Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Why is science difficult to learn? Things are seldom what they seem
Countries citing papers authored by A. H. Johnstone
Since
Specialization
Citations
This map shows the geographic impact of A. H. Johnstone'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 A. H. Johnstone with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. H. Johnstone more than expected).
This network shows the impact of papers produced by A. H. Johnstone. 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 A. H. Johnstone. The network helps show where A. H. Johnstone may publish in the future.
Co-authorship network of co-authors of A. H. Johnstone
This figure shows the co-authorship network connecting the top 25 collaborators of A. H. Johnstone.
A scholar is included among the top collaborators of A. H. Johnstone 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 A. H. Johnstone. A. H. Johnstone is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Johnstone, A. H.. (1997). How long is a chain ? Reasoning in science. School science review. 78(285). 73–77.2 indexed citations
5.
Johnstone, A. H.. (1997). Chemistry Teaching: Science or Alchemy?.. Journal of Chemical Education. 74(3).112 indexed citations
6.
Johnstone, A. H.. (1980). Stereopsis in Chemistry.. 17(6). 172.2 indexed citations
7.
Johnstone, A. H., et al.. (1979). A Model for Undergraduate Practical Work.. 16(1). 16–17.7 indexed citations
8.
Friel, Susan N. & A. H. Johnstone. (1979). Does the Position Matter. 16(6). 175.4 indexed citations
9.
Friel, Susan N. & A. H. Johnstone. (1978). A Review of the Theory of Objective Testing.. School science review.3 indexed citations
10.
Johnstone, A. H.. (1977). Chemical Equilibrium and Its Conceptual Difficulties..49 indexed citations
11.
Johnstone, A. H., et al.. (1977). Practical Work in Its Own Right..3 indexed citations
12.
Johnstone, A. H., et al.. (1976). Practical Work in the Scottish O-Grade..6 indexed citations
13.
Johnstone, A. H., et al.. (1976). Attention Breaks in Lectures..107 indexed citations
14.
Johnstone, A. H., et al.. (1974). Condensation and Hydrolysis - An Optical Problem?..7 indexed citations
15.
Johnstone, A. H., et al.. (1974). Chemistry check-up.3 indexed citations
16.
McGuire, Joseph W. & A. H. Johnstone. (1974). Projects in Scotland..
17.
Johnstone, A. H., et al.. (1973). How Students Reason in Objective Tests..
18.
Duncan, Ishbel & A. H. Johnstone. (1973). The Mole Concept..29 indexed citations
19.
Johnstone, A. H.. (1971). Topic Difficulties in Chemistry..21 indexed citations
20.
Johnstone, A. H., et al.. (1964). Chemistry takes shape.2 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.