The limited-capacity hypothesis: Effects of sequence length and instructions in free recall

Abstract A hallmark of working memory (WM) is its limited capacity. While visual and verbal domains of WM are able to store multiple items, the capacity of parametric vibrotactile WM (vtWM) has not yet been established for supra-threshold, one-dimensional sensory vibrotactile frequencies. The present study extends the standard delayed match-to-sample vibrotactile discrimination task to determine the capacity of the vtWM and its cognitive mechanism. Here, by presenting subjects with 2 to 6 vibratory frequencies sequentially in each trial, the present study demonstrates that it is possible to retain about only two vibrotactile frequencies information in vtWM. The results also showed that the capacity of vtWM does not depend on whether sequentially presented vibrotactile frequencies are delivered to the same or to different fingers. At the same time, the rate of correct report depends on sequence length and when in the sequence the stimuli are presented, suggesting the dynamic updating of vtWM similar to that of visual WM.

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The capacity and cognitive processing of vibrotactile working memory for frequency

Current Psychology ◽

10.1007/s12144-021-02212-6 ◽

2021 ◽

Author(s):

Chundi Wang ◽

Hu Deng ◽

Yu Dong ◽

Xuemin Zhang ◽

Da-Hui Wang

Keyword(s):

Working Memory ◽

Cognitive Processing ◽

Discrimination Task ◽

Sequence Length ◽

Limited Capacity ◽

One Dimensional ◽

Cognitive Mechanism ◽

Match To Sample ◽

Dynamic Updating

AbstractA hallmark of working memory (WM) is its limited capacity. While visual and verbal domains of WM are able to store multiple items, the capacity of parametric vibrotactile WM (vtWM) has not yet been established for supra-threshold, one-dimensional sensory vibrotactile frequencies. The present study extends the standard delayed match-to-sample vibrotactile discrimination task to determine the capacity of the vtWM and its cognitive mechanism. Here, by presenting subjects with 2 to 6 vibratory frequencies sequentially in each trial, the present study demonstrates that it is possible to retain about only two vibrotactile frequencies information in vtWM. The results also showed that the capacity of vtWM does not depend on whether sequentially presented vibrotactile frequencies are delivered to the same or to different fingers. At the same time, the rate of correct report depends on sequence length and when in the sequence the stimuli are presented, suggesting the dynamic updating of vtWM similar to that of visual WM.

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Die Entwicklung des strategischen Gedächtnisses im Laufe der Grundschulzeit

Zeitschrift für Entwicklungspsychologie und Pädagogische Psychologie ◽

10.1026/0049-8637.41.1.1 ◽

2009 ◽

Vol 41 (1) ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Michael Hünnerkopf ◽

Veronika Kron-Sperl ◽

Wolfgang Schneider

Keyword(s):

Free Recall ◽

Serial Learning

Zusammenfassung. Es werden Ergebnisse der Würzburger Längsschnittstudie dargestellt, in der der Entwicklungsverlauf des strategischen Gedächtnisses vom letzten Kindergartenjahr bis zum Ende der vierten Klasse in halbjährigem Abstand untersucht wurde. Für eine Stichprobe von ca. 100 Kindern konnte das in der Münchner LOGIK-Studie gefundene Muster des sprunghaften Strategieerwerbs für die Sortierstrategie bestätigt werden, während sich bei der Wiederholungsstrategie kein bedeutsamer Unterschied in der Art des Strategieerwerbs zeigte. Der kombinierte Gebrauch von Sortier- und Wiederholungsstrategie brachte Vorteile bei der Abrufleistung der Sort-Recall-Aufgabe, nicht aber der Serial Learning-Free-Recall-Aufgabe. Für zukünftige Forschungsarbeiten wird der Einsatz einer Aufgabe zur Untersuchung der Strategieentwicklung empfohlen.

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Limitations to the Spacing Effect

Experimental Psychology (formerly Zeitschrift für Experimentelle Psychologie) ◽

10.1027/1618-3169.52.4.257 ◽

2005 ◽

Vol 52 (4) ◽

pp. 257-263 ◽

Cited By ~ 22

Author(s):

Peter P. J. L. Verkoeijen ◽

Remy M. J. P. Rikers ◽

Henk G. Schmidt

Keyword(s):

Free Recall ◽

Phase Retrieval ◽

Incidental Learning ◽

Factor Model ◽

Recall Performance ◽

Spacing Effect ◽

Word List ◽

Intentional Learning ◽

Study Phase ◽

Learning Condition

Abstract. The spacing effect refers to the finding that memory for repeated items improves when the interrepetition interval increases. To explain the spacing effect in free-recall tasks, a two-factor model has been put forward that combines mechanisms of contextual variability and study-phase retrieval (e.g., Raaijmakers, 2003 ; Verkoeijen, Rikers, & Schmidt, 2004 ). An important, yet untested, implication of this model is that free recall of repetitions should follow an inverted u-shaped relationship with interrepetition spacing. To demonstrate the suggested relationship an experiment was conducted. Participants studied a word list, consisting of items repeated at different interrepetition intervals, either under incidental or under intentional learning instructions. Subsequently, participants received a free-recall test. The results revealed an inverted u-shaped relationship between free recall and interrepetition spacing in both the incidental-learning condition and the intentional-learning condition. Moreover, for intentionally learned repetitions, the maximum free-recall performance was located at a longer interrepetition interval than for incidentally learned repetitions. These findings are interpreted in terms of the two-factor model of spacing effects in free-recall tasks.

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Articulatory Rehearsal Is More Than Refreshing Memory Traces

Experimental Psychology (formerly Zeitschrift für Experimentelle Psychologie) ◽

10.1027/1618-3169/a000179 ◽

2013 ◽

Vol 60 (2) ◽

pp. 131-139 ◽

Cited By ~ 1

Author(s):

Ryoji Nishiyama ◽

Jun Ukita

Keyword(s):

Free Recall ◽

Recall Performance ◽

Verbal Working Memory ◽

Verbal Information ◽

Free Recall Task ◽

Study Item ◽

Phonological Representations ◽

Memory Traces ◽

Short Period ◽

Serial Position Curves

This study examined whether additional articulatory rehearsal induced temporary durability of phonological representations, using a 10-s delayed nonword free recall task. Three experiments demonstrated that cumulative rehearsal between the offset of the last study item and the start of the filled delay (Experiments 1 and 3) and a fixed rehearsal of the immediate item during the subsequent interstimulus interval (Experiments 2 and 3) improved free recall performance. These results suggest that an additional rehearsal helps to stabilize phonological representations for a short period. Furthermore, the analyses of serial position curves suggested that the frequency of the articulation affected the durability of the phonological representation. The significance of these findings as clues of the mechanism maintaining verbal information (i.e., verbal working memory) is discussed.

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