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Three experiments evaluated whether the magnitude of the list-method directed forgetting effect is strength dependent. Throughout these studies, items were strengthened via operations thought to increase context strength (spaced presentations) or manipulations thought to increment the item strength without affecting the context strength (processing time and processing depth). The assumptions regarding which operations enhance item and context strength were based on the "one-shot" hypothesis of context storage (K. J. Malmberg & R. M. Shiffrin, 2005). The results revealed greater directed forgetting of strong items compared with weak items, but only when strength was varied via spaced presentations (Experiment 3). Equivalent directed forgetting was observed for strong and weak items when strengthening operations increased item strength without affecting the context strength (Experiments 1 and 2). These results supported the context hypothesis of directed forgetting (L. Sahakyan & C. M. Kelley, 2002).
The results revealed greater directed forgetting of strong items compared with weak items, but only when strength was varied via spaced presentations (Experiment 3).
a direct but modest Experiment 3 interaction without an independent replication of the critical effect
Replication outlook: fragile
Equivalent directed forgetting was observed for strong and weak items when strengthening operations increased item strength without affecting the context strength (Experiments 1 and 2).
equivalence is inferred from two nonsignificant interactions without formal equivalence testing or demonstrated sensitivity
These results supported the context hypothesis of directed forgetting (L. Sahakyan & C. M. Kelley, 2002).
the predicted qualitative dissociation is present, though the direct cross-experiment interaction is marginal
directed forgetting reduced the output order bias
a secondary output-percentile analysis in Experiment 3 lacks confirmation across the other experiments
Derived from the full evaluation — not a separate score.
Strengths
The one-shot hypothesis is used to predict differential directed forgetting after spacing, but not after deeper or longer processing. This creates a focused test rather than a descriptive comparison.
↳ Introduction, one-shot hypothesis and prediction paragraphs
The experiments use random assignment, counterbalancing, incidental encoding, and consistent Cue × Item Strength ANOVAs across three strengthening manipulations.
↳ Methods and Results, Experiments 1–3
The General Discussion reports output-percentile analyses motivated by Bäuml’s alternative account and compares the pattern across all three experiments.
↳ General Discussion, output-order analysis
Limitations
Experiments 1 and 2 report F<1 interactions and describe strong and weak items as equally forgettable, without an equivalence test or sensitivity analysis establishing what effect sizes were excluded.
↳ Results, Experiments 1 and 2
The direct Cue × Item Strength × Experiment comparison produces p=.06, limiting the strength of the inference that context strength explains the differing experimental patterns.
↳ General Discussion, cross-experiment ANOVA
All experiments use undergraduates from one institution performing incidental judgments on short noun lists, with no direct test in other populations or applied memory settings.
↳ Participants and Materials, Experiments 1–3
The three-experiment design creates a focused comparison among depth, processing time, and spacing, with consistent procedures and analyses supporting the central qualitative dissociation. The strongest direct result is the Cue × Item Strength interaction in Experiment 3, but its effect is modest and the corresponding cross-experiment interaction reaches only p=.06. Experiments 1 and 2 strengthen the pattern through replication across manipulations, yet their nonsignificant interactions do not formally establish equivalence. The paper is clearly organized and engages the output-order alternative, placing it solidly within the well-supported but not airtight quality band.
Nabu’s assessment, alongside the field’s view.
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Strong3.9
The study connects the one-shot context-storage hypothesis to directed forgetting through three strengthening manipulations and obtains the predicted qualitative pattern. The advance is limited by treating nonsignificant interactions in Experiments 1–2 as equivalence and by the marginal cross-experiment comparison.
These results supported the context hypothesis of directed forgetting.
Random assignment, within-list counterbalancing, incidental encoding, and matched Cue × Item Strength analyses provide a controlled test across three experiments. The absence of formal equivalence tests or prospective power justification limits inference from the null interactions.
However, there was no interaction (F < 1).
The paper follows a direct sequence from competing mechanisms to a testable prediction and experiment-specific results. Its main calibration shortfall is describing the pattern as fully consistent while the direct cross-experiment interaction reaches only p=.06.
The results of our experiments were fully consistent with these predictions.
The discussion engages context-change, retrieval-inhibition, selective-rehearsal, and output-order explanations and reports an additional output-percentile analysis. It only partly traces the marginal cross-experiment result and the limited final engagement with the inhibitory account into the certainty of its conclusion.
Although output biases could contribute to the LSE, the current results suggest that output biases may be driven by context strength.
Caveats4 of 4 checks
The reported sample sizes, degrees of freedom, means, and ANOVA structures are mutually coherent. Interpretation of the marginal cross-experiment interaction is somewhat stronger than its p=.06 result warrants.
The participant procedures and retrospective questioning are described, but no ethics-approval or consent declaration appears in the reported Methods. The omission is a reporting watch-out and does not establish that approval or consent was absent.
Flags: 0 declared / 5 total
22 of 23 checkable references verified
23 references in manuscript
No retraction notice found in Retraction Watch.
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Low2.4
Relevance does not apply because the article presents a fundamental question about memory mechanisms without identifying practitioners, organisations, or an operational decision context.
Three experiments evaluated whether the magnitude of the list-method directed forgetting effect is strength dependent.
The findings characterize a mechanism under controlled laboratory conditions but do not connect it to a deployable intervention or applied memory setting.
the list-method paradigm could provide a new tool for investigating the effects of context on memory
Three strengthening manipulations provide within-paradigm triangulation, but all experiments use undergraduates from one institution and short noun lists. Generalization to other populations and real-world memories is not tested.
undergraduates participated for course credit
The article links directed-forgetting research to SAM/REM and list-strength-effect research, creating a cumulative theoretical pathway. The modest Experiment 3 interaction and marginal cross-experiment test limit how decisively it redirects that program.
the list-method paradigm could provide a new tool for investigating the effects of context on memory
Lower confidence on Generalizability, Trajectory — domain match limited.
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