Repetition enhances the effects of activated long-term memory
Lindsay Plater1, Sandra Nyman1, Samantha Joubran1
1Department of Psychology, University of Guelph, Guelph, Ontario, Canada.
Quarterly Journal of Experimental Psychology (2006)
|April 11, 2022
Summary
Repeating visual stimuli enhances activated long-term memory (LTM) effects on attention. This suggests LTM activation is continuous, not discrete, impacting perception and guiding attention.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Visual Memory
Background:
- Visual long-term memory (vLTM) representations are known to interact with perception and guide attention.
- This interaction is thought to occur via an 'activated LTM' state, but its nature remains unclear.
- Key questions involve whether activated LTM effects can be enhanced and if activation is discrete or continuous.
Purpose of the Study:
- To investigate if repetition of visual stimuli enhances the attentional effects of activated LTM.
- To determine whether activated LTM is a discrete or continuous state.
- To explore the relationship between activated LTM and perceptual guidance of attention.
Main Methods:
- A modified Sternberg task was employed to measure intrusion effects.
- Participants viewed two lists of complex visual objects, with one list cued as relevant and the other as irrelevant.
- Object repetition varied: some objects appeared 10 times (repeat trials), while others appeared once (non-repeat trials).
Main Results:
- Intrusion effects were larger for repeat trials compared to non-repeat trials, indicating repetition enhances activated LTM.
- The difference in intrusion effects between repeat and non-repeat trials suggests that LTM activation is continuous.
- Reaction times were longer for irrelevant list objects than novel objects, demonstrating an attentional influence.
Conclusions:
- Stimulus repetition can amplify the effects of activated LTM.
- Findings support a continuous model of LTM activation, where varying levels of activation influence perception.
- Researchers are advised to use stimulus repetition to strengthen LTM effects and enhance interactions with perception.
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