# Important numbers & statistics for Unit 1

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- Created by: Holly Jackson
- Created on: 08-05-15 19:01

What is the capacity of the short term memory?

7+/-2 bits of information

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What is the duration of the short term memory?

18-30 seconds

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In JACOBS study, what was the average number of digits recalled?

9.3 items

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In JACOBS study, what was the average number of letters recalled?

7.3 items

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In JACOBS study, what was the average score for 8-year-old children?

6.6 items

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In JACOBS' study, what was the average score for a 19-year-old?

8.6 items

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In PETERSON'S study, what were the time intervals tested?

3,6,9,12,15 or 18 seconds

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In PETERSON'S study, what was the % success rate at 3 seconds?

80%

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In PETERSON'S study, what was the % success rate at 6 seconds?

40%

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In PETERSON'S study, what was the % success rate at 18 seconds?

10%

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In BAHRICK'S study, how many p's were used?

392 ex-high school students

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In BAHRICK'S study, what was the range of time since p's had graduated?

2 weeks - 57 years

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In BAHRICK'S study, what was the % success rate after 15 years in the free recall?

60%

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In BAHRICK'S study, what was the % success rate after 35 years in the free recall?

30%

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In BAHRICK'S study, what was the % success rate after 15 years in the name recognition?

90%

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In BAHRICK'S study, what was the % success rate after 35 years in the name recognition?

70%

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In BAHRICK'S study, what was the % success rate after 15 years in the photo recognition?

90%

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In BAHRICK'S study, what was the % success rate after 35 years in the photo recognition?

80%

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In LOFTUS' study, how many photos were p's shown?

50

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In LOFTUS' study, what was the % success rate for the high anxiety condition?

33%

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In LOFTUS' study, what was the % success rate for the low anxiety condition?

49%

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In CHRISTIANSON & HUBINETTE'S study, how many p's were there?

58 real witnesses

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In CHRISTIANSON & HUBINETTE'S study, for how long afterwards did the eye witness testimonies stay accurate?

15 months

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In YUILLE & CUTSHALL'S study, how many p's were there?

13 witnesses

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In YUILLE & CUTSHALL'S study, for how long afterwards did the eye witness testimonies stay accurate?

4 months

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In LOFTUS & PALMER'S study, how many p's were used?

43 students

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In LOFTUS & PALMER'S study, how long did the clips last?

5-30 seconds

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In LOFTUS & PALMER'S study, how many clips were shown?

7 clips

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In LOFTUS & PALMER'S study, what was the average speed estimated when the word "smashed" was used?

40.8 mph

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In LOFTUS & PALMER'S study, what was the average speed estimated when the word "contacted" was used?

31.8 mph

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In LOFTUS & PALMER'S study, how many p's believed there was broken glass, when the word "smashed" was used?

16 out of 50

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In LOFTUS & PALMER'S study, how many p's believed there was broken glass, when the word "hit" was used?

7 out of 50

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In LOFTUS & PALMER'S study, how many p's in the control group believed there was broken glass?

6 out of 50

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In a META-ANALYSIS into cognitive interviews, how many studies were compared?

53 studies

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In a META-ANALYSIS into cognitive interviews, what was the difference in % recall?

34% increase

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In FISHER ET AL'S study, how many p's were used?

16 detectives

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In FISHER ET AL'S study, how many months were standard interviews recorded for?

4 months

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In FISHER ET AL'S study, how many standard interviews were collected?

88 interviews

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In FISHER ET AL'S study, how many training sessions did detectives attend and for how long?

4 x 1 hour sessions

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In FISHER ET AL'S study, what was the % change in the amount of accurate information obtained?

63% increase

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In AINSWORTH & BELL'S study, what % of US infants were securely attached?

70%

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In AINSWORTH & BELL'S study, what % of US infants had insecure avoidant attachments?

20%

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In AINSWORTH & BELL'S study, what % of US infants had insecure resistant attachments?

10%

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In IJZENDOORN & KROONENBURG'S meta-analysis, how many studies were used?

32 studies

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In IJZENDOORN & KROONENBURG'S meta-analysis, how many children were studied?

over 2000

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In IJZENDOORN & KROONENBURG'S meta-analysis, what was the difference between variation within culture and variation between cultures?

1.5 greater

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In IJZENDOORN & KROONENBURG'S meta-analysis, how many Japanese infants were securely attached?

68%

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In IJZENDOORN & KROONENBURG'S meta-analysis, how many West German infants, had insecure avoident attachments?

35%

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In BOWBLY'S study, how many thieves were interviewed?

44 thieves

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In BOWBLY'S study, how many thieves had suffered maternal deprivation?

over 50%

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In BOWBLY'S study, how many of the control group had suffered maternal deprivation?

only 2

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In BOWBLY'S study, how many thieves had been diagnosed affectionless psychopaths?

32%

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In BOWBLY'S study, how many of the control group had been diagnosed affectionless psychopaths?

none

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In HODGES & TIZARD'S study, how many children had been placed in an institution?

65 children

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In HODGES & TIZARD'S study, how many children had been rehomed by 4?

15 children

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In HODGES & TIZARD'S study, how many children had been adopted?

24 children

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In HODGES & TIZARD'S study, what ages were children studies at?

4,8 and 16 years old

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In HODGES & TIZARD'S study, what was the attrition?

40%

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In RUTTER ET AL'S study, how many orphans were studies?

100 Romanian orphans

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In RUTTER ET AL'S study, what ages were the children studies at?

4,6 and 11 years old

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In NICHD'S study, how many children were studied and how old were they?

over 1000 children, aged 5 years old

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In NICHD's study, how many times more likely were full time children to show behavioral problems than part time?

3 times more likely

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In BELSKY'S study, what % of children spending over 30 hours were aggressive towards peers?

17%

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In BELSKY'S study, what % of children spending under 10 hours were aggressive towards peers?

6%

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In SHEA'S study, how old were the children studied?

3-4 years old

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In SHEA'S study, how long did it last?

10 weeks

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## Other cards in this set

### Card 2

#### Front

What is the duration of the short term memory?

#### Back

18-30 seconds

### Card 3

#### Front

In JACOBS study, what was the average number of digits recalled?

#### Back

### Card 4

#### Front

In JACOBS study, what was the average number of letters recalled?

#### Back

### Card 5

#### Front

In JACOBS study, what was the average score for 8-year-old children?

#### Back

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