This map shows the geographic impact of David Hammer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by David Hammer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites David Hammer more than expected).
This network shows the impact of papers produced by David Hammer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by David Hammer. The network helps show where David Hammer may publish in the future.
Co-authorship network of co-authors of David Hammer
This figure shows the co-authorship network connecting the top 25 collaborators of David Hammer.
A scholar is included among the top collaborators of David Hammer based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with David Hammer. David Hammer is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Hammer, David, Julia Gouvea, & Jessica Watkins. (2018). Idiosyncratic cases and hopes for general validity: what education research might learn from ecology. 41(4). 625–674.3 indexed citations
Berland, Leema K. & David Hammer. (2011). Framing for scientific argumentation. Journal of Research in Science Teaching. 49(1). 68–94.279 indexed citations
9.
Hammer, David, et al.. (2010). Framing and Resource Activation: Bridging the Cognitive-Situative Divide Using a Dynamic Unit of Cognitive Analysis. eScholarship (California Digital Library). 32(32).5 indexed citations
Gupta, Ayush, David Hammer, & Edward F. Redish. (2008). Towards a dynamic model of learners' ontologies in physics. International Conference of Learning Sciences. 313–318.4 indexed citations
12.
Levin, Dan, et al.. (2008). The scientific method and scientific inquiry: tension as in teaching and learning. International Conference of Learning Sciences. 374–381.1 indexed citations
13.
Hammer, David, Loucas S. Louca, Bruce Sherin, et al.. (2008). How to study learning processes? reflection on methods for fine-grain data analysis. 306–313.2 indexed citations
14.
Hammer, David & Emily van Zee. (2006). Seeing the science in children's thinking : case studies of student inquiry in physical science : a staff developer's guide. Heinemann eBooks.3 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.