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. 2019 Oct 23;6(10):190232. doi: 10.1098/rsos.190232

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Example items from the MaRs-IB. (a) A simple item containing a one-relational change (i.e. only the colour changes) and answer options. The fourth option is the correct solution. (b) A harder item containing a three-relational change (i.e. shape, colour and position change). The third option is the correct solution.