Results and discussion
Limited-feedback
Descriptive statistics are presented in Table Descriptive statisticsReliability is calculated using Pearson’s To determine whether trial difficulty was consistent between the feedback conditions in Study 2 and the no-feedback condition in Study 3, we tested for cross-condition correlations for the percentage of participants who responded correctly on each trial. Figure Percentage of participants who responded correctly per trial in Study 2 and 3. Note. Limited-feedback and full-feedback conditions are from Study 2, No-feedback condition is from Study 3. The solid vertical line indicates trial 10, after which feedback only continues for the full-feedback conditionAlthough the Blast Test was not designed to reveal strategy use, we suspected that participants who rely primarily on a simple rule may choose to use size as the basis and select the largest cell as being cancerous. We measured the maximum diameter of the cells in each trial, excluding small appendages (except in the case of ties), and found that size was diagnostic in nine of the first ten trials, and 70% of first-half trials, but only diagnostic in 33% of second-half trials.