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54 students in the third year of their psychology course at the University of Dundee took part. Their average age was 22.7 years, with the maximum age being 39 and the minimum being 19. 48 participants were right-handed, with the remaining 6 left-handed  

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Level 3 Practical for Dr. Martin FISCHER, October 2004 "NUMBER ESTIMATION" Matriculation No. 040012150 Abstract Previous studies have found evidence that suggests a numbers magnitude automatically activates the spatial representations associated with that magnitude and can influence our abilities to estimate and compare stimuli. They further suggest that internal, mental spatial representations are strongly linked to external, real world representations, and there is a sort of "mapping" from our internal to external worlds. To investigate these claims, this experiment tested whether there was a higher probability to answer longer for digit strings consisting of 9's compared to those consisting of 1's. Participants were presented firstly with a straight reference line followed by a string of digits consisting of either 1's or 9's, and asked to judge whether the strings were longer or shorter than the reference. Results showed that there was a significant tendency to answer longer when presented with strings containing 9's, which lead...

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