A laboratory study comparing relational representations developed using the Data Aggregation approach with the Logical Relational Design Methodology (LRDM) was conducted to investigate whether non-expert users could better comprehend and apply either methodology. While no significant differences between user performance were noted, the study did find that subjects following the LRDM produced quality Entity-Relationship (ER) representations, but there was a marked deterioration of the translation to the relational form. The Data Aggregation solutions were generally poor in quality. The study concludes that while non-expert designers can produce acceptable data abstractions using a conceptual modeling methodology (e.g., ER diagrams), problems may arise during conversion to normalized relations (e.g., relational representations).
Batra, Dinesh and Kirs, Peeter J., "A COMPARISON OF THE DATA AGGREGATION APPROACH WITH THE LOGICAL RELATIONAL DESIGN METHODOLOGY" (1990). ICIS 1990 Proceedings. 44.