Dror 2006

• Procedure


  Context Was manipulated as the IV. Background info was provided by suing emotionally provoking photos. Task difficulty was manipulated. DV is number of matches made.
• Materials

  96 pairs of prints

  Half - bottom up information (ridge patterns...)

  Half - ambiguous/poorer quality - so allows for top down processes to have an effect -

  increases ecological validity. Two emotional states high and low. Dependent variable = number of matches made.
• Emotional context

  Description of crime + supporting photograph

  Emotional context + subliminal priming: words 'same' or 'guilt' flashed subliminally on the screen.
• Results

  unambiguous pairs - ppts unaffected by the emotional context (Top-down processes) manipulated by the study

  In the ambiguous pairs - the emotional context did significantly affect ppts matches.
• Conclusion

  They were affected by cognitive bias - the emotional context. Lisa Hall and Emma Player decided to do their own "in house' research on the Met police.