Related Experiment Videos
Effects of same-category and different-category extraneous memory sets on item recognition
1Department of Psychology, University of Nevada, Las Vegas 89154.
Memory & Cognition
|September 1, 1994
Summary
This study investigated cognitive processing models using Sternberg's item recognition task. Findings suggest parallel processing may occur when distinguishing between memory sets, challenging serial search models.
Area of Science:
- Cognitive Psychology
- Human Memory Research
Background:
- Sternberg's item recognition task is used to study memory search processes.
- Previous research has proposed both parallel and serial models to explain performance.
- Krueger (1975) explored these models by presenting subjects with dual memory sets.
Purpose of the Study:
- To differentiate between parallel and serial models of cognitive performance.
- To replicate and extend Krueger's (1975) findings on dual-set memory tasks.
- To investigate the impact of set homogeneity on response latency.
Main Methods:
- Replication of Krueger's (1975) dual-set procedure with letters and digits.
- Experiment 2 used digit-only sets to force discrimination between core and extraneous sets.
- Response latency (RT) was measured for probes to both memory sets.
Main Results:
- Initial trials showed RT increasing with extraneous set size, consistent with Krueger's early findings.
- In Experiment 2, core task RT was unaffected by added set size.
- Added task RT increased with core set size, contradicting serial search predictions.
Conclusions:
- Results from Experiment 2 challenge the serial search model for item recognition.
- Findings suggest that parallel processing mechanisms may be involved when discriminating between memory sets.
- The homogeneity of memory sets influences cognitive search strategies.