The use of stimulus dimensions in judgement making in spider fearful and nonfearful individuals.

This study uses a multidimensional scaling approach to investigate the hypothesis that spider fearful individuals give priority to a threat-safety dimension when making judgments. The results show that when making judgments about stimuli, spider fearful individuals (1) placed significantly greater comparative weighting on a threat-relevant dimension than on a non-emotive dimension (colour), and (2) tended to rate threatening pairs of stimuli and safe pairs of stimuli as more similar than did the nonfearful group. This prioritised dimensional processing suggests a mechanism by which phobics can exhibit what initially appear to be paradoxical tendencies to give priority to both threat and safety information.