Elizabeth Loftus reported on research carried out by Johnson and Scott (1976) which investigated the weapon focus effect!
Participants heard a heated discussion in another room - in one condition; a man emerged from the room carrying a pen with his hands covered in grease. In the second condition; a man emerged carrying a knife with blood on his hands. When asked to identify the man from 50 photos, those who had seen the man with the pen gave a far more accurate recall than those who had seen the man with the knife.This suggests that anxiety created by the weapon somehow distracts witnesses' attention from other aspects of the incident.
- The study has good validity as participants were not aware that the study was staged.
- ETHICAL ISSUES - that some participants may have been exposed to stress at the sight of the knife.
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