101538.htm
University of Exeter. "Power of the subconscious in human fear revealed." ScienceDaily. www.sciencedaily.com/releases/2012/01/120118101538.htm (accessed April 24, 2015).

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