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. 2018 Dec 11;13(12):e0208595. doi: 10.1371/journal.pone.0208595

Table 2. Method of memory activation/life scripts and bump range.

Serial no. First Author/Year Method of memory activation/Instruction for life scripts* Range of bump
Important memories method
1 Berntsen, 2011 [107] Participants recalled the most positive event of their lives and the traumatic or negative event that currently troubles them the most Most positive event of lives: 20–29
2 Dickson, 2011 [68] In Study 2, participants recalled an especially positive event and an especially negative event, or a surprising positive event and a surprising negative event
In Study 4, participants recalled a highly expected event and a highly unexpected event. Participants also rated the emotional valence of both the highly expected and highly unexpected event they mentioned
Though the authors subsequently report the individual distributions for both the positive and negative expected and unexpected events, they also report the overall distributions, collapsed across positive and negative events; we report the bump in these overall distributions.
Especially Positive Event: 16–30
Surprising Positive Event: 16–30
Highly Expected Event: 16–30
Highly Unexpected Event: 16–30
3 Ece, 2014 [69] Life script task: ten most important events in an expected life course of a person in their culture
Autobiographical memory task: report 10 important personally experienced life events
Expected life events: 16–20, 21–25, and 26–30 years
Autobiographical memories: no reminiscence bump but clear childhood amnesia and recency effects
4 Fromholt, 2003 [73] Centenarians provided autobiographical memories to either a request for a life narrative or a request to produce AM to 15 word cues.
Experiment 1: 15-minute free narrative of life history following the instruction: “Tell about the events that have been important in your life”
Experiment 2: provide a specific, datable auto-biographical memory for 15 word cues (English translation: cat, cotton, fire, flag, flower, friend, money, morning, nail, picture, road, storm, sugar, ticket, and window).
15–30
5 Rubin, 2003 [33] Study 1: Memories for most afraid, most proud, most jealous, most in love, most angry, and most important event and whether this event was positive or negative
Study 2: Estimate 70-year-old men or women person’s age during each of a series of emotionally charged events
Study 1:
• Most positive important event: peaks in 20s
• Most angry: 13–19
• Most afraid: 20–29
Study 2:
• Most in love, Most important: 20–29
• Happiest, Proudest: 30–39
6 Svob, 2012 [100] Participants recalled and dated 10 important events from one of their parents’ lives Reminiscence bump related to parents’ age at the time of the recalled events = 20–30
Mini-bump from the time the participant was born up to the present = 40–50
7 Berntsen, 2002 [31] Participants were asked age of happiest, saddest, most traumatic, most important memory, and most recent involuntary memory Most important event: 20–29
Happiest event: 20–29
8 Leist, 2010 [91]
Life Events lists: Participants marked each negative and positive life event on the lists, if the event occurred
Functions of autobiographical memory, Time and Future Perspective Questionnaire
20–29
9 Rathbone, 2008 [93] All memories participants generated in association to “I am” statements:
• Study 1: 10 memories to each of three statements
• Study 2: 8 memories to each of four statements, as well as just the first three memories
All Memories: No Bump
First Three Memories: 20–40
10 Fromholt, 1991 [72] 15-minute free narrative of life history focusing on important events
10-item meta-memory questionnaire
10–30
11 Elnick, 1999 [70] A life history timeline and a description of three significant life events narrative
The Family APGAR
Bloom's Colorado Self-Report Measure of Family Functioning
Defense Styles Questionnaire
Modification of the Close Relationship Questionnaire
Self-Representations
Life history timeline: 20–29
Three significant life events narrative: 20–29
12 Fitzgerald, 1996 [35] Participants recalled four events that they would include in a book about their life 16–25
13 Glück, 2007 [22] Participants completed the Life Story Questionnaire, in which individuals list up to 15 events or experiences that they consider most personally important in their life 16–30
14 Alea, 2014 [59] 10 word cues: paper, pencil, child, hostage, seat, hospital, corpse, anxiety, candy, hammer
Life events questionnaire for 14 life events
Positive Memories: 6–15; 26–30
Negative Memories: 6–15; 26–30
Word and other cuing methods
15 Bohn, 2011 [60] Study 1: children wrote future life stories
Study 2: word cues to write down events from their future lives
Study 1:
• Life scripted events: 20–30
• Non-life scripted events: 20–30
Study 2: Life scripted events: 20–30
16 Chu, 2000 [61] 27 odor-related words 11–25
17 Conway, 1999 [62] Young and older groups of Bangladeshi participants recalled and dated autobiographical memories from across the lifespan in response to 15 word cues 10–30
Older adults 2nd bump: 35–55
18 Copeland, 2009 [64] Forgetting curves for information read in a 10-chapter novel where each chapter covered an approximately 10-year period in the life of the protagonist Novel summaries: 20s, 50s
Cued protagonist task:
• Chapter 3: 22 years
• Chapter 6: 50s
19 Koppel, 2016a [88] Word cuing method (10 word cues; i.e. money, water, child, clothing, church, woman, street, fire, kiss and city)
Important memories/important events method for three most important memories
Cue word method: 5–19
Important memories method: 20–29
20 Koppel, 2016b [89] Study 1: Seven word-cued and important autobiographical memories
Study 2: Seven word-cued and important autobiographical memories of a hypothetical 70-year-old
Study 1:
• Actual cue word method: 6–10
• Actual important memories method: 16–30
Study 2:
• Imagined cue word method: 6–25
• Imagined important memories method: 16–30
21 Maki, 2013 [114]
22 word cues (emotional, emotion-provoking, and neutral) Neutral cue words: 9–12
Emotion-provoking words: 17–21
Emotional cue words: No peak (8–30)
22 Rybash, 1999 [95] 18 Total words, with an unspecified combination of nouns, activity verbs, and affect terms
Authors collected remember/know ratings for each memory, and plotted the distributions separately for memories that received either remember, or know judgements
6–15
23 Schrauf, 1998 [96] Autobiographical memories to 50 word cues 10–30, 20–24, 34–35
24 Schuman, 2014 [17] A specific event from own life in response to eight word cues (e.g. flower, horse, fire, bird, lake, window, book, and friend)
Collective memories for national and world events rated important
Autobiographical memories: 5–20
Collective memories: 5–30
25 Fitzgerald, 1988 [24] Study 1: 40 word cues autobiographical memory task
Study 2: three flashbulb vivid memory descriptions
16–20
26 Haque, 2010 [75] Participants recalled the happiest event, saddest event, most important event, most traumatic event, most angry event, most in love event, most jealous event, most proud event, most fearful event, the event indicating the highest success, and the most surprising event of their lives Happiest Event: 20–29
Most Important Event: 20–29
Most in Love Event: 20–29
27 Jansari, 1996 [76] Experiment 1: participants recalled events freely or under instructions to avoid recent memories. (16 Nouns, 16 Activity Verbs, and 16 Affect Words)
Experiment 2: recall was constrained to particular life periods. (Participants recalled memory to sixteen word cues (6 nouns, 5 verbs, and 5 affect words) from)
6–15
28 Janssen, 2003 [77] 64 word cues 10–30
29 Janssen, 2005 [78] 10 word cues: recall and date autobiographical memories 15–25
Peaks: Men, 15–18; Women, 13–14
30 Janssen, 2008
[30]
10 word cues: describe the personal events that came to mind 6–19 (Overall)
Young adults: 8–12
Middle-aged adults: 6–16
Older adults: 7–20
31 Janssen, 2011 [81] Galton–Crovitz test: 64 word cues 4–21
32 Janssen, 2011 [82] 10 noun word cues 6–20
33 Kawasaki, 2011 [86]
Each participant received a random selection of 10 word cues out of 64 word cues Young adults: 5–13
Middle-aged adults: 6–15
34 Rubin, 1997 [15] 124 word cues
5 most important memories
10–29
35 Rubin, 1997 [16] 124 word cues for autobiographical memories 10–30
36 Wolf, 2016 [105] 39 word cues: nouns, verbs, and adjectives 10–20
37 Maki, 2006 [106] 9 nouns, 7 emotional words, and 6 emotion-provoking words 7–25
38 Schlagman, 2009 [109] Diary
Word cues (e.g. cabin, pipe, elephant, chest, silk, theatre, watch, whip, pillow, and giant)
10–30
39 Gidron, 2007 [74] Modified Autobiographical Memory Assessment: autobiographical memories to 4 groups of 16 word cues reflecting events from childhood, adolescence, adulthood and late age 10–25
40 Raffard, 2010 [108] Self-defining memories questionnaire: Participants recalled three self-defining memories Control: 20–24
Schizophrenia: 15–19
41 Raffard, 2009 [111] Self-defining memories questionnaire: Participants recalled three self-defining memories Schizophrenia: 15–19
Control: 20–24
42 Webster, 2007 [104] Described a vivid memory that “was important in your life, or that changed how you think about yourself” 20–29
Life Scripts
43 Berntsen, 2004 [32] Reanalysis of earlier studies on age norms
How old hypothetical centenarians were when they were most happy, most sad, most afraid, most in love, and had their most important and most traumatic experiences
Seven important events likely to occur in the life of a newborn
Positive events: 15–30
44 Erdoğan, 2008 [71] List the seven most important events a newborn or an elderly person would experience during his/her lifetime and estimate the prevalence, importance, age-at-event and emotional valence of each Study 1:
• Positive events: 20–30
• Negative events: 10–20
Study 2: Positive events: 20–30
45 Janssen, 2015 [84] Life script questionnaire (i.e., personal events; seven most important events expected to happen in a prototypical infant's life)
Modified version of the life script questionnaire (i.e., public events)
16–30
46 Koppel, 2014 [87] Study 1: probing cultural expectations for the expected timing of the public event that a typical person considers to be the most important of their lifetime
Study 2: probing cultural expectations for the expected timing of the objectively most important public event of a typical person’s lifetime
Study 1: 11–30
Study 2: 11–30
Peak: 16–20, 21–25
47 Tekcan, 2012 [101] Adolescents, young adults, and older adults listed the seven most important events that a typical newborn would experience in a lifetime Positive events: 30–39
Negative events for adolescents, young adults: 13–19
Other methods
48 Cappeliez, 2008 [9] Write in home dream diary for a week 15–25
49 Conway, 2005 [63] Participants were required to recall 20 specific AMs from their own lives 10–30
50 Davison, 2008 [65] A questionnaire in which 40-year-olds and senior adults described and dated up to five regrets for specific or general experiences Study 1: 10–19
Study 2, Participants in Their 40s: 20–29
Study 2, Participants in Their 60s: 20–29
51 Demiray, 2009 [66] Participants free-recalled autobiographical memories, and were given 7 min to retrieve as many memories as they could for each five-year interval in their life (e.g. from 20–25) 10–30
52 Denver, 2010 [67] Free recall flashbulb memories from personal lives, 9/11, and a personal flashbulb memory. Adapted version of the Memory Characteristics Questionnaire Study 1: 10–30
Study 2: 10–30
53 Holmes, 1999 [10] Participants free-recalled when they had learned public and private items of news Public Items: 10–19
Private items of news: 20–29
54 Rubin, 1998 [11] Factual, semantic, general-knowledge, multiple-choice questions about the Academy Awards, the World Series, and current events 10–30
55 Schroots, 2004 [110] Life-line Interview Method: Participants were asked to draw a life-line for both past and future events, and to date and label each event 10–40
56 Cuervo-lombard, 2007 [112] Participants recalled 20 specific autobiographical events during their lifetime Patients: 16–25
Controls: 21–25
57 Schrauf, 2001 [97] Hispanic adults who immigrated to the USA at ages 20–22, 24–28, and 34–35 narrated their life‐stories on twice, once in English and once in Spanish Early immigrators (ages 20, 21, 22) = 20–29
Middle immigrators (ages 24, 26, 28, 30) = 30–39
Late immigrators (ages 34, 35, 35) = 40–49
58 Steiner, 2014 [99] Novel interview: older adults provided oral life stories, and they divided their transcribed narratives into chapters 17–24
59 Thomsen, 2008 [102] Participants recalled the five events that they considered most central to their life story 6–30
60 Thomsen, 2011 [103] After dividing their life story into chapters, participants recalled an important specific memory from their most positive and most negative chapter, respectively Memory from the most positive chapter: 21–30
61 Krumhansl, 2013 [90] Young adults’ personal memories associated with top music hits over 5-and-a-half decades Unclear
62 Platz, 2015 [92]
Experiment 1: Participants listened to excerpts from 80 number-one, popular music hits from 1930 to 2010 and gave written self-reports on music-evoked autobiographical memories
Experiment 2: Other participants rated affective characteristics
15–24
63 Rathbone, 2017 [94] Memories related to top-grossing films and songs, selecting the five that were most personally significant Study 1: Personally significant films and songs, Songs: 15–19
Study 2: Songs, 10–14
Films: No Bump
64 Schubert, 2016 [98] Participants were asked to recall a single memorable musical event from “a time long ago” 13–14
65 Janssen, 2007 [79] Participants were asked to name their three favorite books, movies, and records and time period they first encountered them 16–20
66 Janssen, 2008 [80] Yearly News Memory Test (YNMT) 10–25
67 Janssen, 2012 [83] Participants were asked who they thought the five best players of all time were 11–30
68 Ju, 2016 [85] Reactions to nostalgic advertising 15–24

* For the ease of categorization, we have classified studies using more than one method of memory activation/instruction for life scripts under one method based upon the dominant method employed. The “Range of bump” column, however, illustrates ranges for all the methods utilized within each study despite the study’s location under the heading for the dominant method employed.

The range and location of the bump vary with respect to the method for activating different types of memories.