This site provides information about the main study. A pilot study that was conducted to pre-test the materials and to obtain a first impression of the effects that can be expected is summarized on a separate site (use the navigation bar above to reach the pilot study).

1 Demo Version of Experiment

To see a demo of the experiment in a separate browser window, click here.

To download the program files of the experiment, click here.

2 Data

2.1 Data set information

The data set contains the following columns:

  • subj_code: a subject code
  • condition: condition variable (1 to 4)
  • desktop_conf: confirmation that desktop PC was used
  • attent_conf: confirmation that subj. is willing to pay attention
  • prevalence: (main) experimental factor coding whether subjects did or did not receive information about the base rate of the unobserved feature
  • latent_feature: the latent feature in the test case (beak vs. feet)
  • LS_bias_probe_stim: the latent scope test pic subjects saw
  • scale_orient: counterbalancing factor coding if narrow scope explan. was on the left or right side of the rating scale
  • instr_tests: number of attempts it took a subject to pass instruction test
  • LS_bias_probe_rating: subjects rating for the latent scope test probe
  • explanation: subjects explanation of their latent scope test probe rating
  • bluefeet_choice: subjects’ selected explanation for the additional probe without latent scope (duck with blue feet and normal beak)
  • bluebeak_choice: subjects’ selected explanation for the additional probe without latent scope (duck with blue beak and normal feet)
  • typical_choice: subjects’ selected explanation for the additional probe without latent scope (duck with normal beak and normal feet)
  • bluefeet_bluebeak_choice: subjects’ selected explanation for the additional probe without latent scope (duck with blue beak and blue feet)
  • age: subjects’ age
  • gender: subjects’ gender
  • tech_issues: subjects report of technical issues
  • rating_rec: recdoded ratings for the latent scope bias probe (so that negative values mean narrow scope pref. and positive ratings mean braod scope pref.)

4 Analysis of subjects’ explanations

Note: A .csv file containing all subject explanations is included in the folder that come with the R-Markdown code download.

5 Study planning

The study adopted a sequential testing strategy (for more information on sequential testing, see this website).

2023 Simon Stephan.