What was Brewer and Treyens (1981)'s procedure?
They used a sample of 86 university level psychology students. Participants were seated in a room made to look like an office- consisting of objects typical of offices such as calendars, paper, etc, and some objects that would not be expected in an office- such as a skull or toys. Some objects were not present in the office that would have been expected- such as books. After 35 seconds, the participants were called into another room and asked what they remembered from the 'office'.. Participants were randomly assigned to one of three conditions:
The recall condition- participants had to write a description for as many objects as they could remember 'from the office'. they were asked to 'write a description as if you were describing the room for someone who had never seen it'. Then they were given a verbal recognition test where they were given a booklet containing a list of objects- 61/131 of them in the room, and 70/131 not. they had to rate each item for how sure they were that it was in the room from 1-6 (6 being completely sure and 1 not at all).
The drawing condition- participants were given an outline of the room and were asked to draw as many items as they remembered.
The verbal recognition condition- participants were read a list of objects and were simply asked if they were in the room or not.
They were also given a questionnaire asking if the participants thought that they would be asked if they remembered the objects in the room. 93% said no.