Replicating SHJ in the classroom

Replication is pretty important for science, and so, I tried my SHJ tasks demo again this year. Same university, younger cohort. I’m quite chuffed by the results. We got a pretty clean effect, and the consistency between 2025 and 2026 is quite remarkable.

(Refinement is also important, so I tweaked my plots a little bit to plot the tasks as a function of their structural complexity)

If you are interested, the source code for this demo is available here (Pavlovia login required). All jsPsych references are hosted on Pavlovia’s servers, but if you want to serve it locally, just change those references to your local jsPsych installation (7+).