Optimized Mnemonic Similarity Task
The Mnemonic Similarity Task began in 2007 (Kirwan & Stark, 2007) as a way to assess hippocampal function by using an object recognition memory task that consisted of studied targets, novel foils, and lures that had a controlled level of similarity (mnemonic similarity, not perceptual similarity) to studied items. It is available here on GitHub.
The goal of a number of studies in 2019-22 and one of the aims of an NIA grant (R01 AG066683-01) was to develop a more optimized version of the task that might be more suitable for clinical use. The results of these studies are published (Stark et al., 2023), but the outcome of those efforts is the oMST presented here.
Briefly, it is an continuous version of the MST using the old/similar/new response prompt and cutting down the stimuli to include 64 1st presentations, 20 repeated targets, and 44 similar lure trials. In addition, there is a guided instruction / practice task included. In total, it takes under half the time of the orignal task.
The code here uses jsPsych and JATOS to administer the experiment in your browser. The correct version of jsPsych is bundled here, but you will need to install JATOS and add these files into an "oMST" experiment you create (the name is up to you).