Related Experiment Video
Updated: May 6, 2026

Characterization of Complex Systems Using the Design of Experiments Approach: Transient Protein Expression in Tobacco as a Case Study
Published on: January 31, 2014
Testing the item-order account of design effects using the production effect
Tanya R Jonker1, Merrick Levene1, Colin M Macleod1
1Department of Psychology.
Memory recall is better for items processed uniquely, like reading aloud, compared to silent reading. This study shows that better memory for spoken words (production effect) is linked to how well item order is remembered.
Area of Science:
- Cognitive Psychology
- Memory Research
Background:
- Memory recall differs between within-subject and between-subject designs.
- The item-order account suggests differential retention of order information influences memory phenomena.
- The production effect (better memory for spoken vs. read words) exhibits a similar design-contingent pattern.
Purpose of the Study:
- To investigate if differential order retention underlies the production effect.
- To test the predictions of the item-order account regarding the production effect.
- To examine how list design (pure vs. mixed) affects order information retention in the production effect.
Main Methods:
- Two experiments were conducted using within-subject and between-subject designs.
- Participants engaged in either silent reading or spoken word generation (production).
- Order reconstruction tests and free recall were used to measure memory for item order.
Main Results:
- Order information retention was superior in pure silent lists compared to pure aloud or mixed lists.
- Experiment 2 demonstrated better order preservation in free recall for pure silent lists than for other list types.
- The findings align with the item-order account, extending its applicability to the production effect.
Conclusions:
- Differential retention of order information plays a role in explaining the production effect.
- The production effect, like other memory phenomena, is influenced by list design and order processing.
- This research supports the item-order account as a framework for understanding design-contingent memory effects.
Related Concept Videos
Experimental Designs
Methods of Medium Optimization
Factorial Design
Group Design
Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs
Comparing Experimental Results: Student's t-Test

