Goetschalckx Lore, Moors Pieter, Wagemans Johan
a Laboratory of Experimental Psychology , University of Leuven Department of Brain and Cognition, Laboratory for Experimental Psychology , Leuven , Belgium.
Memory. 2018 May;26(5):581-588. doi: 10.1080/09658211.2017.1383435. Epub 2017 Oct 3.
You may find some images easier to remember than others. Recent studies of visual memory have found remarkable levels of consistency for this inter-item variability across observers, suggesting that memorability can be considered an intrinsic image property. The current study replicated and extended previous results, while adopting a more traditional visual long-term memory task with retention intervals of 20 min, one day, and one week, as opposed to the previously used repeat-detection task, which typically relied on short retention intervals (5 min). Our memorability rank scores show levels of consistency across observers in line with those reported in previous research. They correlate strongly with previous quantifications and appear stable over time. Furthermore, we show that the way consistency of memorability scores increases with the number of responses per image follows the Spearman-Brown formula. Interestingly, our results also seem to show an increase in consistency with an increase in retention interval. Supported by simulated data, this effect is attributed to a decrease of extraneous influences on recognition over time. Finally, we also provide evidence for a log-linear, rather than linear, decline of the raw memorability scores over time, with more memorable images declining less strongly.
你可能会发现有些图像比其他图像更容易记住。最近关于视觉记忆的研究发现，观察者之间这种项目间变异性的一致性水平非常显著，这表明可记忆性可被视为图像的一种内在属性。当前的研究重复并扩展了先前的结果，同时采用了一种更传统的视觉长期记忆任务，其保持间隔为20分钟、一天和一周，而不是先前使用的重复检测任务，后者通常依赖于较短的保持间隔（5分钟）。我们的可记忆性排名分数显示出观察者之间的一致性水平与先前研究报告的一致。它们与先前的量化结果高度相关，并且随着时间推移似乎保持稳定。此外，我们表明，可记忆性分数的一致性随每张图像反应数量增加的方式遵循斯皮尔曼 - 布朗公式。有趣的是，我们的结果似乎还表明，随着保持间隔的增加，一致性也会增加。在模拟数据的支持下，这种效应归因于随着时间推移对识别的外部影响减少。最后，我们还提供了证据，证明原始可记忆性分数随时间呈对数线性而非线性下降，更易记忆的图像下降幅度较小。
