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Postponed Plans: Prospective Memory and Intellectual Disability
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [sv]

Avhandlingen handlar om prospektivt minne (PM) hos personer med utvecklingsstörning. PM syftar på att formulera intentioner och genomföra dessa någon gång i framtiden, antingen inom en definierad tidsram eller i samband med en specifik händelse.

Frågeställningar:

1. Finns det en kvalitativ och kvantitativ skillnad mellan prospektivt minne hos personer med utvecklingsstörning och en kontrollgrupp? (Artikel I – II)

2. Hur ser sambandet mellan prospektivt minne, arbetsminne och episodiskt minne ut hos personer med utvecklingsstörning och, skiljer sig detta åt jämfört med kontrollgruppen? (Artikel II)

3. Vilka förutsättningar vid inkodning och hågkomst är kompatibla? (Artikel III)

4. På vilket sätt kan svag association mellan olika delar av information bidra till prospektiva minnesfel? (Artikel IV)

5. Går det att särskilja en hög- respektive lågpresterande grupp personer med utvecklingsstörning med avseende på prospektiv minnesprestation? (Artikel II)

Personer med utvecklingsstörning begår fler prospektiva minnesfel än personer i kontrollgruppen. Motsvarande gruppskillnad finns inte för självskattat minne. Prospektiv minnesprestation är bättre med bilder jämfört med ord som prospektiva ledtrådar, mest tydligt för personer med utvecklingsstörning. Arbetsminneskapacitet visade ett samband med både prospektivt minne och antalet falska minnen i kognitivt krävande situationer, till exempel, situationer med flera parallella prospektiva minnesuppgifter. Falska minnen och prospektivt minne hade ett samband hos personer med utvecklingsstörning. Att felaktigt känna igen bilder med bara delvis bekanta delar och att känna igen prospektiva ledtrådar utan att komma ihåg själva intentionen hade ett samband hos personer med utvecklingsstörning. Personer med utvecklingsstörning var också sämre än kontrollgruppen på att upprepa tidsintervall. Detta kan till exempel bero på bristande episodiskt minne och begränsade strategier för att lösa den här typen av uppgifter. Resultaten diskuteras i relation till träning av prospektivt minne och val av hjälpmedel.

Abstract [en]

This thesis deals with prospective memory (PM) in individuals with intellectual disability. The term refers to planning and executing actions that cannot be performed immediately and have to be stored in memory and retrieved either within a specified timeframe or to be associated with a specific event. Following research questions were explored:

1. Does prospective memory performance in the intellectual disability group differ quantitatively and qualitatively compared to a control group of individuals without intellectual disability? (Paper I – II)

2. What are the relations between prospective memory, working memory and episodic memory in individuals with intellectual disability, and how are these relations different from the relations found in individuals without intellectual disability? (Paper II)

3. What conditions constitute compatibility between encoding and retrieval of prospective memory tasks? (Paper III)

4. In what way might weak binding contribute to PM failure? (Paper IV)

5. Is it possible to identify high and low PM-performing groups of individuals with intellectual disability? (Paper II)

The results of the studies demonstrated that individuals with intellectual disability commit more PM errors than individuals in the control group, despite similarities in self-rated memory. Pictures as PM cues improved PM performance in comparison to words in both groups. This may be important primarily for recognition of the PM cue, particularly in the intellectual disability group. As to working memory capacity, it also shows a relation to both PM performance and binding performance in cognitively demanding situations (e.g., tasks with multiple parallel PM tasks). Furthermore, it was found that binding is related to PM performance in the intellectual disability group as there is a relationship between feature errors and recognition of cues, though not retrieving the correct intention. Finally, time reproduction was found to be weak in the intellectual disability group compared to the control group. This may be due to, for example, weak episodic memory and limited strategies for solving this type of task. These findings are discussed in relation to PM training and PM aids.

Place, publisher, year, edition, pages
Institutionen för beteendevetenskap och lärande , 2007.
Series
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 409Studies from the Swedish Institute for Disability Research, ISSN 1650-1128 ; 24
Keyword [en]
Pprospective memory, intellectual disability, working memory, episodic memory, time perception
Keyword [sv]
Prospektivt minne, utvecklingsstörning, arbetsminne, episodiskt minne, tidsuppfattning
National Category
Social Work
Identifiers
URN: urn:nbn:se:liu:diva-10382ISBN: 978-91-85895-57-1 (print)OAI: oai:DiVA.org:liu-10382DiVA: diva2:17136
Public defence
2007-11-30, Key 1, Hus Key, Campus Valla, Linköpings Universitet, Linköping, 13:00 (English)
Opponent
Supervisors
Available from: 2007-12-05 Created: 2007-12-05 Last updated: 2009-03-26
List of papers
1. Prospective memory, working memory, retrospective memory and self-rated memory performance in persons with intellectual disability
Open this publication in new window or tab >>Prospective memory, working memory, retrospective memory and self-rated memory performance in persons with intellectual disability
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2008 (English)In: Scandinavian Journal of Disability Research, ISSN 1501-7419, E-ISSN 1745-3011, Vol. 10, no 3, 147-165 p.Article in journal (Refereed) Published
Abstract [en]

The purpose of the present study was to examine the relationship between prospective memory, working memory, retrospective memory and self-rated memory capacity in adults with and without intellectual disability. Prospective memory was investigated by means of a picture-based task. Working memory was measured as performance on span tasks. Retrospective memory was scored as recall of subject performed tasks. Self-ratings of memory performance were based on the prospective and retrospective memory questionnaire. Individuals with intellectual disability performed at a lower level on most tasks and the task performances were to a higher degree correlated compared to persons without intellectual disability. The groups did not differ in self-rated memory scores. Distinct prospective memory cues (pictures, compared to words) were essential for prospective memory performance in persons with intellectual disability. The results are discussed with respect to how working memory capacity relates to prospective memory and retrospective memory performance.

Keyword
Prospective memory, working memory, intellectual disability, self-rated memory, retrospective memory
National Category
Social Sciences
Identifiers
urn:nbn:se:liu:diva-12827 (URN)10.1080/15017410802144444 (DOI)
Available from: 2007-12-05 Created: 2007-12-05 Last updated: 2017-08-27
2. Prospective memory, working memory, retrospective memory and self-rated memory performance in individuals with and without intellectual disability
Open this publication in new window or tab >>Prospective memory, working memory, retrospective memory and self-rated memory performance in individuals with and without intellectual disability
Show others...
Manuscript (Other academic)
Identifiers
urn:nbn:se:liu:diva-12828 (URN)
Available from: 2007-12-05 Created: 2007-12-05 Last updated: 2010-01-13
3. Compatibility between encoding and execution of prospective memory in individuals with intellectual disability
Open this publication in new window or tab >>Compatibility between encoding and execution of prospective memory in individuals with intellectual disability
Manuscript (Other academic)
Identifiers
urn:nbn:se:liu:diva-12829 (URN)
Available from: 2007-12-05 Created: 2007-12-05 Last updated: 2010-01-13
4. Prospective Memory and Binding in Individuals with Intellectual Disability
Open this publication in new window or tab >>Prospective Memory and Binding in Individuals with Intellectual Disability
Manuscript (Other academic)
Identifiers
urn:nbn:se:liu:diva-12830 (URN)
Available from: 2007-12-05 Created: 2007-12-05 Last updated: 2010-01-13

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Levén, Anna

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