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Increased Direct Retrieval of Overgeneral Categoric Memory in Individuals with Dysphoria and a History of Major Depression

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Abstract

Increased overgeneral categoric memory has been reported in individuals with dysphoria and a history of depression. In three experiments, we examined whether increased categoric memory among individuals with depression occurs through generative or direct retrieval. Generative retrieval requires effort or additional information until the end of retrieval; direct retrieval occurs without such effort or information. Participants completed the Autobiographical Memory Test with minimal instructions and were asked whether each retrieval was generative or direct. Depressive symptoms were assessed using a self-reported scale and structured interview. Across three studies, we found that individuals with dysphoria and a history of depression reported high proportions of categoric memory via direct retrieval for negative cues. In addition, Study 3 showed that trait dysfunctional schema predicts direct retrieval of categoric memory for negative cues. We suggest that direct retrieval of categoric memory could indicate depression vulnerability. Decomposing the overgeneral memory (OGM) will help us gain a better understanding of the association between OGM and its negative outcomes.

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Notes

  1. A one-factor model of OGM was proposed which claimed that OGM occurs independently of cue valence (Griffith et al. 2009, 2012a; Takano et al. 2017). Our prediction that increased categoric memory could be obtained only in negative cues appears to contradict this one-factor model. We believe that the OGM originating from the low executive control surely occurs regardless of cue valence. Functional avoidance and memory suppression generally occur in negative memory, but if they become too generalized, OGM may occur regardless of cue valence (Williams et al. 2007; see also Hulbert et al. 2016, who implied the generalization of memory suppression). However, we believe that OGM induced by depressogenic processing and dysfunctional schema is biased to negative tendency. The AMT traditional instruction (Williams and Broadbent 1986) should approach a one-factor model because this instruction strongly reflects executive control in that it forces the retrieval of specific memories (see Discussion in Matsumoto and Mochizuki 2019). However, when minimal instruction, which is an instruction that more easily reflects schema-based direct retrieval rather than generative retrieval under the monitoring of executive control, is applied to individuals with depression, a 2-factor model may be established. The 2-factor model also indicates adaptation when minimal instruction is used for undergraduate students (Griffith et al. 2009; Takano et al. 2017) or traditional instruction is used for participants who experienced childhood abuse (Griffith et al. 2012a). In future studies, it may be an interesting idea to examine the factor structure of minimal instruction in consideration of depression and traumatic experiences.

  2. We also performed hypothesis-driven analyses. One-way ANOVA was performed to determine the proportion of categoric memories recalled via direct retrieval in response to negative cues and showed a significant group difference (F (2, 81) = 4.32, p = .017, partial η2 = .10). A multiple comparisons analysis showed that the past MDE group produced more categoric memories than the healthy control group (t = 2.74, p = .007, d = 0.78) and the matched control group (t = 2.55, p = .013, d = 0.72). These results supported our hypothesis.

  3. Although direct retrieval of categoric memory was observed regardless of cue valence, this result is difficult to interpret using the one-factor model of OGM (Griffith et al. 2009). This is because the impairment of executive control or functional avoidance, which may be the basis of the one-factor model, causes the attenuation of generation retrieval but does not contribute much to direct retrieval (Eade et al. 2006; Watson et al. 2013; Williams et al. 1999).

  4. As in Study 2, individuals with current and past depression were more likely than the general population because they were encouraged to join the studies.

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Acknowledgements

We acknowledge our research assistants, Risa Matsumoto and Emiko Ishikawa, for helping us to collect the data.

Funding

This study was supported by Grant Number 17J04080 from the Japan Society for the Promotion of Science.

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Contributions

All authors contributed to the study conception and design. Materials were prepared by NM. Data collection and analysis were performed by NM and YT. The first draft of the manuscript was written by NM and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Noboru Matsumoto.

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The authors declare that they have no conflicts of interest.

Ethical Approval

All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Appendix (Instructions for Distinguishing Generative and Direct Retrieval)

Appendix (Instructions for Distinguishing Generative and Direct Retrieval)

When we recall our memories, a memory may come to mind automatically without any effort. For example, when a cue word “small” is presented, the memory that “the psychology experiment was conducted in a small laboratory yesterday” is immediately recalled, or the memory that “every psychology class is held in a small classroom” is immediately recalled.

However, sometimes we must consciously expend some effort and/or use additional information to recall memories. For example, we must recall “small place” from the cue word “small” and then subsequently recall “small classroom” from the phrase “small place” and “class yesterday” or “every psychology class in a small classroom” from “small classroom”.

In this task, after the recall of a memory, we ask you to determine whether you recalled a memory immediately without effort or consciously with effort.

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Matsumoto, N., Takahashi, Y. & Kawaguchi, J. Increased Direct Retrieval of Overgeneral Categoric Memory in Individuals with Dysphoria and a History of Major Depression. Cogn Ther Res 44, 483–498 (2020). https://doi.org/10.1007/s10608-020-10079-3

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