Loftus and Palmer Evaluation

Question 1

lab experiment: strengths

Answer 1

high control for extraneous variables- highly standardised procedures as videos all taken from the same angle so doesn’t largely effect speed estimate

Question 2

lab experiment: weaknesses

Answer 2

lack of ecological validity- as it wasn’t a real accident, there was a lack of emotional involvement which in a real scenario may effect perception of speed

Question 3

quantitative data: strengths

Answer 3

easy presentation and analysis of results- can draw easy conclusions from numerical data

Question 4

quantitative data: weaknesses

Answer 4

1. lack of insight toward why the speeds were estimated as they were- can be seen as superficial

Question 5

ethical considerations: weakness

Answer 5

1. informed consent not fully given- if it was, demand characteristics may have shown

Question 6

ecological validity: weakness

Answer 6

staged car accidents used which may alter how realistically memory is retained, as there is also a lack of emotional involvement which may be present in real life

Question 7

validity: strength

Answer 7

successfully measured in particular the effect of leading questions on memory, as different words led to different speed estimates

Question 8

reliability: strength

Answer 8

highly standardised procedure with clear set instructions, allowing experiment to be repeated

Question 9

sampling bias: strengths

Answer 9

1. easy to obtain ptcpts
2. time saving

Question 10

sampling bias: weaknesses

Answer 10

1. lack of population validity- ptcpts less likely to be drivers than majority of population due to age range
2. small sample