Guardia et al. Flashcards
aim
to investigate problems in judging body actions (deciding whether a body fits through a space) occurred only when judging ones own body or whether it was an overall judgement problem
ethics
given information sheet - informed consent
study approved by an independent ethics committee
participants
50 young females
25 with AN - avg. BMI 15.6
25 controls - avg BMI - 22.1
matched for age and educaiton
checked to ensure no perceptual problems
all students from Lille, France
procedure
51 openings of 30-80cm
- presented 4 times each
- opening reached the floor so it looked like a door
2 conditions for the procedure
first person perspective
third person perspective
first person perspective condition
could they walk through the door at a normal speed without turning sideways
judged whether their own body would fit through the opening
third person perspective condition
whether the experimenter could walk through the door without turning
could move to get a better view of the experimenter
facts about the experimenter
28 years old
52kg
stood 5.9m from projection
1.6m in height
38cm shoulder width
results
control groups had no difference between 1PP and 3PP
no significant difference in the mean perceptual ratios for the 3PP condition
mean perceptual ratios higher for the AN group than controls - 1.3 compared to 1.1
conclusions
control groups judgements were the same when judging their own or the experimenters possibility
AN significantly over estimated their own possibility in relation to the control group - they said they felt larger than they were - did not make these errors when judging the experimenters possibility
GRAVE
reliability -standardised procedure
ethics - informed consent
validity - quantitative data - good objectivity
validity - low ecological validity
generalisability - low as no males
how was a perceptualratio obtained
by dividing the perceived critical opening size by the shoulder width of the participant
