Weapon focus- Johnson and Scott


	Weapon focus- Johnson and Scott
	Advantages Steblay conducted a meta-analysis of studies concerning the weapon focus effect. it showed that the presence of a weapon reduces the chance of a witness correctly identifying the person holding the weapon. Loftus et al monitored eyewitness eye movements and found that the presence of a weapon causes attention to be drawn to it.	Disadvantages Field experiment-There is less control over extraneous variables that might bias the results. This makes it difficult for another researcher to replicate the study in exactly the same way. Field- may have guessed the aims of the study because the participants new that they were waiting to take part in an experiment.
	Evaluation

Steblay conducted a meta-analysis of studies concerning the weapon focus effect. it showed that the presence of a weapon reduces the chance of a witness correctly identifying the person holding the weapon.
Loftus et al monitored eyewitness eye movements and found that the presence of a weapon causes attention to be drawn to it.

Field experiment-There is less control over extraneous variables that might bias the results. This makes it difficult for another researcher to replicate the study in exactly the same way.
Field- may have guessed the aims of the study because the participants new that they were waiting to take part in an experiment.

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