cog and crim practical

Question 1

aim

Answer 1

to investigate the effect of reconstructive memory and memory decay on an EW recall when ppts had a time delay in between reporting an incident

Question 2

IV

Answer 2

amount of time between witnessing the stabbing incident on a video and recall
ca: immediate recall after seeing the video of stabbing
cb: recall after time delay 7 days

Question 3

DV

Answer 3

memory recall of stabbing immediately and after the week time delay- amount of correctly answered q on a cued recall (fixed responses) memory test based around the event of 10 q
and free recall

Question 4

alternate hypothesis

Answer 4

there will be a significant difference in the amount of of correctly answered q (out of 10) in a cued recall about a video of a stabbing incident when recall is immediate compared to recall a week later

Question 5

null hypothesis

Answer 5

there will be no significant difference in the amount of correctly answered q out of 10 in a cued recall about a video of a stabbing incident when recall is immediately done compared to recall a week later using a fixed 10 q questionnaire on incident

Question 6

what sampling technique was used

Answer 6

opportunity sampling- psych students available 17-18, 3m and 15f

Question 7

strength of sampling technique

Answer 7

easy and convenient- class of psychology students who were available at the time to watch video and answer questionnaire on details of the video and crime

Question 8

weakness of sampling technique

Answer 8

uses psych students aged 17-19
biased as teenagers have better memories than older people and used to being regularly tested so findings can be generalised to wider population

Question 9

procedure

Answer 9

initially ppts informed they would be shown a video about an incident- instructed to watch video and complete questionnaire on the clip
all sat on a desk to themselves and watched w/o any distractions
video lasted 2.09 minutes from BBC documentry covering EWT
the instructed to complete questionnaire of 10 fixed q in silence and analysed through bar graph and wiloxon signed ranks

Question 10

quantitative results

Answer 10

mean on 1st q= 8.28, 2nd = 7.94
range is 5
calculated value of 16.6 wasn’t smaller than 13 critical value so not sig so null hypothesis is accepted so mmeory doesn’t change over time

Question 11

s of practical

Answer 11

high in validity - controls
high in reliability - standardised procedures

Question 12

w of practical

Answer 12

low in generalisability- 18 psych students etc
low in eco validity - video not actual

Question 13

1 improvements

Answer 13

sample size, more accurate crime scene eg robbery in refectory