Frowd And Bruce - 2007

Question 1

Method

Answer 1

3 lab experiments

Question 2

Participants in exp1

Answer 2

30 staff and students from Stirling uni

Question 3

Participants in exp2

Answer 3

48 undergraduates at Stirling uni

Question 4

Participants in exp3

Answer 4

8 staff and students from Stirling uni

4 - compute science
4- psyc

Question 5

Procedure for exp1

Answer 5

The stimuli was target photographs of 10 Celebrities and 50 composites images produced by E-fit, pro fit, sketch and evo fit

• each face was clean shaven and spectacles were avoided
• 3 sets of composites was used
• ps were tested individually on 1 of the 3 conditions (IMD)
• asked to place a composite face in front of a celebrity face in their own time until task was complete

Question 6

Procedure for exp2

Answer 6

Used a photo array of photo line up with distracter faces and foils making it difficult

• faces and foils were made easy or hard
• the composites were then presented 1 at a time along with a photo array = ps had to pick out the celebrity face which matched
• composites were either internal or external features

Question 7

Procedure for exp3

Answer 7

Used as a control to check the validity of exp1+2

• familiar and unfamiliar faces - Computer science paid to creat composites of 8 ps

32 composites in total
54 witnesses from general public (Glasgow sci centre )
26 students from Stirling uni to repeat exp

Question 8

Results for exp 1

Answer 8

Whole composites and those of external features were sorted simm at approx 35% correct

The composites of internal features = 19.5% correct

Question 9

Results for exp2

Answer 9

Composites for external 42.5% were identified easier than internal features

24% this was consistent across all array types (whether easy or diff)

Question 10

Results for exp3

Answer 10

Overall accuracy - 57.7%
V. Familiar = 50%
V. Unfamiliar = 48.7%

External composites - 53.3%
Internal composites - 32.6%

Complete - 61.1%

Question 11

What was concluded here

Answer 11

This could indicate that there is something wrong about the internal features of a face which do not work well when trying to create a reconstruction

This effect holds true even when the face is familiar which sheds some doubt on previous research

Question 12

Aim

Answer 12

To investigate the relative recognisability of external features of a facial composite