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Memory. 2017 Feb;25(2):146-163. doi: 10.1080/09658211.2016.1260747. Epub 2016 Nov 28.

A mega-analysis of memory reports from eight peer-reviewed false memory implantation studies.

Author information

1
a Department of Psychology , University of Windsor , Windsor , ON , Canada.
2
b Department of Psychology , University of Warwick , Coventry , UK.
3
c Department of Psychology , University of Victoria , Victoria , BC , Canada.
4
d Department of Psychological Sciences , Kent State University , Kent , OH , USA.
5
e Department of Psychology, John Jay College of Criminal Justice , City University of New York , New York , NY , USA.
6
f Department of Psychology , University of Portsmouth , Portsmouth , UK.
7
g Department of Psychology , Western Washington University , Bellingham , WA , USA.

Abstract

Understanding that suggestive practices can promote false beliefs and false memories for childhood events is important in many settings (e.g., psychotherapeutic, medical, and legal). The generalisability of findings from memory implantation studies has been questioned due to variability in estimates across studies. Such variability is partly due to false memories having been operationalised differently across studies and to differences in memory induction techniques. We explored ways of defining false memory based on memory science and developed a reliable coding system that we applied to reports from eight published implantation studies (N = 423). Independent raters coded transcripts using seven criteria: accepting the suggestion, elaboration beyond the suggestion, imagery, coherence, emotion, memory statements, and not rejecting the suggestion. Using this scheme, 30.4% of cases were classified as false memories and another 23% were classified as having accepted the event to some degree. When the suggestion included self-relevant information, an imagination procedure, and was not accompanied by a photo depicting the event, the memory formation rate was 46.1%. Our research demonstrates a useful procedure for systematically combining data that are not amenable to meta-analysis, and provides the most valid estimate of false memory formation and associated moderating factors within the implantation literature to date.

KEYWORDS:

False memory; mega-analysis; suggestion

PMID:
27892833
DOI:
10.1080/09658211.2016.1260747
[Indexed for MEDLINE]

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