Some Online Experiments

Below is a list of online experiments I built a few years back while in grad school using jsPsych. All the examples below were used to prototype complex online experiments to study decision making under different contexts (e.g., food choice while multitasking). These were all built using an older version of jsPsych, so they could all be improved by being updated to work with the most recent version.

When I was working on these experiments I was able to embed them within a Qualtrics survey, however it appears there have been changes to the Qualtrics engine that broke my old approach. There may be a way to get these to integrate with the new engine, but I haven’t figured it out yet. The author of jsPsych has provided other tools to help distribute the experiments.

Dynamic Multitasking Choice Experiment

This experiment presents respondents with two tasks that must be completed under time pressure.

1. The top task presents two 3 x 3 grids containing pairs of numbers or letters in each cell. Participants are asked to compare the two grids and determine if the grids are an exact match or if the grids mismatch in any of the cells. Respondents have up to 15 seconds to make a determination.
2. The bottom tasks presents respondents with two images of food. Participants are asked to indicate which of the two options they prefer. Participants have up to 10 seconds to determine which food they prefer.

See the code here

Continuous Response Measure

This is an online implementation of a common measure used in communication and advertising research, a continuous response measure (CRM). The basic idea of the CRM is to get a moment by moment indication of how someone is responding to dynamic content (e.g., a television show, advertisement, etc.). At any moment during viewing the participant may move the slider from left to right, and the tool will log any change in value. Additionally, the tool is synched to the clock on the youtube video, so the CRM value can be tied to an exact moment/event. This is also helpful if there are any pauses or buffering issues during viewing.

See the code here

Categorize then Decide Experiment

This experiment presents respondents with a hypothetical scenario where they work for NASA. They are going to an alien world and are asked to interact with the locals of this new planet. During their interaction, the respondents are asked to determine which “group” of potential inhabitants a series of faces belongs to, and decide how to act (i.e, be nice or be defensive).

See the code here