Estimating the effects of various clustering schemes on recall order

Author(s):  
Chris Robertson ◽  
Hadyn D. Ellis
Keyword(s):  

2021 ◽  
Vol 13 ◽  
Author(s):  
Matteo De Marco ◽  
Daniel J. Blackburn ◽  
Annalena Venneri

Background: Category Fluency Test (CFT) is a common measure of semantic memory (SM). Test performance, however, is also influenced by other cognitive functions. We here propose a scoring procedure that quantifies the correlation between the serial recall order (SRO) of words retrieved during the CFT and a number of linguistic features, to obtain purer SM measures. To put this methodology to the test, we addressed a proof-of-concept hypothesis whereby, in alignment with the literature, older adults would show better SM.Methods: Ninety participants (45 aged 18–21 years; 45 aged 70–81 years) with normal neurological and cognitive functioning completed a 1-min CFT. SRO was scored as an ordinal variable incrementing by one unit for each valid entry. Each word was also scored for 16 additional linguistic features. Participant-specific normalised correlation coefficients were calculated between SRO and each feature and were analysed with group comparisons and graph theory.Results: Younger adults showed more negative correlations between SRO and “valence” (a feature of words pleasantness). This was driven by the first five words generated. When analysed with graph theory, SRO had significantly higher degree and lower betweenness centrality among older adults.Conclusion: In older adults, SM relies significantly less on pleasantness of entries typically retrieved without semantic control. Moreover, graph-theory metrics indicated better optimised links between SRO and linguistic features in this group. These findings are aligned with the principle whereby SM processes tend to solidify with ageing. Although additional work is needed in support of an SRO-based item-level scoring procedure of CFT performance, these initial findings suggest that this methodology could be of help in characterising SM in a purer form.



2018 ◽  
Vol 32 (5) ◽  
pp. 600-609 ◽  
Author(s):  
Sonja P. Brubacher ◽  
Becky Earhart ◽  
Kim P. Roberts ◽  
Martine B. Powell
Keyword(s):  


1979 ◽  
Vol 5 (2) ◽  
pp. 151-156
Author(s):  
G.E. Sawyer ◽  
R.J. Riding
Keyword(s):  


1972 ◽  
Vol 11 (2) ◽  
pp. 153-155 ◽  
Author(s):  
Howard Rollins ◽  
Mark Everson ◽  
Donald L. Schurman
Keyword(s):  


2002 ◽  
Vol 30 (3) ◽  
pp. 474-476

In a rare step, the U.S. Food and Drug Administration (FDA) in August ordered Cryolife Corporation to recall all human soft tissue it had processed since October of last year, stating that the safety of Cryolife products could not be assured. Although a subsequent agreement between the FDA and Cryolife led to a limited relaxation on the recall order for “medically urgent uses when alternative therapies are exhausted or unavailable,” the sale of Cryolife soft tissue remains severely restricted. Cryolife insists that its procedures are safe and that its overall rates of infection are extremely low, and is appealing the FDA recall?Cryolife is the nation’s largest processor of donated human tissue, and supplies 15 to 20 percent of the market for soft tissue implants. Such implants are widely used in elective orthopedic surgery: about 650,000 Americans have surgery involving soft tissue implants each year. Cryolife also processes 70 percent of the country’s heart valves.



1983 ◽  
Vol 96 (3) ◽  
pp. 315 ◽  
Author(s):  
Michael J. Watkins ◽  
Zehra F. Peynircioglu


1989 ◽  
Vol 64 (3) ◽  
pp. 803-808
Author(s):  
Koichi Sato

The effect of recall order on long-term recency effects in the continuous-distractor paradigm was investigated. Each list contained a series of pairs, each of a word and a number. In a recall session, subjects were given the numbers as probes and recalled the words paired with the numbers. Long-term recency effects were largely reduced when subjects recalled words from the primacy portion prior to other words, as in the case of short-term recency effects observed in the immediate-recall paradigm. These results suggest that the same mechanisms underlie the short-term and the long-term recency effects.



Author(s):  
Gerald M. Senf ◽  
Howard A. Rollins ◽  
Millard C. Madsen


1970 ◽  
Vol 22 (3) ◽  
pp. 347-352 ◽  
Author(s):  
Herman Buschke ◽  
Walter Kintsch

Immediate free recall of random strings of 10 numbers was studied under four experimental conditions: as each number was presented, subjects either had to recall the previous number (Recall n–1), recall the number just presented (Recall n), read the number (Read aloud), or were silent (Free Recall). Overall recall was the same in all conditions. Recall and order of recall by serial-position changed systematically, with an increasing recency and decreasing primacy effect from Free Recall through Read Aloud and Recall n to Recall n–1. These changes in recall order and serial-position curves suggest that differential rehearsal of items is decreased by requiring retrieval during presentation.



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