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Published in: Learning & Behavior 2/2023

29-06-2022

On the role of interference in sequence learning in Guinea baboons (Papio papio)

Authors: Laura Ordonez Magro, Joël Fagot, Jonathan Grainger, Arnaud Rey

Published in: Learning & Behavior | Issue 2/2023

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Abstract

It is well established that decay and interference are the two main causes of forgetting. In the present study, we specifically focus on the impact of interference on memory forgetting. To do so, we tested Guinea baboons (Papio papio) on a visuo-motor adaptation of the Serial Reaction Time task in which a target sequence is repeated, and a random sequence is interposed between repetitions, a similar situation as the one used in the Hebb repetition paradigm. In this task, one three-item sequence, the repeated sequence, was presented every second trial and interleaved with random sequences. Interference was implemented by using random sequences containing one item that was also part of the repeated sequence. In a first condition, the overlapping item was located at the same position as the repeated sequence. In a second condition, the overlapping item was located at one of the two other positions. In a third condition, there was no overlap between repeated and random sequences. Contrary to previous findings, our results reveal similar learning slopes across all three conditions, suggesting that interference did not affect sequence learning in the conditions tested. Findings are discussed in the light of previous research on sequence learning and current models of memory and statistical learning.

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Appendix
Available only for authorised users
Footnotes
1
Thus, the inter-stimulus interval depends on the moment the baboon decides to press the yellow fixation cross. As the length of the inter-stimulus interval can help subjects to separate trials and eventually help to minimize interference between trials, it is important to mention that we deliberately decided to let the baboons initiate the next trials in order to make sure that they are alert after having been rewarded with the grains. For a video, see https://​osf.​io/​7h8cd/​?​view_​only=​ec264f23c01f4b94​b4571543b494d867​
 
2
As this condition was the same as in our previous study, we only retained the 500 first trials in order to compare the results across experiments.
 
3
We compared the learning slope of Position 1 with the mean slope of Positions 2 + 3 because if learning takes place, we should observe a steeper learning slope for the predictable Positions 2 and 3 compared to the less predictable Position 1. Moreover, averaging both predictable positions allowed us to obtain more data points and thus more robust results.
 
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Metadata
Title
On the role of interference in sequence learning in Guinea baboons (Papio papio)
Authors
Laura Ordonez Magro
Joël Fagot
Jonathan Grainger
Arnaud Rey
Publication date
29-06-2022
Publisher
Springer US
Published in
Learning & Behavior / Issue 2/2023
Print ISSN: 1543-4494
Electronic ISSN: 1543-4508
DOI
https://doi.org/10.3758/s13420-022-00537-1

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