Assessing students' understanding of object structures

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  • Andreas Mühling, Kiel University
  • ,
  • Carsten Schulte, Paderborn University
  • ,
  • Jens Bennedsen
  • Lea Budde, Paderborn University
  • ,
  • Gregor Große-Bölting, Kiel University

We present a theoretically derived and empirically tested competence model related to the concepts of "object state" and "references" that both form an important part of object-oriented programming. Our model characterizes different levels of programming capability with a focus on possible learning stages of beginning learners. It is based on the notion of understanding objects and their interaction with each other during the runtime of a program. Based on a hierarchical description of our theory, we derive a two-dimensional structure that separates the hierarchy into two facets "structure" (how are objects structured/stored) and "behaviour" (how do objects interact and access each other). Based on this, we have developed a set of items and collected data in a CS1 course (N = 195) to validate the item-set. We analyzed the data using a Rasch model to check item difficulty and the presence of different difficulty levels, and factor analysis to check the dimensions of the model. Furthermore, we argue for the validity of the items with the help of additional data collected from the students. The results indicate that our theoretical assumptions are correct and that the items will be usable with some minor modifications.

Titel19th Koli Calling International Conference on Computing Education Re-search (Koli Calling ’19), November 21–24, 2019, Koli, Finland
Antal sider10
ForlagAssociation for Computing Machinery
ISBN (trykt)978-1-4503-7715-7
StatusUdgivet - 2019
Begivenhed19th Koli Calling Conference on Computing Education Research, Koli Calling 2019 - Koli, Finland
Varighed: 21 nov. 201924 nov. 2019


Konference19th Koli Calling Conference on Computing Education Research, Koli Calling 2019
SponsorUniversity of Adelaide, University of Eastern Finland, University of Helsinki

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